Welcome on Andrea Ehrmann's website!

 

News

 

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, online first (2017)

 

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!