Welcome on Andrea Ehrmann's website!

 

News

 

2017 - September 18

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

A. Ehrmann, T. Blachowicz
Magnetization reversal in ferromagnetic nano-rings of fourfold symmetries
Advances in Materials Science and Engineering, online first (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!