Universität zu Köln

Roeben, Eric, Roeder, Lisa, Teusch, Sandra, Effertz, Marc, Deiters, Ulrich K. ORCID: 0000-0001-7669-5847 and Schmidt, Annette M. (2014). Magnetic particle nanorheology. Colloid Polym. Sci., 292 (8). S. 2013 - 2024. NEW YORK: SPRINGER. ISSN 1435-1536

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Abstract

We investigate the employment of AC susceptometry as a novel method to extract frequency- and scale-dependent rheological properties of soft materials. The approach makes use of the interrelation between the magnetic susceptibility of magnetically blocked tracer particles and the mechanical modulus of the matrix as experienced on the particle scale. We report susceptibility measurements on aqueous solutions of ethylene glycol, triethylene glycol, or poly-(ethylene glycol), using CoFe2O4 nanoparticles as tracer particles, in the frequency range of 1 Hz-250 kHz. Frequency-dependent rheological properties, including viscosity and loss moduli, of the solutions were obtained by applying an extended Debye relaxation model and a method analogous to the Gemant-DiMarzio-Bishop approach.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Roeben, Eric UNSPECIFIED UNSPECIFIED UNSPECIFIED Roeder, Lisa UNSPECIFIED UNSPECIFIED UNSPECIFIED Teusch, Sandra UNSPECIFIED UNSPECIFIED UNSPECIFIED Effertz, Marc UNSPECIFIED UNSPECIFIED UNSPECIFIED Deiters, Ulrich K. UNSPECIFIED orcid.org/0000-0001-7669-5847 UNSPECIFIED Schmidt, Annette M. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-432819
DOI:	10.1007/s00396-014-3289-6
Journal or Publication Title:	Colloid Polym. Sci.
Volume:	292
Number:	8
Page Range:	S. 2013 - 2024
Date:	2014
Publisher:	SPRINGER
Place of Publication:	NEW YORK
ISSN:	1435-1536
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Physical Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language NANOPARTICLES; DYNAMICS; POLYMERIZATION; MICRORHEOLOGY; MODEL Multiple languages Chemistry, Physical; Polymer Science Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/43281