Universität zu Köln

Nadasi, Hajnalka ORCID: 0000-0001-5658-7080, Corradi, Aurea, Stannarius, Ralf ORCID: 0000-0002-6836-3663, Koch, Karin, Schmidt, Annette M., Aya, Satoshi, Araoka, Fumito ORCID: 0000-0002-9387-6081 and Eremin, Alexey (2019). The role of structural anisotropy in the magnetooptical response of an organoferrogel with mobile magnetic nanoparticles. Soft Matter, 15 (18). S. 3788 - 3796. CAMBRIDGE: ROYAL SOC CHEMISTRY. ISSN 1744-6848

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Abstract

We investigate the structure and the magnetooptical response of isotropic and anisotropic fibrillous organoferrogels with mobile magnetic nanoparticles (MNPs). We demonstrate that the presence of the gel network restricts the magnetooptical response of the ferrogel. Even though the ferrogel exhibits no magnetic hysteresis, an optical hysteresis has been found. This suggests that the magnetooptical response is primarily determined by the dynamics of self-assembly of the MNPs into shape-anisotropic agglomerates. Furthermore, we show that the optical anisotropy of the system can be fine-tuned by varying the concentration of the gelator and the MNPs, respectively. The optical response in structurally anisotropic gels becomes orientation-dependent, revealing an intricate interplay between the gel mesh and the MNPs.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Nadasi, Hajnalka UNSPECIFIED orcid.org/0000-0001-5658-7080 UNSPECIFIED Corradi, Aurea UNSPECIFIED UNSPECIFIED UNSPECIFIED Stannarius, Ralf UNSPECIFIED orcid.org/0000-0002-6836-3663 UNSPECIFIED Koch, Karin UNSPECIFIED UNSPECIFIED UNSPECIFIED Schmidt, Annette M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Aya, Satoshi UNSPECIFIED UNSPECIFIED UNSPECIFIED Araoka, Fumito UNSPECIFIED orcid.org/0000-0002-9387-6081 UNSPECIFIED Eremin, Alexey UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-148212
DOI:	10.1039/c9sm00219g
Journal or Publication Title:	Soft Matter
Volume:	15
Number:	18
Page Range:	S. 3788 - 3796
Date:	2019
Publisher:	ROYAL SOC CHEMISTRY
Place of Publication:	CAMBRIDGE
ISSN:	1744-6848
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language 12-HYDROXYSTEARIC ACID; 12-HYDROXYOCTADECANOIC ACID; FERROFLUIDS; CHAINS; BIREFRINGENCE; AGGREGATION; ORIENTATION; DICHROISM; ORGANOGEL; GELATORS Multiple languages Chemistry, Physical; Materials Science, Multidisciplinary; Physics, Multidisciplinary; Polymer Science Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/14821