---
_id: '2282'
abstract:
- lang: eng
text: Magnetic nanoparticles can be embedded in electrospun nanofibers and other
polymeric matrices to prepare magnetic composites with defined magnetic and mechanical
properties. Metal-oxide nanoparticles, such as magnetite or nickel-ferrite, are
of special interest since they do not need a coating to avoid oxidation. Like
other nanoparticles, these metal-oxide nanoparticles tend to form agglomerations,
in this way modifying the magnetic properties of the composites. After studying
this effect for the magnetic elements Co, Fe, Ni as well as permalloy (Py) in
a previous study, defining a new method to quantify the nanoparticle distribution
in a polymer, here we concentrate on the influence of agglomerations on the magnetic
properties of metal-oxide nanoparticles with different diameters in non-magnetic
matrices.
article_type: original
author:
- first_name: Tomasz
full_name: Blachowicz, Tomasz
last_name: Blachowicz
- first_name: Jacek
full_name: Grzybowski, Jacek
last_name: Grzybowski
- first_name: Andrea
full_name: Ehrmann, Andrea
id: '223776'
last_name: Ehrmann
orcid: 0000-0003-0695-3905
citation:
alphadin: 'Blachowicz, Tomasz ; Grzybowski, Jacek ; Ehrmann,
Andrea: Influence of agglomerations on magnetic properties of polymer matrices
filled with magnetic nanoparticles. In: Materials Today: Proceedings Bd.
67, Elsevier BV (2022), S. 792–796'
ama: 'Blachowicz T, Grzybowski J, Ehrmann A. Influence of agglomerations on magnetic
properties of polymer matrices filled with magnetic nanoparticles. Materials
Today: Proceedings. 2022;67:792-796. doi:10.1016/j.matpr.2022.07.362'
apa: 'Blachowicz, T., Grzybowski, J., & Ehrmann, A. (2022). Influence of agglomerations
on magnetic properties of polymer matrices filled with magnetic nanoparticles.
Materials Today: Proceedings, 67, 792–796. https://doi.org/10.1016/j.matpr.2022.07.362'
bibtex: '@article{Blachowicz_Grzybowski_Ehrmann_2022, title={Influence of agglomerations
on magnetic properties of polymer matrices filled with magnetic nanoparticles},
volume={67}, DOI={10.1016/j.matpr.2022.07.362},
journal={Materials Today: Proceedings}, publisher={Elsevier BV}, author={Blachowicz,
Tomasz and Grzybowski, Jacek and Ehrmann, Andrea}, year={2022}, pages={792–796}
}'
chicago: 'Blachowicz, Tomasz, Jacek Grzybowski, and Andrea Ehrmann. “Influence of
Agglomerations on Magnetic Properties of Polymer Matrices Filled with Magnetic
Nanoparticles.” Materials Today: Proceedings 67 (2022): 792–96. https://doi.org/10.1016/j.matpr.2022.07.362.'
ieee: 'T. Blachowicz, J. Grzybowski, and A. Ehrmann, “Influence of agglomerations
on magnetic properties of polymer matrices filled with magnetic nanoparticles,”
Materials Today: Proceedings, vol. 67, pp. 792–796, 2022.'
mla: 'Blachowicz, Tomasz, et al. “Influence of Agglomerations on Magnetic Properties
of Polymer Matrices Filled with Magnetic Nanoparticles.” Materials Today: Proceedings,
vol. 67, Elsevier BV, 2022, pp. 792–96, doi:10.1016/j.matpr.2022.07.362.'
short: 'T. Blachowicz, J. Grzybowski, A. Ehrmann, Materials Today: Proceedings 67
(2022) 792–796.'
date_created: 2022-12-23T14:53:32Z
date_updated: 2024-03-27T14:01:15Z
doi: 10.1016/j.matpr.2022.07.362
file:
- access_level: open_access
content_type: application/pdf
creator: aehrmann
date_created: 2022-12-23T14:52:51Z
date_updated: 2022-12-23T14:52:51Z
file_id: '2283'
file_name: _2022_Blachowicz_MaterTodayProc_online-first.pdf
file_size: 1939143
relation: main_file
success: 1
file_date_updated: 2022-12-23T14:52:51Z
has_accepted_license: '1'
intvolume: ' 67'
keyword:
- Magnetic nanoparticles Electrospinning Magnetite Nickel-ferrite Maghemite
language:
- iso: eng
oa: '1'
page: 792-796
publication: 'Materials Today: Proceedings'
publication_identifier:
issn:
- '22147853'
publication_status: published
publisher: Elsevier BV
quality_controlled: '1'
status: public
title: Influence of agglomerations on magnetic properties of polymer matrices filled
with magnetic nanoparticles
type: journal_article
urn: urn:nbn:de:hbz:bi10-22821
user_id: '216459'
volume: 67
year: '2022'
...
---
_id: '2041'
abstract:
- lang: eng
text: " Electrospinning can be used to produce nanofiber mats containing
diverse nanoparticles for various purposes. Magnetic nanoparticles, such as magnetite
(Fe3O4), can be introduced to produce magnetic nanofiber mats, e.g., for hyperthermia
applications, but also for basic research of diluted magnetic systems. As the
number of nanoparticles increases, however, the morphology and the mechanical
properties of the nanofiber mats decrease, so that freestanding composite nanofiber
mats with a high content of nanoparticles are hard to produce. Here we report
on poly (acrylonitrile) (PAN) composite nanofiber mats, electrospun by a needle-based
system, containing 50 wt% magnetite nanoparticles overall or in the shell of core–shell
fibers, collected on a flat or a rotating collector. While the first nanofiber
mats show an irregular morphology, the latter are quite regular and contain straight
fibers without many beads or agglomerations. Scanning electron microscopy (SEM)
and atomic force microscopy (AFM) reveal agglomerations around the pure composite
nanofibers and even, round core–shell fibers, the latter showing slightly increased
fiber diameters. Energy dispersive X-ray spectroscopy (EDS) shows a regular distribution
of the embedded magnetic nanoparticles. Dynamic mechanical analysis (DMA) reveals
that mechanical properties are reduced as compared to nanofiber mats with smaller
amounts of magnetic nanoparticles, but mats with 50 wt% magnetite are still freestanding.\r\n
\ "
article_number: '533'
article_type: original
author:
- first_name: Al
full_name: Mamun, Al
last_name: Mamun
- first_name: Lilia
full_name: Sabantina, Lilia
last_name: Sabantina
- first_name: Michaela
full_name: Klöcker, Michaela
last_name: Klöcker
- first_name: Alexander
full_name: Heide, Alexander
last_name: Heide
- first_name: Tomasz
full_name: Blachowicz, Tomasz
last_name: Blachowicz
- first_name: Andrea
full_name: Ehrmann, Andrea
id: '223776'
last_name: Ehrmann
orcid: 0000-0003-0695-3905
citation:
alphadin: 'Mamun, Al ; Sabantina,
Lilia ; Klöcker, Michaela
; Heide, Alexander ; Blachowicz,
Tomasz ; Ehrmann, Andrea:
Electrospinning Nanofiber Mats with Magnetite Nanoparticles Using Various Needle-Based
Techniques. In: Polymers Bd. 14, MDPI AG (2022), Nr. 3'
ama: Mamun A, Sabantina L, Klöcker M, Heide A, Blachowicz T, Ehrmann A. Electrospinning
Nanofiber Mats with Magnetite Nanoparticles Using Various Needle-Based Techniques.
Polymers. 2022;14(3). doi:10.3390/polym14030533
apa: Mamun, A., Sabantina, L., Klöcker, M., Heide, A., Blachowicz, T., & Ehrmann,
A. (2022). Electrospinning Nanofiber Mats with Magnetite Nanoparticles Using Various
Needle-Based Techniques. Polymers, 14(3). https://doi.org/10.3390/polym14030533
bibtex: '@article{Mamun_Sabantina_Klöcker_Heide_Blachowicz_Ehrmann_2022, title={Electrospinning
Nanofiber Mats with Magnetite Nanoparticles Using Various Needle-Based Techniques},
volume={14}, DOI={10.3390/polym14030533},
number={3533}, journal={Polymers}, publisher={MDPI AG}, author={Mamun, Al and
Sabantina, Lilia and Klöcker, Michaela and Heide, Alexander and Blachowicz, Tomasz
and Ehrmann, Andrea}, year={2022} }'
chicago: Mamun, Al, Lilia Sabantina, Michaela Klöcker, Alexander Heide, Tomasz Blachowicz,
and Andrea Ehrmann. “Electrospinning Nanofiber Mats with Magnetite Nanoparticles
Using Various Needle-Based Techniques.” Polymers 14, no. 3 (2022). https://doi.org/10.3390/polym14030533.
ieee: A. Mamun, L. Sabantina, M. Klöcker, A. Heide, T. Blachowicz, and A. Ehrmann,
“Electrospinning Nanofiber Mats with Magnetite Nanoparticles Using Various Needle-Based
Techniques,” Polymers, vol. 14, no. 3, 2022.
mla: Mamun, Al, et al. “Electrospinning Nanofiber Mats with Magnetite Nanoparticles
Using Various Needle-Based Techniques.” Polymers, vol. 14, no. 3, 533,
MDPI AG, 2022, doi:10.3390/polym14030533.
short: A. Mamun, L. Sabantina, M. Klöcker, A. Heide, T. Blachowicz, A. Ehrmann,
Polymers 14 (2022).
date_created: 2022-07-14T17:59:30Z
date_updated: 2024-03-27T14:01:14Z
doi: 10.3390/polym14030533
file:
- access_level: open_access
content_type: application/pdf
creator: aehrmann
date_created: 2022-07-14T17:59:05Z
date_updated: 2022-07-14T17:59:05Z
file_id: '2042'
file_name: _2022_Mamun_Polymers14_533.pdf
file_size: 15471389
relation: main_file
success: 1
file_date_updated: 2022-07-14T17:59:05Z
has_accepted_license: '1'
intvolume: ' 14'
issue: '3'
keyword:
- freestanding nanofiber mats
- magnetic nanoparticles
- needle-based electrospinning
- coaxial spinning
- dynamic mechanical analysis (DMA)
- atomic force microscopy (AFM)
- scanning electron microscopy (SEM)
language:
- iso: eng
oa: '1'
publication: Polymers
publication_identifier:
eissn:
- 2073-4360
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: Electrospinning Nanofiber Mats with Magnetite Nanoparticles Using Various Needle-Based
Techniques
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
urn: urn:nbn:de:hbz:bi10-20419
user_id: '216459'
volume: 14
year: '2022'
...
---
_id: '654'
abstract:
- lang: eng
text: Magnetic nanofibers are of great interest in basic research, as well
as for possible applications in spintronics and neuromorphic computing. Here we
report on the preparation of magnetic nanofiber mats by electrospinning polyacrylonitrile
(PAN)/nanoparticle solutions, creating a network of arbitrarily oriented nanofibers
with a high aspect ratio. Since PAN is a typical precursor for carbon, the magnetic
nanofiber mats were stabilized and carbonized after electrospinning. The magnetic
properties of nanofiber mats containing magnetite or nickel ferrite nanoparticles
were found to depend on the nanoparticle diameters and the potential after-treatment,
as compared with raw nanofiber mats. Micromagnetic simulations underlined the
different properties of both magnetic materials. Atomic force microscopy and scanning
electron microscopy images revealed nearly unchanged morphologies after stabilization
without mechanical fixation, which is in strong contrast to pure PAN nanofiber
mats. While carbonization at 500 °C left the morphology unaltered, as compared
with the stabilized samples, stronger connections between adjacent fibers were
formed during carbonization at 800 °C, which may be supportive of magnetic data
transmission.
article_number: '1552'
article_type: original
author:
- first_name: Nadine
full_name: Fokin, Nadine
last_name: Fokin
- first_name: Timo
full_name: Grothe, Timo
id: '221330'
last_name: Grothe
orcid: 0000-0002-9099-4277
orcid_put_code_url: https://api.orcid.org/v2.0/0000-0002-9099-4277/work/94763644
- first_name: Al
full_name: Mamun, Al
last_name: Mamun
- first_name: Marah
full_name: Trabelsi, Marah
last_name: Trabelsi
- first_name: Michaela
full_name: Klöcker, Michaela
last_name: Klöcker
- first_name: Lilia
full_name: Sabantina, Lilia
last_name: Sabantina
- first_name: Christoph
full_name: Döpke, Christoph
last_name: Döpke
- first_name: Tomasz
full_name: Blachowicz, Tomasz
last_name: Blachowicz
- first_name: Andreas
full_name: Hütten, Andreas
last_name: Hütten
- first_name: Andrea
full_name: Ehrmann, Andrea
id: '223776'
last_name: Ehrmann
orcid: 0000-0003-0695-3905
orcid_put_code_url: https://api.orcid.org/v2.0/0000-0003-0695-3905/work/94763646
citation:
alphadin: 'Fokin,
Nadine ; Grothe, Timo ; Mamun, Al ; Trabelsi,
Marah ; Klöcker, Michaela
; Sabantina, Lilia ; Döpke,
Christoph ; Blachowicz, Tomasz
; u. a.: Magnetic Properties of Electrospun Magnetic Nanofiber Mats after
Stabilization and Carbonization. In: Materials Bd. 13 (2020), Nr. 7'
ama: Fokin N, Grothe T, Mamun A, et al. Magnetic Properties of Electrospun Magnetic
Nanofiber Mats after Stabilization and Carbonization. Materials. 2020;13(7).
doi:10.3390/ma13071552
apa: Fokin, N., Grothe, T., Mamun, A., Trabelsi, M., Klöcker, M., Sabantina, L.,
… Ehrmann, A. (2020). Magnetic Properties of Electrospun Magnetic Nanofiber Mats
after Stabilization and Carbonization. Materials, 13(7). https://doi.org/10.3390/ma13071552
bibtex: '@article{Fokin_Grothe_Mamun_Trabelsi_Klöcker_Sabantina_Döpke_Blachowicz_Hütten_Ehrmann_2020,
title={Magnetic Properties of Electrospun Magnetic Nanofiber Mats after Stabilization
and Carbonization}, volume={13}, DOI={10.3390/ma13071552},
number={71552}, journal={Materials}, author={Fokin, Nadine and Grothe, Timo and
Mamun, Al and Trabelsi, Marah and Klöcker, Michaela and Sabantina, Lilia and Döpke,
Christoph and Blachowicz, Tomasz and Hütten, Andreas and Ehrmann, Andrea}, year={2020}
}'
chicago: Fokin, Nadine, Timo Grothe, Al Mamun, Marah Trabelsi, Michaela Klöcker,
Lilia Sabantina, Christoph Döpke, Tomasz Blachowicz, Andreas Hütten, and Andrea
Ehrmann. “Magnetic Properties of Electrospun Magnetic Nanofiber Mats after Stabilization
and Carbonization.” Materials 13, no. 7 (2020). https://doi.org/10.3390/ma13071552.
ieee: N. Fokin et al., “Magnetic Properties of Electrospun Magnetic Nanofiber
Mats after Stabilization and Carbonization,” Materials, vol. 13, no. 7,
2020.
mla: Fokin, Nadine, et al. “Magnetic Properties of Electrospun Magnetic Nanofiber
Mats after Stabilization and Carbonization.” Materials, vol. 13, no. 7,
1552, 2020, doi:10.3390/ma13071552.
short: N. Fokin, T. Grothe, A. Mamun, M. Trabelsi, M. Klöcker, L. Sabantina, C.
Döpke, T. Blachowicz, A. Hütten, A. Ehrmann, Materials 13 (2020).
date_created: 2021-01-03T16:31:45Z
date_updated: 2021-06-01T09:07:50Z
department:
- _id: '103'
doi: 10.3390/ma13071552
file:
- access_level: open_access
content_type: application/pdf
creator: aehrmann
date_created: 2021-01-03T16:31:11Z
date_updated: 2021-01-03T16:31:11Z
file_id: '655'
file_name: _2020_Fokin_materials13_1552_v2.pdf
file_size: 5060954
relation: main_file
success: 1
file_date_updated: 2021-01-03T16:31:11Z
funded_apc: '1'
has_accepted_license: '1'
intvolume: ' 13'
issue: '7'
keyword:
- ferrimagnetic materials
- superparamagnetism
- magnetic hysteresis
- magnetic materials
- magnetic nanoparticles
- nanocomposites
- nanowires
language:
- iso: eng
oa: '1'
publication: Materials
publication_identifier:
issn:
- 1996-1944
publication_status: published
quality_controlled: '1'
status: public
title: Magnetic Properties of Electrospun Magnetic Nanofiber Mats after Stabilization
and Carbonization
type: journal_article
user_id: '237837'
volume: 13
year: '2020'
...
---
_id: '639'
abstract:
- lang: eng
text: One-dimensional materials, such as nanowires, nanotubes, or nanofibers,
have attracted more and more attention recently due to their unique physical properties.
Their large length-to-diameter ratio creates anisotropic material properties which
could not be reached in bulk material. Especially one-dimensional magnetic structures
are of high interest since the strong shape anisotropy reveals new magnetization
reversal modes and possible applications. One possibility to create magnetic nanofibers
in a relatively simple way is offered by electrospinning them from polymer solutions
or melts with incorporated magnetic nanoparticles. This review gives an overview
of most recent methods of electrospinning magnetic nanofibers, measuring their
properties as well as possible applications from basic research to single-cell
manipulation to microwave absorption.
article_number: '155892501990084'
article_type: review
author:
- first_name: Tomasz
full_name: Blachowicz, Tomasz
last_name: Blachowicz
- first_name: Andrea
full_name: Ehrmann, Andrea
last_name: Ehrmann
date_created: 2021-01-03T14:45:37Z
date_updated: 2021-01-18T15:32:28Z
ddc:
- '620'
department:
- _id: '103'
doi: 10.1177/1558925019900843
file:
- access_level: open_access
content_type: application/pdf
creator: aehrmann
date_created: 2021-01-03T14:45:07Z
date_updated: 2021-01-03T14:45:07Z
file_id: '640'
file_name: _2020_Blachowicz_JEFF15_1558925019900843.pdf
file_size: 1135710
relation: main_file
success: 1
file_date_updated: 2021-01-03T14:45:07Z
funded_apc: '1'
has_accepted_license: '1'
intvolume: ' 15'
keyword:
- Electrospinning
- magnetic nanoparticles
- nanofibers
language:
- iso: eng
oa: '1'
publication: Journal of Engineered Fibers and Fabrics
publication_identifier:
issn:
- 1558-9250
- 1558-9250
publication_status: published
quality_controlled: '1'
status: public
title: 'Most recent developments in electrospun magnetic nanofibers: A review'
type: journal_article
user_id: '223776'
volume: 15
year: '2020'
...
---
_id: '662'
abstract:
- lang: eng
text: Neuromorphic computing is assumed to be significantly more energy
efficient than, and at the same time expected to outperform, conventional computers
in several applications, such as data classification, since it overcomes the so-called
von Neumann bottleneck. Artificial synapses and neurons can be implemented into
conventional hardware using new software, but also be created by diverse spintronic
devices and other elements to completely avoid the disadvantages of recent hardware
architecture. Here, we report on diverse approaches to implement neuromorphic
functionalities in novel hardware using magnetic elements, published during the
last years. Magnetic elements play an important role in neuromorphic computing.
While other approaches, such as optical and conductive elements, are also under
investigation in many groups, magnetic nanostructures and generally magnetic materials
offer large advantages, especially in terms of data storage, but they can also
unambiguously be used for data transport, e.g., by propagation of skyrmions or
domain walls. This review underlines the possible applications of magnetic materials
and nanostructures in neuromorphic systems.
article_number: '2550'
article_type: review
author:
- first_name: Tomasz
full_name: Blachowicz, Tomasz
last_name: Blachowicz
- first_name: Andrea
full_name: Ehrmann, Andrea
last_name: Ehrmann
date_created: 2021-01-03T16:40:37Z
date_updated: 2021-01-18T15:32:28Z
ddc:
- '530'
department:
- _id: '103'
doi: 10.3390/molecules25112550
file:
- access_level: open_access
content_type: application/pdf
creator: aehrmann
date_created: 2021-01-03T16:40:04Z
date_updated: 2021-01-03T16:40:04Z
file_id: '663'
file_name: _2020_Blachowicz_Molecules25_2550_v2.pdf
file_size: 5784324
relation: main_file
success: 1
file_date_updated: 2021-01-03T16:40:04Z
funded_apc: '1'
has_accepted_license: '1'
intvolume: ' 25'
issue: '11'
keyword:
- neuromorphic computing
- adaptive computing
- cognitive computing
- magnetism
- micromagnetic simulations
- magnetic nanoparticles
- neural network
language:
- iso: eng
oa: '1'
publication: Molecules
publication_identifier:
issn:
- 1420-3049
publication_status: published
quality_controlled: '1'
status: public
title: Magnetic Elements for Neuromorphic Computing
type: journal_article
user_id: '223776'
volume: 25
year: '2020'
...