Welcome on Andrea Ehrmann's website!

 

News

 

2024 - December 16

How can nanofibrous sensors be used for health monitoring?

N. S. Mpofu, T. Blachowicz, A. Ehrmann, G. Ehrmann
Wearable electrospun nanofibrous sensors for health monitoring
Micro 4, 798-822 (2024)

 

2024 - November 08

Will PAN:PEO nanofibers become porous after washing out PEO or after carbonization?

N. S. Mpofu, Y. Topuz, E. Stepula, U. Güth, T. Grothe, J. L. Storck, M. Wortmann, B. Mahltig, A. Ehrmann
Influence of PAN:PEO ratio on the morphology of needleless electrospun nanofiber mats before and after carbonization
Fibers 12, 97 (2024)

 

2024 - October 18

The first combination of clinostat and 3D Helmholtz cage will allow us performing experiments in simulated microgravity and hypomagnetic field:

M. Malczyk, T. Blachowicz, A. Ehrmann
Coupled system of dual-axis clinostat and Helmholtz cage for simulated microgravity experiments
Applied Sciences 14, 9517 (2024)

 

2024 - October 10

After investigating the homogeneity of PAN nanofiber mats, here we discuss the homogeneity of gelatin nanofiber mats:

C. Teyeb, T. Grothe, M. Dotter, I. Kola, A. Ehrmann
Homogeneity of physical properties of electrospun gelatin nanofiber mats
Sustainable & Green Materials, online first (2024)

 

2024 - October 09

How can properties of single nanofibers be detected?

T. Blachowicz, N. S. Mpofu, A. Ehrmann
Measuring physical and chemical properties of single nanofibers for energy applications – possibilities and limits
Nanoenergy Advances 4, 300-317 (2024)

 

2024 - October 08

How safe is the use of hydrogen for storing regenerative energies?

E. Davies, A. Ehrmann, E. Schwenzfeier-Hellkamp
Safety of hydrogen storage technologies
Processes 12, 2182 (2024)

 

2024 - September 17

And another paper about 3D printing on textile fabrics, this time comparing FDM and SLA printing:

K. Tuvshinbayar, N. S. Mpofu, T. Berger, J. L. Storck, A. Büsgen, A. Ehrmann
Comparison of FDM and SLA printing on woven fabrics
Communications in Development and Assembling of Textile Products 5, 169-177 (2024)

 

2024 - September 17

Our next paper investigates SLA printing on textile fabrics and suggests a textile holder for this process:

P. Gruhn, D. Koske, J. L. Storck, A. Ehrmann
Three-dimensional printing by vat photopolymerization on textile fabrics: method and mechanical properties of the textile/polymer composites
Textiles 4, 417-425 (2024)

 

2024 - August 14

Here we report the first adhesion tests of PJM printed MED610 on textile fabrics:

T. Kozior, N. S. Mpofu, J. Fiedler, A. Ehrmann
Influence of textile substrates on the adhesion of PJM-printed MED610 and the surface morphology
Tekstilec 67, 252-265 (2024)

 

2024 - July 25

And another review paper, this time dealing with special exchange bias systems:

T. Blachowicz, M. Malczyk, A. Ehrmann, M. Wortmann
Exchange-bias in Fe/FeF2 and Fe/MnF2 model systems
AIP Advances 14, 070703 (2024)

 

2024 - July 24

Our next review paper gives an overview of the advantages of magnetic substrates in tissue engineering:

T. Blachowicz, A. Ehrmann
Magnetic substrates for tissue engineering – a review
Magnetochemistry 10, 52 (2024)

 

2024 - June 20

Can microalgae also grow at the air?

P. Steinmetz, L. Diel, S. Gehrmann, D. Knehans, G. Primandaru, E. Tanzli, B. Brockhagen, A. Ehrmann
Growth of the green microalga chlorella vulgaris outside a cultivation medium
International Journal of Mechanics and Control 25, 53-58 (2024)

 

2024 - June 02

As an alternative to expensive commercial air permeability testers for textile fabrics, we built, tested and simulated an inexpensive testing instrument:

D. Spädt, N. Richter, C. Golle, A. Ehrmann, and L. Sabantina
Comparison of a custom-made inexpensive air permeability tester with a standardized measurement instrument
Technologies 12, 79 (2024)

 

2024 - May 01

Is it possible to harvest and store enough energy in garments to heat people over night?

T. Blachowicz, M. Malczyk, I. Kola, G. Ehrmann, E. Schwenzfeier-Hellkamp, A. Ehrmann
Textiles for Very Cold Environments
Processes 12, 927 (2024)

 

2024 - April 06

How can small magnetic sensors be used in health monitoring?

T. Blachowicz, I. Kola, A. Ehrmann, K. Guenther, G. Ehrmann
Magnetic micro and nano sensors for continuous health monitoring
Micro 4, 206-228 (2024)

 

2024 - February 23

Which biopolymers can be used for which energy applications?

J. S. Joshi, S. V. Langwald, A. Ehrmann, L. Sabantina
Algal-based biopolymers for batteries and biofuel application in comparison with bacterial biopolymers – a review
Polymers 16, 610 (2024)

 

2024 - February 21

Here we investigated the influence of the magnetite content on PAN/magnetite composite nanofibers:

A. K. Graciano Alvarez, M. Dotter, K. Tuvshinbayar, L. Bondzio, I. Ennen, A. Hütten, T. Blachowicz, A. Ehrmann
Electrospinning poly(acrylonitrile) containing magnetite nanoparticles: influence of magnetite contents
Fibers 12, 19 (2024)

 

2024 - February 05

Are 3D printed titanium surface more attractive for cell growth and proliferation than common titanium sheets?

E. Tanzli, T. Kozior, J. Hajnys, J. Mesicek, B. Brockhagen, T. Grothe, A. Ehrmann
Improved cell growth on additively manufactured Ti64 substrates with varying porosity and nanofibrous coating
Heliyon, online first, e25576 (2024)

 

2024 - January 09

The new year starts with a book chapter about mammalian cell growth on electrospun nanofiber mats and a study of the training effect for large numbers of magnetization reversal cycles in exchange bias systems:

A. Ehrmann
Electrospun Nanofiber Mats for Mammalian Cell Growth
In G. Guxho, T. Spahiu, V. Prifti, A. Gjeta, E. Xhafka, A. Sulejmani (Eds.), Proceedings of the Joint International Conference: 10th Textile Conference and 4th Conference on Engineering and Entrepreneurship, Springer Nature, 2024, pp. 518-527

J. Fiedler, M. Wortmann, T. Blachowicz, A. Ehrmann
Modeling the training effect in exchange-biased bilayers for large numbers of magnetization reversal cycles
pssb 261, 2300435 (2024)

 

2023 - December

After some waiting time, our paper about the growth of P. ostreatus in simulated microgravity is finally published:

A. Heide, P. Wiebe, L. Sabantina, T. Blachowicz, A. Ehrmann
Testing the growth of Pleurotus ostreatus in simulated microgravity by a clinostat
In E. Kurt, M. Tekerek (Eds.), Perspectives in Engineering, Necmettin Erbakan University Press: 262, 2023

 

2023 - December 29

And for the last paper of 2023, we chose an important topic related to the textile industry:

A. K. Schnatmann, F. Schoden, A. Ehrmann, E. Schwenzfeier-Hellkamp
R principles for circular economy in the textile industry – a mini-review
CDATP 4, 295-305 (2023)

 

2023 - December 28

For Co/Co3O4(111) bilayers, we found an unexpected angular isotropy of the exchange bias:

M. Wortmann, T. Samanta, M. Gaerner, M. Westphal, J. Fiedler, I. Ennen, A. Hütten, T. Blachowicz, L. Caron, A. Ehrmann
Isotropic Exchange-Bias in Twinned Epitaxial Co/Co3O4 Bilayer
APL Materials 11, 121118 (2023)

 

2023 - October 16

One of the reasons why we develop a crocheting machine is the low reproducibility of hand-crocheted fabrics:

J. L. Storck, L. Steenbock, M. Dotter, H. Funke, A. Ehrmann
Principle capabilities of crocheted fabrics for composite materials
Journal of Engineered Fibers and Fabrics 18, 15589250231203381 (2023)

 

2023 - October 11

Another contribution from our group against the "reproducibility crisis":

M. Wortmann, M. Westphal, B. Kaltschmidt, M. Klöcker, A. S. Layland, B. Brockhagen, A. Hütten, N. Frese, A. Ehrmann
Nanofibers are a Matter of Perspective: Effects of Methodology and Subjectivity on Diameter Measurements
Nanoscale Advances, online first (2023)

 

2023 - September 29

Mycelium-reinforced nanofiber mats filter dyes often better than the pure membranes:

A. Heide, P. Wiebe, L. Sabantina, A. Ehrmann
Suitability of mycelium-reinforced nanofiber mats for filtration of different dyes
Polymers 15, 3951 (2023)

 

2023 - September 16

The next Erasmus-project together with our colleagues from Tirana deals with textile ECG electrodes:

D. Doci, M. Ademi, K. Tuvshinbayar, N. Richter, G. Ehrmann, T. Spahiu, A. Ehrmann
Washing and abrasion resistance of textile electrodes for ECG measurements
Coatings 13, 1624 (2023)

 

2023 - September 13

A recent project of our group deals with stab-resistance of 3D-printed/textile composites:

S. Cakar, A. Ehrmann
Adhesion and stab-resistant properties of FDM-printed polymer/textile composites
Tekstilec 66, 211-217 (2023)

 

2023 - September 06

Together with our Erasmus colleagues from Albania, we investigated the homogeneity of apparently homogeneous nanofiber mat:

E. Morina, M. Dotter, C. Döpke, I. Kola, T. Spahiu, A. Ehrmann
Homogeneity of needleless electrospun nanofiber mats
Nanomaterials 13, 2507 (2023)

 

2023 - August 29

The next paper discusses EMI shielding by a broad range of different textile fabrics:

D. Wójcik, M. Surma, M. Magnuski, T. Blachowicz, K. Tuvshinbayar, M. Dotter, Y. Topuz, A. Ehrmann
Experimental verification of the shielding properties of selected textile materials in the X frequency band
Applied Sciences 13, 9777 (2023)

 

2023 - August 25

After a long pause due to too much other work during summer term, today two papers were published, reflecting different research aspects of our group:

T. Blachowicz, A. Ehrmann, M. Wortmann
Exchange Bias in Nanostructures: An Update
Nanomaterials 13, 2418 (2023)

T. Kozior, A. Ehrmann
First proof-of-principle of PolyJet 3D printing on textile fabrics
Polymers 15, 3536 (2023)

 

2023 - May 11

Novel FDM filaments were 3D printed on different textiles:

G. Erdem, T. Grothe, A. Ehrmann
Adhesion of new thermoplastic materials printed on textile fabrics
Tekstilec 66, 57-63 (2023)

 

2023 - May 07

Commercially available air permeability testers are too expensive for your lab? Here's a simple alternative:

L. Sabantina, A. Ehrmann
New testing device for air permeability
Communications in Development and Assembling of Textile Products 4, 164-170 (2023)

 

2023 - April 30

Here we give an overview of different methods to measure various physical properties of electrospun nanofiber mats:

S. V. Langwald, A. Ehrmann, L. Sabantina
Measuring physical properties of electrospun nanofiber mats for different biomedical applications
Membranes 13, 488 (2023)

 

2023 - April 18

Which optical properties can nanofibrous membranes have?

T. Blachowicz, A. Ehrmann
Optical properties of electrospun nanofiber mats
Membranes 13, 441 (2023)

 

2023 - April 12

AFM phase imaging can reveal 3D printed material blends:

E. Werner, U. Güth, B. Brockhagen, C. Döpke, A. Ehrmann
Examination of polymer blends by AFM phase images
Technologies 11, 56 (2023)

 

2023 - March 25

Is it possible to sandwich a textile fabric by 3D printing so that it sticks at its position?

M.-S. Özev, A. Ehrmann
Sandwiching textiles with FDM Printing
Communications in Development and Assembling of Textile Products 4, 88-94 (2023)

 

2023 - March 23

In our recent Feature Paper, we investigate washing of single circuit board for smart textiles and suggest an advanced code for BMP calculation by optical pulse sensors:

N. Richter, K. Tuvshinbayar, G. Ehrmann, A. Ehrmann
Usability of inexpensive optical pulse sensors for textile integration and heart beat detection code development
Electronics 12, 1521 (2023)

 

2023 - March 15

Working on textile EMI shielding materials, here we review the recent literature about this topic:

T. Blachowicz, D. Wójcik, M. Surma, M. Magnuski, G. Ehrmann, A. Ehrmann
Textile fabrics as electromagnetic shielding materials – a review of preparation and performance
Fibers 11, 29 (2023)

 

2023 - March 13

Which problems can occur in 3D printing conductive polymer composites, and which new developments are there?

T. Blachowicz, G. Ehrmann, A. Ehrmann
Recent developments in additive manufacturing of conductive polymer composites
Macromolecular Materials and Engineering 308, 2200692 (2023)

 

2023 - February 16

New materials and techniques allow improving polymeric body-armor:

N. Panneke, A. Ehrmann
Stab-resistant polymers – recent developments in materials and structures
Polymers 15, 983 (2023)

 

2023 - February 07

The dimensional accuracy of 3D printed objects depends, among others, on the printing parameters:

B. Ekinci, A. Ehrmann
Influence of Printing Parameters on the Dimensional Accuracy of Concave/Convex Objects in FDM Printing
Eng. Proc. 31, 40 (2023)

 

2023 - February 01

Finally our paper about the possibility to investigate magnetic properties of coated electrospun nanofiber mats with MOKE and MFM is published:

O. Brocks, A. Stasiak, J. Biedinger, M. Wortmann, T. Blachowicz, R. Kaschuba, A. Ehrmann
MOKE and MFM on magnetically coated nanofiber mats – transferring well-known methods to uncommon samples
Applied Research, online first (2023)

 

2023 - January 13

Again working on neuromorphic computing, we simulated how rotating magnetic fields of different dimensions influence domain wall nucleation, propagation and annihilation in differently modeled nanowires:

T. Blachowicz, P. Steblinski, A. Ehrmann
Influence of Physical Symmetries on the Magnetization Dynamics in Magnetic Fibers
Symmetry 15, 234 (2023)

 

2022 - September 17

Working on a project about magnetic shielding in the moment, we also investigated 3D printing of magnetic composites:

G. Ehrmann, T. Blachowicz, A. Ehrmann
Magnetic 3D-Printed Composites - Production and Applications
Polymers 14, 3895 (2022)

 

2022 - August 10

Magnetic nano-spheres can show interesting effects based on magneto-crystalline anisotropies:

P. Steblinski, T. Blachowicz, A. Ehrmann
Analysis of the energy distribution of iron nano-spheres for bit-patterned media
J. Magn. Magn. Mater. 562, 169805 (2022)

 

2022 - August 05

Agglomerations of magnetic nanoparticles in polymer matrices strongly change the composite's magnetic properties:

T. Blachowicz, J. Grzybowski, A. Ehrmann
Influence of agglomerations on magnetic properties of polymer matrices filled with magnetic nanoparticles
Materials Today: Proceedings 67(5), 792-796 (2022)

 

2022 - July 11

Still working on materials for micro-satellites and other space applications:

J. L. Storck, G. Ehrmann, U. Güth, J. Uthoff, S. V. Homburg, T. Blachowicz, A. Ehrmann
Investigation of Low-Cost FDM-Printed Polymers for Elevated-Temperature Applications
Polymers 14, 2826 (2022)

 

2022 - June 22

Phase-change memory belongs to the recently strongly investigated non-volatile memory techniques:

A. Ehrmann, T. Blachowicz, G. Ehrmann, T. Grethe
Recent developments in phase-change memory
Applied Research, online first, e202200024 (2022)

 

2022 - May 29

Combining 3D printing with electrospinning may be useful for tissue engineering, but necessitates a proper choice of the 3D printing material:

L. Bauer, L. Brandstäter, M. Letmate, M. Palachandran, F. O. Wadehn, C. Wolfschmidt, T. Grothe, U. Güth, A. Ehrmann
Electrospinning for the modification of 3D objects for the potential use in tissue engineering
Technologies 10, 66 (2022)

 

2022 - May 24

Our new review paper gives an overview of EMI shielding with nanofiber mats:

T. Blachowicz, A. Hütten, A. Ehrmann
Electromagnetic Interference Shielding with Electrospun Nanofiber Mats—A Review of Production, Physical Properties and Performance
Fibers 10, 47 (2022)

 

2022 - May 01

Here we suggest a new, simple method to evaluate the skin contact of textile ECG electrodes:

K. Tuvshinbayar, G. Ehrmann, A. Ehrmann
50/60 Hz Power Grid Noise as a Skin Contact Measure of Textile ECG Electrodes
Textiles 2, 265-274 (2022)

 

2022 - April 30

Composite nanofibers electrospun from ZnO and TiO2 can increase the efficiency of DSSCs:

Q. Q. Chang, J. Xu, Y. J. Han, A. Ehrmann, T. H. He, R. P. Zheng
Photoelectric performance optimization of dye-sensitized solar cells based on ZnO-TiO2 composite nanofibers
Journal of Nanomaterials 2022, 7356943 (2022)

 

2022 - April 15

Here we show the influence of agglomerations in magnetic nanoparticles in polymeric matrices, like in electrospun nanofibers:

T. Blachowicz, J. Grzybowski and A. Ehrmann
Micromagnetic simulations of nanoparticles with varying amount of agglomeration
Macromolecular Symposia 402, 2100381 (2022)

 

2022 - April 09

Keratin can be extracted from wool and electrospun with PAN:

S. Goyal, M. Dotter, E. Diestelhorst, J. L. Storck, A. Ehrmann, B. Mahltig
Extraction of keratin from wool and its use as biopolymer in film formation and in electrospinning for composite material processing
J. Eng. Fibers Fabr. 17, 15589250221090499 (2022)

 

2022 - March 21

AFM measurements on biological and other soft materials can be challenging, but offer many insights into different physical and chemical material parameters:

J. Joshi, S. V. Homburg, A. Ehrmann
Atomic force microscopy (AFM) on biopolymers and hydrogels for biotechnological applications – possibilities and limits
Polymers 14, 1267 (2022)

 

2022 - March 08

Our latest DSSC measurements were performed for more than one year, showing longevity of glycerol-based electrolytes:

K. Gossen, M. Dotter, B. Brockhagen, J. L. Storck, A. Ehrmann
Long-term investigation of unsealed DSSCs with glycerol-based electrolytes of different compositions
AIMS Materials Science 9, 283-296 (2022)

 

2022 - March 02

A new approach to understand stop marks in warp-knitted fabrics:

C. Hellert, M. Kieren and A. Ehrmann
Time-dependence of stop marks in warp-knitted fabrics
Tekstilec 65, 84-90 (2022)

 

2022 - March 01

Our experiments show that microalgae grow better on textile fabrics than in common petri dishes:

E. Tanzli, B. Brockhagen, A. Blümel, I. B. Post, T. Bache, K. Tuvshinbayar, S. V. Homburg, A. Ehrmann
Microalgae growth and oxygen production on different textile fabrics
Communications in Development and Assembling of Textile Products 3, 9-16 (2022)

 

2022 - February 21

While mostly working on textile electrodes, here we give an overview of possibilities to measure biosignals with inexpensive single-circuit boards:

G. Ehrmann, T. Blachowicz, S. V. Homburg, and A. Ehrmann
Measuring biosignals with single circuit boards
Bioengineering 9, 84 (2022)

 

2022 - February 13

The final paper based on our MeCC project shows the advantages of sandwiching nanofiber mats between metal sheets during carbonization:

J. L. Storck, M. Wortmann, B. Brockhagen, N. Frese, E. Diestelhorst, T. Grothe, C. Hellert, A. Ehrmann
Comparative Study of Metal Substrates for improved Carbonization of Electrospun PAN Nanofibers
Polymers 14, 721 (2022)

 

2022 - January 28

While we work mostly with needleless electrospinning, our new study of magnetic nanofibers contains also needle-based electrospinning of core-shell nanofibers:

A. Mamun, L. Sabantina, M. Klöcker, A. Heide, T. Blachowicz, A. Ehrmann
Electrospinning nanofiber mats with magnetite nanoparticles using various needle-based techniques
Polymers 14, 533 (2022)

 

2022 - January 18

And again additive manufacturing for space - with unexpected results regarding the dimensional stability and mechanical properties of polymer parts after cyclic high-temperature treatment:

J. L. Storck, G. Ehrmann, J. Uthoff, E. Diestelhorst, T. Blachowicz, A. Ehrmann
Investigating polymeric 3D printed materials under extreme thermal conditions
Materials Futures 1, 015001 (2022)

 

2021 - December 17

Back into space - how can metal additive manufacturing help to build satellites and rockets?

T. Blachowicz, G. Ehrmann, A. Ehrmann
Metal additive manufacturing for satellites and rockets
Applied Sciences 11, 12036 (2021)

 

2021 - December 06/07

Our most recent micromagnetic studies deal with a magnetization reversal asymmetry in a purely ferromagnetic nanoparticle and data transport in coupled bent ferromagnetic nanowires:

A. Ehrmann, T. Blachowicz
Magnetization reversal asymmetry in a structured ferromagnetic nanoparticle with varying shape anisotropy
J. Magn. Magn. Mater. 546, 168929 (2021)

T. Blachowicz, P. Steblinski, J. Grzybowski, A. Ehrmann
Domain wall nucleation, propagation and annihilation in coupled bent ferromagnetic nanofibers with rotating local input fields
J. Magn. Magn. Mater. 546, 168925 (2021)

 

2021 - November 15

Here we report on a low-budget vertical farming system using textiles substrates:

E. Diestelhorst, J. L. Storck, B. Brockhagen, T. Grothe, I. B. Post, T. Bache, R. Korchev, A. Rattenholl, F. Gudermann, A. Ehrmann
Necessary parameters of vertically mounted textile substrates for successful cultivation of cress for low budget vertical farming
Tekstilec 64, 276-285 (2021)

 

2021 - November 11

Combining a clinostat with a magnetic field allows investigating plant germination and growth under conditions of deep space exploration:

T. Blachowicz, A. Ehrmann, M. Malczyk, A. Stasiak, R. Osadnik, R. Paluch, M. Koruszowic, J. Pawlyta, K. Lis, K. Lehrich
Plant growth in microgravity and defined magnetic field
Proc. of International Conference on Electrical, Computer, Communications and Mechatronics Engineering (ICECCME), 1-8 (2021)

 

2021 - October 27

Can MFM be used to investigate electrospun magnetic nanofiber mats? Here we shed light on possible techniques and challenges:

A. Ehrmann, T. Blachowicz
Magnetic force microscopy on nanofibers – limits and possible approaches for randomly oriented nanofiber mats
Magnetochemistry 7, 143 (2021)

 

2021 - October 15

Our recent paper describes which fibrous materials can be used for shielding of cosmic radiation:

T. Blachowicz, A. Ehrmann
Shielding of cosmic radiation by fibrous materials
Fibers 9, 60 (2021)

 

2021 - October 08

The next paper about 3D printed shape memory polymers suggests new lightweight structures:

D. Koske, A. Ehrmann
Advanced infill designs for 3D printed shape-memory components
Micromachines 12, 1225 (2021)

 

2021 - September 29

After diverse previous studies on shape memory polymers, here we investigate the influence of different post-treatments on 3D printed objects:

G. Ehrmann, B. Brockhagen, A. Ehrmann
Shape memory properties of 3D printed cubes from diverse PLA materials with different post-treatments
Technologies 9, 71 (2021)

 

2021 - September 09

Mainly working on bioimpedance in a recent project, here we nevertheless give an overview of measuring diverse biosignals with textile-based sensors:

T. Blachowicz, G. Ehrmann, A. Ehrmann
Textile-based sensors for biosignal detection and monitoring
Sensors 21, 6042 (2021)

 

2021 - September 03

Our new paper deals with a low-cost myoelectric thumb as prosthesis or exoskeleton:

M. Ayvali, I. Wickenkamp, A. Ehrmann
Design, construction and tests of a low-cost myoelectric thumb
Technologies 9, 63 (2021)

 

2021 - August 19

Here we report on a new method to stabilize and carbonize PAN nanofiber mats without destroying the fibers:

J. L. Storck, C. Hellert, B. Brockhagen, M. Wortmann, E. Diestelhorst, N. Frese, T. Grothe, and A. Ehrmann
Metallic Supports Accelerate Carbonization and Improve Morphological Stability of Polyacrylonitrile Nanofibers during Heat Treatment
Materials 14, 4686 (2021)

 

2021 - August 16

A step further from common magnetic nanoparticles to molecular nanomagnets:

T. Blachowicz, A. Ehrmann
New materials and effects in molecular nanomagnets
Applied Sciences 11, 7510 (2021)

 

2021 - August 07

As a part of our new project StereoTex, we investigated the properties of optical elements prepared by stereolithography and other 3D printing techniques:

T. Blachowicz, G. Ehrmann, A. Ehrmann
Optical elements from 3D printed polymers
e-Polymers 21, 549-565 (2021)

 

2021 - August 06

Related to our recent project dealing with microsatellites, here we simulated a docking process by a Digital Twin approach:

M. Jedrzejowski, T. Blachowicz, W. Krafczyk, W. Pyka, O. Tokarczyk, M. Chudy, Z. Sokol and A. Ehrmann
Analysis of the quasi-stability of kinematic parameters for manipulators system during the docking process using the Digital Twin approach
J. Phys. Conf. Series 1950, 012019 (2021)

 

2021 - July 28

And here's the next paper written during the first steps of our new project CellActive:

E. Tanzli, A. Ehrmann
Electrospun Nanofibrous Membranes for Tissue Engineering and Cell Growth
Applied Sciences 11, 6929 (2021)

 

2021 - June 15

Within the scope of our new project CellActive, we are also working on crosslinking nanofiber mats from water-soluble polymers, e.g. gelatin, for tissue engineering:

A. Ehrmann
Non-Toxic Crosslinking of Electrospun Gelatin Nanofibers for Tissue Engineering and Biomedicine—A Review
Polymers 13, 1973 (2021)

 

2021 - June 10

Our recent papers deals with micromagnetic simulations of mixed magnetic materials and Pac-Man shapes:

F.-Z. Bachar, C. Schröder, A. Ehrmann
Magnetization reversal in Pac-Man shaped Fe nanostructures with varying aperture
J. Magn. Magn. Mater, online first (2021)

D. Sudsom, A. Ehrmann
Micromagnetic Simulations of Magnetic Particles Embedded in Magnetic or Non-Magnetic Matrices
Mater. Proc. 4, 80 (2021)

 

2021 - June 09

Today our next study about 3D printing on textile fabrics was published, including a new material suggestion:

J. Störmer, D. Görmer, A. Ehrmann
Influence of washing and thermal post-treatment on the adhesion between 3D-printed TPU and woven fabrics
CDATP 2, 34-39 (2021)

 

2021 - June 04

Our paper is on the cover of pssb:

T. Grothe, T. Böhm, K. Habashy, O. S. Abdullaeva, J. Zablocki, A. Lützen, K. Dedek, M. Schiek, A. Ehrmann
Optical index matching, flexible electrospun substrates for seamless organic photocapacitive sensors
Phys. Status Solidi B, online first, 2000543 (2021)

 

2021 - May 26

Today we report on nanofibers for electrochemical devices as well as for neuro-inspired signal processing and also on ferromagnetic nanodots with varying roughness and symmetry:

S. N. Banitaba, A. Ehrmann
Application of electrospun nanofibers for fabrication of versatile and highly efficient electrochemical devices: A review
Polymers 13, 1741 (2021)

T. Blachowicz, J. Grzybowski, P. Steblinski, A. Ehrmann
Neuro-inspired signal processing in ferromagnetic nanofibers
Biomimetics 6, 32 (2021)

P. Steinmetz, A. Ehrmann
Micromagnetic simulation of round ferromagnetic nanodots with varying roughness and symmetry
Condens. Matter 6, 19 (2021)

 

2021 - May 12

Here we investigate the influence of modified shape anisotropy on magnetic nanodots with identical magneto-crystalline anisotropy:

E. Ömcü, A. Ehrmann
Magnetization reversal in concave iron nano-superellipses
Condens. Matter 6, 17 (2021)

 

2021 - May 04

The optical properties of electrospun nanofiber mats make them suitable as a base for optical stimulation of blind people, integrated into the human eye:

T. Grothe, T. Böhm, K. Habashy, O. S. Abdullaeva, J. Zablocki, A. Lützen, K. Dedek, M. Schiek, A. Ehrmann
Optical index matching, flexible electrospun substrates for seamless organic photocapacitive sensors
Phys. Status Solidi B, online first, 2000543 (2021)

 

2021 - May 03

In our recent review paper, we give an overview of 3D printing with shape memory polymers:

G. Ehrmann, A. Ehrmann
3D Printing of Shape Memory Polymers
Journal of Applied Polymer Science 138, 50847 (2021)

 

2021 - April 16

Designing new infill patterns can help avoid breaking of objects from shape memory polymers under cold deformation:

D. Koske, A. Ehrmann
Infill designs for 3D-printed shape memory objects
Technologies 9, 29 (2021)

 

2021 - April 14

3D printed bumpers, recovered by heat after an accident? The infill orientation defines the possible recovery:

G. Ehrmann, A. Ehrmann
Pressure orientation dependent recovery of 3D-printed PLA objects with varying infill degree
Polymers 13, 1275 (2021)

 

2021 - April 13

Here we report on a pseudo-exchange bias in structured nanomagnets:

J. Detzmeier, K. Königer, A. Ehrmann
Asymmetric Hysteresis Loops and Horizontal Loop Shifts in Purely Ferromagnetic Nanoparticles
Mater. Proc. 4, 13 (2021)

 

2021 - April 11

Here we investigate the influence of a thermal post-treatment on 3D-printed PLA parts as a prerequisite for 4D printed orthoses:

A. Chalgham, I. Wickenkamp, A. Ehrmann
Mechanical properties of FDM printed PLA parts before and after thermal treatment
Polymers 13, 1239 (2021)

 

2021 - March 21

In our latest paper, we show how structured nanomagnets can be used to form hard/soft magnetic areas in a sample, resulting in a pseudo-exchange bias:

J. Detzmeier, K. Königer, T. Blachowicz, A. Ehrmann
Asymmetric hysteresis loops in structured ferromagnetic nanoparticles with hard/soft areas
Nanomaterials 11, 800 (2021)

 

2021 - March 09

Something more mathematical today - here we test whether Hurst exponent calculations can be used to quantitatively investigate AFM images, and whether post-processing the images disturbs the process:

T. Blachowicz, K. Domino, M. Koruszowic, J. Grzybowski, T. Böhm, A. Ehrmann
Statistical analysis of nanofiber mat AFM images by gray-scale-resolved Hurst exponent distributions
Applied Sciences 11, 2436 (2021)

 

2021 - March 01

A good way to start the new month - our recent paper simulating beaded electrospun magnetic nanofibers was just published:

F. Amini, T. Blachowicz, A. Ehrmann
Systematic study of magnetization reversal in beaded fibers from different magnetic materials
J. Magn. Magn. Mater. 529, 167855 (2021)

 

2021 - February 19

Here we report on electrospinning on different conductive and isolating foils and the impact of plasma treatment on the adhesion:

C. Hellert, M. Wortmann, N. Frese, G. Grötsch, C. Cornelißen, A. Ehrmann
Adhesion of Electrospun Poly(acrylonitrile) Nanofibers on Conductive and Isolating Foil Substrates
Coatings 11, 249 (2021)

 

2021 - February 15

The proceedings of the POLCOM 2020 were just published, containing some papers from our group dealing with different aspects of polymers:

M. Wortmann, N. Frese, J. Brikmann, A. Ehrmann, E. Moritzer, B. Hüsgen
Silicone Mold Accuracy in Polyurethane Vacuum Casting
Macromolecular Symposia 395, 2000242 (2021)

C. Hellert, J. L. Storck, T. Grothe, B. Kaltschmidt, A. Hütten, A. Ehrmann
Positioning and aligning electrospun PAN fibers by conductive and dielectric substrate patterns
Macromolecular Symposia 395, 2000213 (2021)

S. Cakar, A. Ehrmann
3D printing with flexible materials – mechanical properties and material fatigue
Macromolecular Symposia 395, 2000203 (2021)

 

2021 - February 11

Our most recent papers deal with textile fabrics as substrates for 3D printing and for vertical farming:

L. Dirkes, J. D. Massanés, R. Böttjer, J. L. Storck , A. Ehrmann
Outdoor vertical farming on textile substrates
IOP Conference Series: Materials Science and Engineering 1031, 012020 (2021)

M. Ayvali, L. Bussieweke, G. Druzinin, M. Korkmaz, A. Ehrmann
3D printing on warp-knitted fabrics
IOP Conference Series: Materials Science and Engineering 1031, 012019 (2021)

 

2021 - February 03

Here we give an overview of the impact of clustering round nanodots on their magnetization reversal processes:

T. Blachowicz, A. Ehrmann
Influence of clustering round magnetic nano-dots on magnetization reversal
J. Phys. Conf. Series 1730, 012034 (2021)

 

2021 - February 01

Going on with basic research in physics, here we present results of embedding hard magnetic nanodots in soft magnetic matrices and vice versa:

D. Sudsom, A. Ehrmann
Micromagnetic simulations of Fe and Ni nanodot arrays surrounded by magnetic or non-magnetic matrices
Nanomaterials 11, 349 (2021)

 

2021 - January 27

In our recent paper, we report on carbonization of nanofibers on metal substrates:

J. L. Storck, B. Brockhagen, T. Grothe, L. Sabantina, B. Kaltschmidt, K. Tuvshinbayar, L. Braun, E. Tanzli, A. Hütten, A. Ehrmann
Stabilization and carbonization of PAN nanofiber mats electrospun on metal substrates
C - Journal of Carbon Research 7, 12 (2021)

 

2021 - January 26

Here you will find the first part of our study recently published in Polymers:

G. Ehrmann, A. Ehrmann
Shape-memory properties of 3D printed PLA structures
Proceedings 69, 6 (2021)

 

2021 - January 22

Back to the roots: Here we give an update about recent developments in exchange bias:

T. Blachowicz, A. Ehrmann
Exchange bias in thin films – an update
Coatings 11, 122 (2021)

 

2021 - January 20

If you are interested in electronic textiles, here you will find a recent overview:

G. Ehrmann, A. Ehrmann
Electronic textiles
Encyclopedia 1, 115-130 (2021)

 

2021 - January 15

Here we report for the first time on MFM measurements on electrospun magnetic nanofiber mats:

R. Weiss, A. Ehrmann
Preliminary report on MFM measurements on magnetic nanofiber mats
Communications in Development and Assembling of Textile Products 2, 1-7 (2021)

 

2021 - January 7

In our recent study on clusters of Fe nanodots, we investigate the influence of tilted magnetic fields on the polarity of vortex cores:

A. Ehrmann, T. Blachowicz
Influence of tilted fields on magnetization reversal in Fe nanodots
Proc. of 2018 IEEE 8th International Conference on “Nanomaterials: Applications & Properties” 1, 01NMM08 (2020)

 

2021 - January 5

PLA is not only a sustainable 3D printing material, but also has interesting shape memory properties:

G. Ehrmann, A. Ehrmann
Investigation of the shape-memory properties of 3D printed PLA structures with different infills
Polymers 13, 164 (2021)

 

2020 - December 22

Here we shed light on possible 3D printing materials for space applications and review single circuit boards for smart textiles:

G. Ehrmann, A. Ehrmann
Suitability of common single circuit boards for sensing and actuating in smart textiles
Communications in Development and Assembling of Textile Products 1, 170-179 (2020)

T. Blachowicz, K. Pajak, P. Recha, A. Ehrmann
3D printing for microsatellites - material requirements and recent developments
AIMS Materials Science 7, 926-938 (2020)

 

2020 - November 27

Today two papers were published, dealing with growth of microalgae and mammalian cells on different substrates:

S. Sölmann, A. Rattenholl, H. Blattner, G. Ehrmann, F. Gudermann, D. Lütkemeyer, A. Ehrmann
Mammalian cell adhesion on different 3D printed polymers with varying sterilization methods and acidic treatment
AIMS Bioengineering 8, 25-35 (2021)

B. Brockhagen, J. L. Storck, T. Grothe, R. Böttjer, A. Ehrmann
Improved growth and harvesting of microalgae Chlorella vulgaris on textile fabrics as 2.5D substrates
AIMS Bioengineering 8, 16-24 (2021)

 

2020 - November 22

In the new textile journal CDATP, we report on the influence of ironing on the adhesion between warp-knitted fabrics and imprinted FDM polymers:

D. Görmer, J. Störmer, A. Ehrmann
The influence of thermal after-treatment on the adhesion of 3D prints on textile fabrics
Communications in Development and Assembling of Textile Products 1, 104-110 (2020)

 

2020 - November 14

Here we report for the first time on a new possibility to investigate textile fabrics by an acoustic method:

K. Tuvshinbayar, A. Ehrmann
Acoustic investigation of textile fabrics
Tekstilec 63, 287-293 (2020)

 

2020 - November 05

In our recent paper, we report on asymmetric hysteresis loops in the exchange bias system Co/CoO well above the blocking temperature:

A. Ehrmann, T. Blachowicz
Asymmetric hysteresis loops in Co thin films
Condens. Matter 5, 71 (2020)

 

2020 - September 28

Here we investigate the impact of the solid content in the spinning solution for wire-based electrospinning of PAN nanofiber mats:

T. Grothe, J. L. Storck, M. Dotter, A. Ehrmann
Impact of solid content in the electrospinning solution on physical and chemical properties of polyacrylonitrile (PAN) nanofibrous mats
Tekstilec 63, 225-232 (2020)

 

2020 - September 25

Combining textile technologies and biotechnology, this time we let marine microalgae grow on diverse textile fabrics and found some of them highly suitable as possible substrates and harvesting support:

S. Sebök, B. Brockhagen, J. L. Storck, I. B. Post, T. Bache, R. Korchev, R. Böttjer, T. Grothe, A. Ehrmann
Growth of marine macroalgae Ectocarpus sp. on various textile substrates
Environmental Technology, online first (2020)

 

2020 - September 07

How reliable are highly magnified micrographs?

M. Wortmann, A. S. Layland, N. Frese, U. Kahmann, T. Grothe, J. L. Storck, T. Blachowicz, J. Grzybowski, B. Hüsgen, A. Ehrmann
On the reliability of highly magnified micrographs for structural analysis in materials science
Sci. Rep. 10, 14708 (2020)

 

2020 - August 25

Here we give an overview of carbon nanofibers and their possible applications:

D. Yadav, F. Amini, A. Ehrmann
Recent advances in carbon nanofibers and their applications – a review
Eur. Polym. J. 138, 109963 (2020)

 

2020 - August 21

Based on our patent, we investigated the thermal stabilization process of PAN nanofiber mats on aluminum substrates further:

J. L. Storck, T. Grothe, K. Tuvshinbayar, E. Diestelhorst, D. Wehlage, B. Brockhagen, M. Wortmann, N. Frese, A. Ehrmann
Stabilization and Incipient Carbonization of Electrospun Polyacrylonitrile Nanofibers Fixated on Aluminum Substrates
Fibers 8, 55 (2020)

 

2020 - August 04

Mixing magnetic materials in nanomagnets may support stable single-vortex formation for data storage applications:

D. Sudsom, T. Blachowicz, L. Hahn, A. Ehrmann
Vortex nucleation and propagation in magnetic double-wedges and semi-squares for reliable quaternary storage systems
J. Magn. Magn. Mater. 514, 167294 (2020)

 

2020 - June 21

Here we report on a comprehensive investigation of PAN/PVDF electrospun nanofiber mat:

M. Wortmann, N. Frese, A. Mamun, M. Trabelsi, W. Keil, B. Büker, A. Javed, M. Tiemann, E. Moritzer, A. Ehrmann, A. Hütten, C. Schmidt, A. Gölzhäuser, B. Hüsgen, L. Sabantina
Chemical and morphological transition of poly(acrylonitrile) / poly(vinylidene fluoride) blend nanofibers during oxidative stabilization and incipient carbonization
Nanomaterials 10, 1210 (2020)

 

2020 - May 30

Finishing our project on neuromorphic computing with electrospun magnetic nanofiber mats, here we give a general overview of magnetic elements usable for this topic:

T. Blachowicz, A. Ehrmann
Magnetic elements for neuromorphic computing
Molecules 25, 2550 (2020)

 

2020 - May 29

After we investigated possibilities to evaluate microscopic images of different textile structures by random walks in previous studies, here we report on first results of multi-level random walks on AFM images of electrospun nanofiber mats:

T. Blachowicz, T. Böhm, J. Grzybowski, K. Domino, A. Ehrmann
Analysis of AFM images of nanofibre mats for automated processing
Tekstilec 63, 104-112 (2020)

 

2020 - April 20

As the start of my recent special issue, here we report on 3D-printed MEMS technology:

T. Blachowicz, A. Ehrmann
3D printed MEMS technology – recent developments and applications
Micromachines 11, 434 (2020)

 

2020 - April 12

Again magnetization reversal in electrospun magnetic nanofiber mats, this time treated by micromagnetic simulations:

T. Blachowicz, C. Döpke, A. Ehrmann
Micromagnetic simulations of chaotic ferromagnetic nanofiber networks
Nanomaterials 10, 738 (2020)

 

2020 - March 27

Our latest paper deals with magnetization reversal in electrospun nanofiber mats with embedded magnetic nanoparticles:

N. Fokin, T. Grothe, A. Mamun, M. Trabelsi, M. Klöcker, L. Sabantina, C. Döpke, T. Blachowicz, A. Hütten, A. Ehrmann
Magnetic Properties of Electrospun Magnetic Nanofiber Mats After Stabilization and Carbonization
Materials 13, 1552 (2020)

 

2020 - March 23

Magnetic nanoparticles with different hexagonal shapes can show different magnetization reversal processes, including some that are suitable for quarternary storage devices:

N. Dang Xuan, C. Döpke, T. Blachowicz, A. Ehrmann
Magnetization Reversal in Hexagonal Nanomagnets
Act. Phys. Pol. 137, 395-403 (2020)

 

2020 - March 16

After preparing new nanofiber mats from different polymer blends, here we report on cell growth results on them:

D. Wehlage, H. Blattner, A. Mamun, I. Kutzli, E. Diestelhorst, A. Rattenholl, F. Gudermann, D. Lütkemeyer and A. Ehrmann
Cell growth on electrospun nanofiber mats from polyacrylonitrile (PAN) blends
AIMS Bioengineering 7, 43-54 (2020)

 

2020 - March 13

Here we give an overview of recent research on 3D printing on textile fabrics ... and some suggestions how to go on with this topic:

T. Kozior, T. Blachowicz, and A. Ehrmann
Adhesion of 3D printing on textile fabrics – inspiration from and for other research areas
Journal of Engineered Fibers and Fabrics 15, 1558925020910875 (2020)

 

2020 - March 05

Our next paper marks the starting point of a new project, combining textile technologies with robotics:

W. Pyka, M. Jedrzejowski, M. Chudy, W. Krafczyk, O. Tokarczyk, M. Dziezok, A. Bzymek, S. Bysko, T. Blachowicz, and A. Ehrmann
On the use of textile materials in robotics
Journal of Engineered Fibers and Fabrics 15, 1558925020910725 (2020)

 

2020 - March 03

After working on different quantum dots long time ago and working on solar cells now for several years, here we review recent research on PbS quantum dots in various solar cell types:

T. Blachowicz and A. Ehrmann
Recent Developments of Solar Cells from PbS Colloidal Quantum Dots
Applied Sciences 10, 1743 (2020)

 

2020 - February 26

Today our first study on PAN/casein nanofiber mats was published:

E. Diestelhorst, F. Mance, A. Mamun, A. Ehrmann
Chemical and morphological modification of PAN nanofibrous mats with addition of casein after electrospinning, stabilization and carbonization
Tekstilec 63, 38-49 (2020)

 

2020 - February 14

Our next paper deals with a problem of measurement science:

T. Kreisel, B. Froböse, A. Ehrmann
Influence and stabilization of environmental conditions on teraohmmeter measurements of textile materials
Journal of Engineered Fibers and Fabrics 15, 1558925020906568 (2020)

 

2020 - February 03

Today directly two recent review papers dealing with different aspects of electrospun nanofiber mats were published:

T. Blachowicz, A. Ehrmann
Most recent developments in electrospun magnetic nanofibers: A review
Journal of Engineered Fibers and Fabrics 15, 1558925019900843 (2020)

T. Blachowicz, A. Ehrmann
Recent developments in electrospun ZnO nanofibers: A short review
Journal of Engineered Fibers and Fabrics 15, 1558925019899682 (2020)

 

2020 - January 12

Here we report on vortices on magnetic double-bow-tie structures:

D. Sudsom, I. Juhász Junger, C. Döpke, T. Blachowicz, L. Hahn, A. Ehrmann
Micromagnetic simulation of vortex development in magnetic bi-material bow-tie structures
Condensed Matter 5, 5 (2020)

 

2019 - December 31

What a good ending of the year - our new review paper on conductive nanofiber mats was published:

T. Blachowicz, A. Ehrmann
Conductive electrospun nanofiber mats
Materials 13, 152 (2020)

 

2019 - December 23

The adhesion between a textile fabric and a 3D imprinted object can be modified by a polymer coating on the fabric prior to printing:

P. Meyer, C. Döpke, A. Ehrmann
Improving adhesion of 3D printed objects on textile fabrics by polymer coating
Journal of Engineered Fibers and Fabrics 14, 1558925019895257 (2019)

 

2019 - December 20

In our recent paper, we suggest a new possibility to prepare oriented nanofibers by electrospinning on partly conductive substrates:

J. L. Storck, T. Grothe, A. Mamun, L. Sabantina, M. Klöcker, T. Blachowicz, A. Ehrmann
Orientation of electrospun magnetic nanofibers near conductive areas
Materials 13, 47 (2020)

 

2019 - December 18

Drying of nanofiber mats and film formation can be investigated spectroscopically:

E. Kerker, D. Steinhäußer, A. Mamun, M. Trabelsi, J. Fiedler, L. Sabantina, I. Juhász Junger, M. Schiek, A. Ehrmann, R. Kaschuba
Spectroscopic Investigation of Highly-Scattering Nanofiber Mats during Drying and Film Formation
Optik - International Journal for Light and Electron Optics, online first (2019)

 

2019 - December 13

Elongated iron nanodots show dimension-dependent magnetization reversal processes:

D. Sudsom, C. Döpke, T. Blachowicz, A. Ehrmann
Micromagnetic simulation of thickness-dependent magnetization reversal processes in elongated iron nanodots
Journal of Physics: Conference Series 1391, 012126 (2019)

 

2019 - December 11

And again 3D printing, this time concentrating on possible aftertreatments of PLA:

T. Kozior, A. Mamun, M. Trabelsi, L. Sabantina, A. Ehrmann
Quality of the surface texture and mechanical properties of FDM printed samples after thermal and chemical treatment
Strojniški vestnik - Journal of Mechanical Engineering 66, 105-113 (2020)

 

2019 - December 08

While we have recently investigated the possibility of 3D printing on an electrospun nanofiber mat, here we show the opposite process of electrospinning on different 3D printed materials:

T. Kozior, A. Mamun, M. Trabelsi, M. Wortmann, L. Sabantina, A. Ehrmann
Electrospinning on 3D Printed Polymers for Mechanically Stabilized Filter Composites
Polymers 11, 2034 (2019)

 

2019 - November 30

Our newest paper discusses the influence of a surfactant on the semiconducting layer in DSSCs as well as the impact of the cell size on the efficiency:

S. Udomrungkhajornchai, I. Juhász Junger, A. Ehrmann
Optimization of the TiO2 layer in DSSCs by a nonionic surfactant
Optik - International Journal for Light and Electron Optics 203, 163945 (2020)

 

2019 - November 30

More than 16 months after acceptance, our paper on electrospinning PAN on different substrates is finally published:

F. Beermann, M. Schwakenberg, A.-L. Voigt, A. Ehrmann
Influence of Substrate Materials on Electrospun PAN Nanofiber Mats
Proc. of 2018 IEEE 8th International Conference on “Nanomaterials: Applications & Properties” 3, 03TFNMC27 (2019)

 

2019 - November 21

A fully electrospun DSSC is described in our most recent paper:

S. Kohn, D. Wehlage, I. Juhász Junger, A. Ehrmann
Electrospinning a dye-sensitized solar cell
Catalysts 9, 975 (2019)

 

2019 - November 17

In our recent paper, we describe the increase mechanical properties of carbonized PAN/ZnO nanofiber mats, as compared with pure PAN:

M. Trabelsi, A. Mamun, M. Klöcker, L. Sabantina, C. Großerhode, T. Blachowicz, A. Ehrmann
Increased mechanical properties of carbon nanofiber mats for possible medical applications
Fibers 7, 98 (2019)

 

2019 - November 13

The development of a new electrolyte with enhanced long-term stability for DSSCs is described here:

K. Gossen, A. Ehrmann
Glycerin-based electrolyte for reduced drying of dye-sensitized solar cells
Optik - International Journal for Light and Electron Optics, online first (2019)

 

2019 - October 23

Now the first report on knitted fabrics as possible substrates for hydroponic systems is also published:

J.-L. Storck, R. Böttjer, D. Vahle, B. Brockhagen, T. Grothe, K.-J. Dietz, A. Rattenholl, F. Gudermann, A. Ehrmann
Seed germination and seedling growth on knitted fabrics as new substrates for hydroponic systems
Horticulturae 5, 73 (2019)

 

2019 - October 10

Here we report for the first time on 3D printing with the FDM process on electrospun nanofiber mats:

T. Kozior, M. Trabelsi, A. Mamun, L. Sabantina, A. Ehrmann
Stabilization of Electrospun Nanofiber Mats Used for Filters by 3D Printing
Polymers 11, 1618 (2019)

 

2019 - September 12

The first report on vertical farming on vertically mounted textile fabrics is published:

R. Böttjer, J. L. Storck, D. Vahle, B. Brockhagen, T. Grothe, S. Herbst, K.-J. Dietz, A. Rattenholl, F. Gudermann, A. Ehrmann
Influence of textile and environmental parameters on plant growth on vertically mounted knitted fabrics
Tekstilec 62, 200-207 (2019)

 

2019 - August 22

How can the low pH values necessary for good anthocyanin performance in DSSCs be avoided?

I. Juhász Junger, S. Udomrungkhajornchai, N. Grimmelsmann, T. Blachowicz, A. Ehrmann
Effect of caffeine copigmentation of anthocyanin dyes on the DSSC efficiency
Materials 12, 2692 (2019)

 

2019 - August 18

One step further to textile-based solar cells:

S. Müller, D. Wieschollek, I. Juhász Junger, E. Schwenzfeier-Hellkamp, A. Ehrmann
Back electrodes of dye-sensitized solar cells on textile fabrics
Optik - International Journal for Light and Electron Optics 198, 163243 (2019)

 

2019 - August 13

Here we describe how to detect different natural and even man-made fibers unambiguously by laser diffraction patterns:

A. Dörfert, H. Spexard, A. Al-Manadili, A. Housin, D. Steinhäußer, J. Fiedler, A. Ehrmann, R. Kaschuba
Laser diffraction images for determination of natural and man-made fibers
Optik - International Journal for Light and Electron Optics 197, 163212 (2019)

 

2019 - July 20

In our recent paper, we have investigated whether square cobalt nano-frames offer new possibilities to create quaternary of higher-order storage devices for new hard disk architectures:

T. Blachowicz, D. Kosmalska, C. Döpke, H. Leiste, L. Hahn, A. Ehrmann
Varying steps in hysteresis loops of Co square nano-frames
J. Magn. Magn. Mater. 491, 165619 (2019)

 

2019 - July 15

Letting the edible mushroom Pleurotus ostreatus grow on knitted fabrics works different from nanofiber mats as substrates:

J. Helberg, M. Klöcker, L. Sabantina, J. L. Storck, R. Böttjer, B. Brockhagen, F. Kinzel, A. Rattenholl, A. Ehrmann
Growth of Pleurotus ostreatus on different textile materials for vertical farming
Materials 12, 2270 (2019)

 

2019 - July 9

Adding TiO2 to electrospun PAN nanofibers can be challenging, but also supportive for maintaining the morphology during carbonization:

L. Sabantina, R. Böttjer, D. Wehlage, T. Grothe, M. Klöcker, F. J. García Mateos, J. Rodríguez-Mirasol, T. Cordero, A. Ehrmann
Morphological study of stabilization and carbonization of PAN/TiO2 nanofiber mats
Journal of Engineered Fibers and Fabrics 14, 1558925019862242 (2019)

 

2019 - July 4

In our recent paper we report on a possibility to use TiO2 in DSSCs without sintering:

A. Mamun, M. Trabelsi, M. Klöcker, L. Sabantina, C. Großerhode, T. Blachowicz, G. Grötsch, C. Cornelißen, A. Streitenberger, A. Ehrmann
Electrospun nanofiber mats with embedded non-sintered TiO2 for dye-sensitized solar cells (DSSCs)
Fibers 7, 60 (2019)

 

2019 - May 6

Our new book reports on recent advances in spintronics:

T. Blachowicz and A. Ehrmann
Spintronics - Theory, Modelling, Devices
De Gryter, ISBN 978-3-11-049063-3 (e-book) / 978-3-11-049062-6 (print), 2019

 

2019 - May 1

Colored light sources strongly modify the efficiency of DSSCs:

A. Ahmedi, A. Wiens, I. Juhász Junger, D. Werner, E. Schwenzfeier-Hellkamp, A. Ehrmann
Influence of grey and color filters on the electrical properties of the dye-sensitized solar cells
Optik - International Journal for Light and Electron Optics 186, 309-314 (2019)

 

2019 - April 15

Sterilization of electrospun nanofiber mats needs special techniques which strongly influence the growth of animal cells on them:

D. Wehlage, H. Blattner, L. Sabantina, R. Böttjer, T. Grothe, A. Rattenholl, F. Gudermann, D. Lütkemeyer, A. Ehrmann
Sterilization of PAN/Gelatin Nanofibrous Mats for Cell Growth
Tekstilec 62, 78-88 (2019)

 

2019 - March 30

Magnetic Fibonacci nano-spirals as a new possibility to store data:

P. Kern, C. Döpke, T. Blachowicz, P. Steblinski, A. Ehrmann
Magnetization reversal in ferromagnetic Fibonacci nano-spirals
J. Magn. Magn. Mater. 484, 37-41 (2019)

 

2019 - March 28

In our latest review, we give an overview of interesting new materials for textile-based DSSCs:

A. Ehrmann, T. Blachowicz
Recent coating materials for textile-based solar cells
AIMS Materials Science 6, 234-251 (2019)

 

2019 - March 27

A large study on teas as possible dyes for DSSCs was performed on specialized conductive foils:

S. Kohn, C. Großerhode, J. L. Storck, G. Grötsch, C. Cornelißen, A. Streitenberger, C. Grassmann, A. Schwarz-Pfeiffer, A. Ehrmann
Commercially available teas as possible dyes for dye-sensitized solar cells
Optik - International Journal for Light and Electron Optics 185, 178-182 (2019)

 

2019 - March 22

Mushroom mycelium changes its morphology when growing on nanofiber mats:

L. Sabantina, F. Kinzel, T. Hauser, A. Többer, M. Klöcker, C. Döpke, R. Böttjer, D. Wehlage, A. Rattenholl, A. Ehrmann
Comparative study of Pleurotus ostreatus mushroom grown on modified PAN nanofiber mats
Nanomaterials 9, 475 (2019)

 

2019 - March 12

Our new paper on the physical properties of bandages predicts the sub-bandage pressure during compression therapy:

F. Tamoue, A. Ehrmann, T. Blachowicz
Predictability of sub-bandage pressure in compression therapy based on material properties
Textile Research Journal 89, 4410-4424 (2019)

 

2019 - February 20

Quite a new topic for us and unexpectedly also for other research groups: vertical farming on textile fabrics. Some first ideas are given here:

A. Ehrmann
On the possible use of textile fabrics for vertical farming
Tekstilec 62, 34-41 (2919)

 

2019 - February 15

Wet relaxation of nanofiber mats was investigated for the first time by our group, with unexpected results:

T. Grothe, L. Sabantina, M. Klöcker, I. Juhász Junger, C. Döpke and A. Ehrmann
Wet relaxation of electrospun nanofiber mats
Technologies 7, 23 (2019)

 

2019 - February 13

Our most recent article investigates the influence of a usually ignored factor on DSSC performance:

K. Gossen, A. Ehrmann
Influence of FTO glass cleaning on DSSC performance
Optik - International Journal for Light and Electron Optics 183, 253-256 (2019)

 

2019 - January 16

Here we report for the first time on stabilization for carbonization of PAN nanofiber mats needleless electrospun from DMSO:

L. Sabantina, M. Klöcker, M. Wortmann, J. Rodríguez-Mirasol, T. Cordero, E. Moritzer, K. Finsterbusch, A. Ehrmann
Stabilization of PAN nanofiber mats obtained by needleless electrospinning using DMSO as solvent
Journal of Industrial Textiles, online first (2019)

 

2019 - January 15

Electrospinning allows for preparing a broad spectrum of nanofiber mats to nanomembranes with significantly varying water vapor permeability:

L. Sabantina, L. Hes, J. Rodríguez-Mirasol, T. Cordero and A. Ehrmann
Water vapor permeability through PAN nanofiber mat with varying membrane-like areas
FIBRES & TEXTILES in Eastern Europe 133, 12-15 (2019)

 

2019 - January 12

In a recent project we examine possibilities to create magnetic nanofiber mats and use them for data storage:

C. Döpke, T. Grothe, P. Steblinski, M. Klöcker, L. Sabantina, D. Kosmalska, T. Blachowicz, A. Ehrmann
Magnetic nanofiber mats for data storage and transfer
Nanomaterials 9, 92 (2019)

 

2019 - January 02

Electrospinning is often performed from highly toxic or corrosive solvents, so low-toxic solvents are highly interesting:

M. Wortmann, N. Freese, L. Sabantina, R. Petkau, F. Kinzel, A. Gölzhäuser, E. Moritzer, B. Hüsgen, A. Ehrmann
New Polymers for Needleless Electrospinning from Low-toxic Solvents
Nanomaterials 9, 52 (2019)

 

2018 - December 19

Using natural dyes on textile fabrics is a challenge, but enables interesting optical effects:

A. Fröse, K. Schmidtke, T. Sukmann, I. Juhász Junger, A. Ehrmann
Application of natural dyes on diverse textile materials
Optik - International Journal for Light and Electron Optics 181, 215-219 (2011)

 

2018 - December 10

Again new results of micromagnetic simulations, this time showing different double-vortex states in circular nanodots:

A. Ehrmann, T. Blachowicz
Vortex and double-vortex nucleation during magnetization reversal in Fe nanodots of different dimensions
J. Magn. Magn Mater. 475, 727-733 (2019)

 

2018 - December 07

In our latest paper, we investigate the adhesion of 3D printed objects especially on textile fabrics used for garments:

T. Spahiu, M. Al-Arabiyat, Y. Martens, A. Ehrmann, E. Piperi and E. Shehi
Adhesion of 3D printing polymers on textile fabrics for garment production
IOP Conf. Ser.: Mater. Sci. Eng. 459 , 012065 (2018)

 

2018 - December 01

Our next paper on dye-sensitized solar cells investigates Aloe vera gel as a possible dye:

K. Gossen, J. L. Storck, A. Ehrmann
Influence of solvents on Aloe vera gel performance in dye-sensitized solar cells
Optik - International Journal for Light and Electron Optics 180, 615-618 (2018)

 

2018 - November 06

Two new papers were published today, dealing with nanomagnetism and dye-sensitized solar cells:

A. Ehrmann, T. Blachowicz
Systematic study of magnetization reversal in square Fe nanodots of varying dimensions in different orientations
Hyperfine Interactions 239, 8 (2018)

B. Bohnenkamp, J.-H. Linnemann, I. Juhász Junger, E. Schwenzfeier-Hellkamp, A. Ehrmann
Influence of different solvents on the electrical properties of dye-sensitized solar cells
Journal of Renewable and Sustainable Energy 10, 063701 (2018)

 

2018 - October 30

A new method is suggested to increase the adhesion of 3D printed objects on textile fabrics:

L. Unger, M. Scheideler, P. Meyer, J. Harland, A. Görzen, M. Wortmann, A. Dreyer, A. Ehrmann
Increasing Adhesion of 3D Printing on Textile Fabrics by Polymer Coating
Tekstilec 61, 265-271 (2018)

 

2018 - October 23

The different methods to coat DSSC counter electrodes with graphite were investigated - with the unexpected finding that a typical textile method works best:

F. Hölscher, P.-R. Trümper, I. Juhász Junger, E. Schwenzfeier-Hellkamp, A. Ehrmann
Application Methods for Graphite as Catalyzer in Dye-Sensitized Solar Cells
Optik - International Journal for Light and Electron Optics 178, 1276-1279 (2018)

 

2018 - October 12

Have you ever wondered whether the holes from acid splashes in your lab coat could be avoided? We have investigated whether a hydrophobic finishing would help:

E. Hilenberg, E. Taskin, A. Ehrmann
Increased acid-resistance of lab-coats by hydrophobic finishing
International Journal of Clothing Science and Technology 30, 784-789 (2018)

 

2018 - October 06

Efficiencies of Dye-sensitized solar cells are often given erroneously too large, a problem addressed in our recent comment:

A. Ehrmann, T. Blachowicz
Comment on ‘Dye-sensitized solar cells using Aloe Vera and Cladode of Cactus extracts as natural sensitizers’ [Chem. Phys. Lett. 679 (2017) 97-101]
Chem. Phys. Lett., online first (2018)

 

2018 - September 26

Using micromagnetic simulations, we have investigated the bending radius influence of the magnetic properties of nanofibers which could be used for neuromorphic computing:

T. Blachowicz, A. Ehrmann
Magnetization reversal in bent nanofibers of different cross-sections
J. Appl. Phys. 124, 152112 (2018)

 

2018 - September 25

The influence of different light conditions on the performance of DSSCs is subject of our recent paper:

I. Juhász Junger, D. Werner, E. Schwenzfeier-Hellkamp, A. Ehrmann
Influence of illumination spectra on DSSC performance
Optik - International Journal for Light and Electron Optics, 177, 8-12 (2018)

 

2018 - September 20

Our new paper reports on investigations of ultrasonic welding as a possible joining process for nanofiber mats:

E. Wirth, L. Sabantina, M. O. Weber, K. Finsterbusch, A. Ehrmann
Preliminary study of ultrasonic welding as a joining process for electrospun nanofiber mats
Nanomaterials 8, 746 (2018)

 

2018 - September 04

In our recent paper, we report on electrospun nanofiber mats as counter-electrodes for DSSCs:

I. Juhász Junger, D. Wehlage, R. Böttjer, T. Grothe, L. Juhász, C. Grassmann, T. Blachowicz and A. Ehrmann
Dye-sensitized solar cells with electrospun nanofiber mat-based counter electrodes
Materials 11, 1604 (2018)

 

2018 - August 30

Our next article reports on the stabilization of electrospun nanofibers from PAN/gelatin blends:

L. Sabantina, D. Wehlage, M. Klöcker, A. Mamun, T. Grothe, F. J. García-Mateos, J. Rodríguez-Mirasol, T. Cordero, K. Finsterbusch, A. Ehrmann
Stabilization of electrospun PAN/gelatin nanofiber mats for carbonization
Journal of Nanomaterials 2018, 6131085 (2018)

 

2018 - August 17

Different graphite coating methods of DSSC counter electrodes are compared in our most recent paper:

I. Juhász Junger, C. Großerhode, J. L. Storck, S. Kohn, T. Grethe, C. Grassmann, A. Schwarz-Pfeiffer, N. Grimmelsmann, H. Meissner, T. Blachowicz, and A. Ehrmann
Influence of graphite-coating methods on the DSSC performance
Optik - International Journal for Light and Electron Optics, online first (2018)

 

2018 - August 09

Our new article reports on textile pretreatments to increase the adhesion of 3D printed objects:

T. Kozior, C. Döpke, N. Grimmelsmann, I. Juhász Junger, and A. Ehrmann
Influence of fabric pretreatment on adhesion of 3D printed material on textile substrates
Advances in Mechanical Engineering 10, 1687814018792316 (2018)

 

2018 - August 03

Our recent paper suggests a new method to test the abrasion of motorcycle protective clothing:

N. Bollschweiler, S. Marzen, A. Ehrmann
New Method to Measure Abrasion of Motorcyclist Protective Clothing
Tekstilec 61, 152-161 (2018)

 

2018 - July 30

A new way to increase abrasion resistance of textile fabrics is described in our next article:

M. Wortmann, N. Frese, L. Hes, A. Gölzhäuser, E. Moritzer, A. Ehrmann
Improved abrasion resistance of textile fabrics due to polymer coatings
Journal of Industrial Textiles 49, 572-583 (2019)

 

2018 - July 04

Our latest article shows a new method to stabilize PAN nanofiber mats without morphological changes and additionally to create carbon/metal composites in a novel way:

L. Sabantina, M. Ángel Rodríguez-Cano, M. Klöcker, F. J. García-Mateos, J. J. Ternero-Hidalgo, A. Mamun, F. Beermann, M. Schwakenberg, A.-L. Voigt, J. Rodríguez Mirasol, T. Cordero, A. Ehrmann
Fixing PAN nanofiber mats during stabilization for carbonization and creating novel metal/carbon composites
Polymers 10, 735 (2018)

 

2018 - June 26

Partially waterproof electrospun biopolymer nanofibers and nano-coatings with novel morphologies:

J. Banner, M. Dautzenberg, T. Feldhans, J. Hofmann, P. Plümer, A. Ehrmann
Water Resistance and Morphology of Electrospun Gelatine Blended with Citric Acid and Coconut Oil
Tekstilec 61, 129-135 (2018)

 

2018 - June 19

Our latest article reports on a new conductive coating:

D. Vahle, R. Böttjer, K. Heyden, A. Ehrmann
Conductive polyacrylonitrile/graphite textile coatings
AIMS Materials Science 5, 551-558 (2018)

 

2018 - May 15

My new article about teaching textile technologies to non-textile engineering students was just published:

A. Ehrmann
Teaching textile technologies for non-textile engineers
eLearning & Software for Education 2018(3), 154-157 (2018)

 

2018 - April 30

A patent was granted:

T. Blachowicz, A. Ehrmann
Sposób wykonania i przemagnesowania ultracienkich komórek ferromagnetycznych tworzących macierz dwubitowych, czterostanowych komórek pamięci magnetycznej
A method of preparation and demagnetization of ultrathin ferromagnetic cells creating a matrix of two-bits, four-states magnetic memory cells
Patent application PL000000405487A1, 30-09-2013, PL 228717 B1, 30-04-2018

 

2018 - April 24

Our new paper depicts the influence of spinning parameters on needleless electrospun nanofiber mats:

L. Sabantina, J. R. Mirasol, T. Cordero, K. Finsterbusch, and A. Ehrmann
Investigation of Needleless Electrospun PAN Nanofiber Mats
AIP Conference Series 1952, 020085 (2018)

 

2018 - April 22

The next article deals with the dyes used in DSSCs:

B. Bohnenkamp, J.-H. Linnemann, I. Juhász Junger, E. Schwenzfeier-Hellkamp, A. Ehrmann
Influence of dyes and dying process parameters on the electrical properties of dye-sensitized solar cells
Optik – International Journal for Light and Electron Optics 168, 282-286 (2018)

 

2018 - March 19

Our recent research about typical materials for textile-based batteries has been published:

R. Resuli, I. Turhan, A. Ehrmann, T. Blachowicz
Textile-based batteries with nanofiber interlayer
AIMS Energy 6, 261-268 (2018)

 

2018 - March 08

The results of an earlier project to investigate the washing resistance of PU-based conductive coatings are now published:

P. Schäl, I. Juhász Junger, N. Grimmelsmann, A. Ehrmann
Development of graphite-based conductive textile coatings
Journal of Coatings Technology and Research, online first (2018)

 

2018 - March 08

In our latest article we examine the effect of electrospinning blends from water-resistent and water-soluble polymers:

D. Wehlage, R. Böttjer, T. Grothe, A. Ehrmann
Electrospinning water-soluble/insoluble polymer blends
AIMS Materials Science 5, 190-200 (2018)

 

2018 - February 23

Our most recent article deals with the influence of salts on the electrospinnability of PEG solutions:

T. Blomberg, N. Borgmeier, L. T. Kramer, P. Witzke, T. Grothe and A. Ehrmann
Influence of Salts on the Spinnability of Poly(ethylene glycol)
Advances in Engineering Research 878, 313-317 (2018)

 

2018 - February 08

In the next article about dye-sensitized solar cells, we examine possibilities to increase reproducibility in lab experiments:

F. Hölscher, P.-R. Trümper, I. Juhász Junger, E. Schwenzfeier-Hellkamp, A. Ehrmann
Raising Reproducibility in Dye-Sensitized Solar Cells under Laboratory Conditions
Journal of Renewable and Sustainable Energy 10, 013506 (2018)

 

2018 - February 08

Finally, our paper about increasing the adhesion between textile fabrics and imprinted 3D materials is published:

N. Grimmelsmann, M. Lutz, M. Korger, H. Meissner, A. Ehrmann
Adhesion of 3D printed material on textile substrates
Rapid Prototyping Journal 24, 166-170 (2018)

 

2018 - February 02

Our new article investigates the influence of refilling on the longevity of dye-sensitized solar cells:

I. Juhász Junger, A. Tellioglu, A. Ehrmann
Refilling DSSCs as a method to ensure longevity
Optik – International Journal for Light and Electron Optics, online first (2018)

 

2017 - December 01

Two papers about our main research areas have just been published:

N. Grimmelsmann, M. Lutz, M. Korger, H. Meissner, A. Ehrmann
Adhesion of 3D printed material on textile substrates
Rapid Prototyping Journal, online first (2017)

T. Grothe, D. Wehlage, T. Böhm, A. Remche, A. Ehrmann
Needleless Electrospinning of PAN Nanofibre Mats
Tekstilec 60, 290-295 (2017)

 

2017 - November 25

In our recent article, we examine an unusual anisotropy in the exchange bias system Co/CoO:

A. Ehrmann, T. Blachowicz
Angle and rotational direction dependent horizontal loop shift in epitaxial Co/CoO bilayers on MgO(100)
AIP Advances 7, 115223 (2017)

 

2017 - November 25

The proceedings of the Nanoconference 2017 in Dortmund/Germany are finally published and contain two papers of our research group about different topics:

T. Grothe, N. Grimmelsmann, S. V. Homburg, A. Ehrmann
Possible applications of nano-spun fabrics and materials
Elsevier Materials Today: Proceedings 4, S154–S159 (2017)

T. Blachowicz, A. Ehrmann
Square nano-magnets as bit-patterned media with doubled possible data density
Elsevier Materials Today: Proceedings 4, S226-S231 (2017)

 

2017 - November 22

A comprehensive study about needleless electrospinning of PEG has been published:

T. Grothe, J. Brikmann, H. Meissner, A. Ehrmann
Influence of Solution and Spinning Parameters on Nanofiber Mat Creation of Poly(ethylene oxide) by Needleless Electrospinning
Materials Science 23, 342-349 (2017)

 

2017 - November 09

In the proceedings of the AUTEX conference, four papers of our textile research group are published:

M. C. Bier, S. Kohn, A. Stierand, N. Grimmelsmann, S. V. Homburg, A. Rattenholl, and A. Ehrmann
Investigation of eco-friendly casein fibre production methods
IOP Conference Series: Materials Science and Engineering 254, 192004 (2017)

T. Spahiu, S. Fafenrot, N. Grimmelsmann, E. Piperi, E. Shehi and A. Ehrmann
Varying fabric drape by 3D-imprinted patterns for garment design
IOP Conference Series: Materials Science and Engineering 254, 172023 (2017)

N. Grimmelsmann, T. Grothe, S. V. Homburg, A. Ehrmann
Electrospinning and stabilization of chitosan nanofiber mats
IOP Conference Series: Materials Science and Engineering 254, 102006 (2017)

M. Normann, T. Grethe, K. Zöll, A. Ehrmann, A. Schwarz-Pfeiffer
Development of 2D and 3D structured textile batteries processing conductive material with Tailored Fiber Placement (TFP)
IOP Conference Series: Materials Science and Engineering 254, 072016 (2017)

 

2017 - October 19

In our recent article we discuss the mechanical properties of FDM printed polymer-metal blends:

S. Fafenrot, N. Grimmelsmann, M. Wortmann and A. Ehrmann
Three-Dimensional (3D) Printing of Polymer-Metal Hybrid Materials by Fused Deposition Modeling
Materials 10, 1199 (2017)

 

2017 - October 16

Our new paper about magnetization reversal mechanisms in fourfold nanorings has just been published:

A. Ehrmann, T. Blachowicz
Magnetization reversal in ferromagnetic nano-rings of fourfold symmetries
Advances in Materials Science and Engineering 2017, 3149682 (2017)

 

2017 - September 08

Two new articles have just been published, dealing with the topics recently focused in our lab - 3D printing combined with textiles, and electrospinning biopolymers:

N. Grimmelsmann, S. V. Homburg, A. Ehrmann
Needleless electrospinning of pure and blended chitosan
IOP Conference Series: Materials Science and Engineering 225, 012098 (2017)

Y. Martens, A. Ehrmann
Composites of 3D-printed polymers and textile fabrics
IOP Conference Series: Materials Science and Engineering 225, 012292 (2017)

 

2017 - August 20

Our recent article examines the influence of the inter-particle distance in magnetic clusters:

A. Ehrmann, T. Blachowicz
Influence of the distance between nanoparticles in clusters on the magnetization reversal process
Journal of Nanomaterials 2017, 5046076 (2017)

 

2017 - August 10

In our new article we discuss the mechanics of elastic and inelastic compression textiles:

F. Tamoue, A. Ehrmann
First principle study: parametric investigation of the mechanics of elastic and inelastic textile materials for the determination of the compression therapy efficacy
Textile Research Journal 88, 2506-2515 (2018)

 

2017 - August 09

An insight in needleless electrospinning of PEO nanofiber mats is given in our next article:

T. Grothe, C. Großerhode, T. Hauser, P. Kern, K. Stute, A. Ehrmann
Needleless electrospinning of PEO nanofiber mats
Advances in Engineering Research 102, 54-58 (2017)

 

2017 - August 01

In our latest article, we discuss the possibility to use nanofiber mats for algae growth or as biotechnological filters:

C. Großerhode, D. Wehlage, T. Grothe, N. Grimmelsmann, S. Fuchs, J. Hartmann, P. Mazur, V. Reschke, H. Siemens, A. Rattenholl, S. V. Homburg, and A. Ehrmann
Investigation of microalgae growth on electrospun nanofiber mats
AIMS Bioengineering 4, 376-385 (2017)

 

2017 - July 07

Our next paper about electrospinning of chitosan blends has been published:

N. Grimmelsmann, S. V. Homburg, A. Ehrmann
Electrospinning chitosan blends for nonwovens with morphologies between nanofiber mat and membrane
IOP Conference Series: Materials Science and Engineering 213, 012007 (2017)

 

2017 - May 08

In our new article we discuss possibilities to refill DSSCs:

C. Hellert, C. Klemt, U. Scheidt, I. Juhász Junger, A. Ehrmann, E. Schwenzfeier-Hellkamp
Rehydrating dye sensitized solar cells
AIMS Energy 5, 397-403 (2017)

 

2017 - April 28

Measuring a 12 channel ECG with textile electrodes in underwear is the topic of our next paper:

S. Trummer, A. Ehrmann, A. Büsgen
Development of underwear with integrated 12 channel ECG for men and women
Autex Research Journal, online first (2017)

 

2017 - April 21

In our recent paper, we have evaluated relaxation mechanisms of knitted fabrics dependent on the fabric parameters:

E. Gsell, F. Heimlich, A. Ehrmann, M. O. Weber
Dependence of dry, wet and washing relaxation on knitted structures and fabric parameters
Industria Textila 68, 121-125 (2017)

 

2017 - April 17

Measuring MOKE is not only possible on flat, even surfaces, as we have shown now:

T. Blachowicz, A. Ehrmann, B. Mahltig
Magneto-optic measurements on uneven magnetic layers on cardboard
AIP Advances 7, 045306 (2017)

 

2017 - March 16

The next article about DSSCs on textile substrates has just been published:

I. Juhász Junger, S. V. Homburg, T. Grethe, A. Herrmann, J. Fiedler, A. Schwarz-Pfeiffer, T. Blachowicz, A. Ehrmann
Examination of the sintering process dependent properties of TiO2 on glass and textile substrates
Journal of Photonics for Energy 7, 015001

 

2017 - March 14

Our article investigating the pH value influence on DSSC properties is now published:

I. Juhász Junger, S. V. Homburg, H. Meissner, T. Grethe, A. Schwarz-Pfeiffer, J. Fiedler, A. Herrmann, T. Blachowicz, A. Ehrmann
Influence of the pH value of anthocyanins on the electrical properties of dye-sensitized solar cells
AIMS Energy 5, 258-267 (2017)

 

2017 - February 21

Our paper about the influence of clustering on magnetic nanoparticles is just published:

A. Ehrmann, T. Blachowicz
Interaction between magnetic nanoparticles in clusters
AIMS Materials Science 4, 383-390 (2017)

 

2017 - February 15

Two new papers about 3D micromagnetic simulations and textile-based batteries are published:

T. Blachowicz and A. Ehrmann
Micromagnetic investigation of low-symmetry 3D particles
IOP Conference Series: Materials Science and Engineering 175, 012057 (2017)

M. Normann, T. Grethe, A. Schwarz-Pfeiffer, and A. Ehrmann
Development and characterization of textile batteries
IOP Conference Series: Materials Science and Engineering 175, 012058 (2017)

 

2016 - December 21

Our article about the possibility to differentiate between different natural and man-made fibers without a microscope is now published:

A. Angelow, H. Bednorz, S. Böttcher, N. Schrader, A. Ehrmann
Optical differentiation between cashmere and other textile fibers by laser diffraction
Indian Journal of Fibre & Textile Research 41, 444-447

 

2016 - November 17

Our new book is published as e-book and hardcover:

A. Ehrmann and T. Blachowicz
Examination of Textiles with Mathematical and Physical Methods
Springer International Publishing, ISBN 978-3-319-47408-3 (E-book) / 978-3-319-47406-9 (Hardcover), 2016

 

2016 - October 01

Our article dealing with contacting electronics on textiles by 3D printing is published:

N. Grimmelsmann, Y. Martens, P. Schäl, H. Meissner, A. Ehrmann
Mechanical and Electrical Contacting of Electronic Components on Textiles by 3D Printing
Procedia Technology 26, 66-71 (2016)

 

2016 - September 06

Two new papers about magnetic nanoparticles and magnetic coatings on textiles were published:

T. Blachowicz, A. Ehrmann
Simulation of magnetic coatings on textile fibers
Journal of Physics: Conference Series 738, 012057 (2016)

T. Blachowicz, A. Ehrmann
Stability of magnetic nano-structures with respect to shape modifications
Journal of Physics: Conference Series 738, 012058 (2016)

 

2016 - August 09

Two new papers about smart textiles were published in a volume co-edited by me:

S. Aumann, A. Ehrmann, M. O. Weber (Ed.)
Proceedings of 48th Conference of the International Federation of Knitting Technologists (IFKT), 8–11 June 2016, Moenchengladbach, Germany
IOP Conference Series: Materials Science and Engineering 141 (2016)

A. Schwarz-Pfeiffer, M. Obermann, M. O. Weber and A. Ehrmann
Smarten up garments through knitting
IOP Conference Series: Materials Science and Engineering 141, 012008 (2016)

M. Obermann, M. Ellouz, S. Aumann, Y. Martens, P. Bartelt, M. Klöcker, T. Kordisch, A. Ehrmann and M. O. Weber
Non-destructive X-ray examination of weft knitted wire structures
IOP Conference Series: Materials Science and Engineering 141, 012007 (2016)

 

2016 - July 28

The results of our investigations of 3D printed auxetic forms on flexible substrates have been published:

N. Grimmelsmann, H. Meissner, A. Ehrmann
3D printed auxetic forms on knitted fabrics for adjustable permeability and mechanical properties
IOP Conference Series: Materials Science and Engineering 137, 012011 (2016)

 

2016 - April 29

Our new article about the sintering process of TiO2 in textile-based solar cells is published:

A. Herrmann, J. Fiedler, A. Ehrmann, T. Grethe, A. Schwarz-Pfeiffer, T. Blachowicz
Examination of the sintering process dependent micro- and nanostructure of TiO2 on textile substrates
Proc. SPIE 9898, Photonics for Solar Energy Systems VI, 98980S (2016)

 

2016 - April 24

Two articles dealing with nano-magnets are now published and freely available:

T. Blachowicz and A. Ehrmann
Stability of magnetic nano-structures against erroneous shape modifications
AIP Conf. Proc. 1727, 020004 (2016)

T. Blachowicz and A. Ehrmann
Magnetization reversal in 3D nano-structures of different shapes
AIP Conf. Proc. 1727, 020003 (2016)

 

2016 - March 30

Our article about a pseudo exchange-bias due to a rotational anisotropy is available now - for a limited time even for free:

A. Ehrmann, S. Komraus, T. Blachowicz, K. Domino, M.-K. Nees, P.-J. Jakobs, H. Leiste, M. Mathes, and M. Schaarschmidt
Pseudo exchange bias due to rotational anisotropy
J. Magn. Magn. Mat. 412, 7-10 (2016)

 

2016 - March 18

Our new paper about statistical analysis of fibrous structures is published:

T. Blachowicz, A. Ehrmann, K. Domino
Statistical analysis of digital images of periodic fibrous structures using generalized Hurst exponent distributions
Physica A: Statistical Mechanics and its Applications 452, 167-177 (2016)

 

2015 - September 24

Three new articles on one day:

A. Ehrmann, T. Blachowicz, H. Zghidi, M. O. Weber
Reliability of statistic evaluation of microscopic pictures taken from knitted fabrics
Journal of Physics: Conference Series 633, 012101 (2015)

T. Blachowicz, A. Ehrmann
Magnetization reversal modes in fourfold Co nano-wire systems
Journal of Physics: Conference Series 633, 012100 (2015)

C. Richter, S. Schmülling, A. Ehrmann, K. Finsterbusch
FDM printing of 3D forms with embedded fibrous materials
Design, Manufacturing and Mechatronics, pp. 961-969 (2015)

 

2015 - September 04

Two new articles in the areas of 3D printing and magnetic nano-objects are published:

A. Ehrmann, T. Blachowicz
Influence of shape and dimension on magnetic anisotropies and magnetization reversal of Py, Fe, and Co nano-objects with four-fold symmetry
AIP Advances 5, 097109 (2015)

L. Sabantina, F. Kinzel, A. Ehrmann, K. Finsterbusch
Combining 3D printed forms with textile structures - mechanical and geometrical properties of multi-material systems
IOP Conf. Series: Materials Science and Engineering 87, 012005 (2015)

 

2015 - April 28

Our new paper about experimental and theoretical examination of square nanowires is published:

A. Ehrmann, T. Blachowicz, S. Komraus, M.-K. Nees, P.-J. Jakobs, H. Leiste, M. Mathes, and M. Schaarschmidt
Magnetic properties of square Py nanowires: irradiation dose and geometry dependence
Journal of Applied Physics 117, 173903 (2015)

 

2015 - April 16

Our new article about the possibility to examine knitted fabric hairiness using a random walk approach is just published online:

A. Ehrmann, T. Blachowicz, K. Domino, S. Aumann, M. O. Weber, H. Zghidi
Examination of hairiness changes due to washing in knitted fabrics using a random walk approach (Abstract / pdf)
Text. Res. J., online first (2015)

 

2015 - April 09

The next article about our Ising-model spreadsheet analysis program is just published:

A. Ehrmann, T. Blachowicz, H. Zghidi
Spreadsheet analysis of stability and meta-stability of low-dimensional magnetic particles using Ising approach (Abstract / pdf)
European Journal of Physics 36, 035028 (2015)

 

2015 - March 29

Our new paper about water-repellent leather treatment etc. is just published:

M. Türk, A. Ehrmann & B. Mahltig
Water-, oil-, and soil-repellent treatment of textiles, artificial leather, and leather
Journal of the Textile Institute 106, 611-620 (2015)

 

2015 - March 22

A new manuscript is accepted for publication in the Textile Research Journal:

A. Ehrmann, T. Blachowicz, K. Domino, S. Aumann, M. O. Weber, H. Zghidi
Examination of hairiness changes due to washing in knitted fabrics using a random walk approach
Text. Res. J., accepted 22-03-2015

 

2015 - March 16

A new manuscript has been accepted for publication in the European Journal of Physics:

A. Ehrmann, T. Blachowicz, H. Zghidi
Spreadsheet analysis of stability and meta-stability of low-dimensional magnetic particles using Ising approach
European Journal of Physics, accepted 16-03-2015

 

2015 - February 26

Two new papers are accepted for publication in the Journal of Physics: Conference Series:

T. Blachowicz, A. Ehrmann, H. Zghidi, M. O. Weber
Reliability of statistic evaluation of microscopic pictures taken from knitted fabrics
Journal of Physics: Conference Series, accepted 26-02-2015

T. Blachowicz, A. Ehrmann
Magnetization reversal modes in fourfold Co nano-wire systems
Journal of Physics: Conference Series, accepted 26-02-2015

 

2015 - January 26

Two new conference papers are published in the Journal of Physics: Conference Series:

A. Ehrmann, T. Blachowicz
A simple model of hysteresis behavior using spreadsheet analysis
Journal of Physics: Conference Series 574, 012158 (2015)

T. Blachowicz, A. Ehrmann
Anatomy of Demagnetizing and Exchange Fields in Magnetic Nano-Dots Influenced by 3D Shape Modifications
Journal of Physics: Conference Series 574, 012054 (2015)

 

2015 - January 09

A new article about modeling textile magnetic structures is published online first:

A. Ehrmann, T. Blachowicz
Micromagnetic simulation of fibers and coatings on textiles
Journal of The Institution of Engineers (India): Series E, online first

 

2014 - November 27-28

Five new conference papers have been published in the proceedings of the Aachen-Dresden International Textile Conference.

 

2014 - October 18

During the German conference of women in physics, I was given the opportunity to present our newly-developed macrospin model of hysteresis loop shapes for different fourfold anisotropies:

A. Ehrmann, T. Blachowicz
Macrospin modeling of magnetization reversal processes in systems with different anisotropies
Deutsche Physikerinnentagung, Dresden 18.10.2014

 

2014 - October 14

A new article about a simple spreadsheet model calculating hysteresis loops has just been accepted:

A. Ehrmann, T. Blachowicz
A simple model of hysteresis behavior using spreadsheet analysis
Journal of Physics: Conference Series, accepted 14-10-2014

 

2014 - October 10

The next article has just been published, dealing with the relaxation process in knitted fabrics produced from different yarns and in sample dimensions:

A. Ehrmann, T. Blachowicz, F. Heimlich, A. Brücken, M. O. Weber
Influence of the sample dimension and yarn type on the washing relaxation process of knitted fabrics
Tekstil 63, 163-167 (2014)

 

2014 - October 08

Results of our project dealing with utilization of knitted conductive fabrics as elongation sensors have been published:

A. Ehrmann, F. Heimlich, A. Brücken, M. O. Weber, R. Haug
Suitability of knitted fabrics as elongation sensors subject to structure, stitch dimension and elongation direction (Abstract / pdf)
 Textile Research Journal 84, 2006-2012 (2014)

 

2014 - October 03

A new article about magnetic nano-dots with 3D shape modifications has just been accepted:

T. Blachowicz, A. Ehrmann
Anatomy of Demagnetizing and Exchange Fields in Magnetic Nano-Dots Influenced by 3D Shape Modifications
Journal of Physics: Conference Series, accepted 01-10-2014

 

2014 - September 14

The results of simulations and experiments related to novel memory cells have been published as a book:

A. Ehrmann
Examination and simulation of new magnetic materials for the possible application in memory cells
ISBN 978-3-8325-3772-2, Logos Verlag, Berlin 2014

 

2014 - August 13

In our just published article which is freely available we report about hysteresis loop shapes, simulated for different fourfold anisotropies:

 

2014 - August 09

Our latest article about 3D printing of textile-based structures has just been published and is freely available:

R. Melnikova, A. Ehrmann, K. Finsterbusch
3D printing of textile-based structures by Fused Deposition Modelling (FDM) with different polymer materials
IOP Conf. Ser.: Mater. Sci. Eng. 62, 012018 (2014)

 

2014 - August 02

A new article about utilization of conductive knitted fabrics as elongation sensors has just been accepted:

A. Ehrmann, F. Heimlich, A. Brücken, M. O. Weber, R. Haug
Suitability of knitted fabrics as elongation sensors subject to structure, stitch dimension and elongation direction
Textile Research Journal, accepted 02-08-2014

 

2014 - July 10

A new scientific blog is being developed: VIARAM - Virtual Institute of Applied Research on Advanced Materials.
Please check out from time to time!