Universität zu Köln

Hod, Manuela, Dobbrow, Celin, Vaidyanathan, Mukanth, Guin, Debanjan ORCID: 0000-0001-6279-3016, Belkoura, Lhoussaine, Strey, Reinhard, Gottlieb, Moshe and Schmidt, Annette M. (2014). Controlling the self-assembly of magnetic nanoparticles by competing dipolar and isotropic particle interactions. J. Colloid Interface Sci., 436. S. 83 - 90. SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE. ISSN 1095-7103

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Abstract

Control over the self-assembly of magnetic nanoparticles (MNP) into superstructures due to different types of coupling is of interest in the development of bottom-up fabrication schemes. Here we realize a simple strategy for the systematic variation of particle interaction potential in magnetic nanoparticles. This is achieved by varying the effective surface potential by means of a co-surfactant introduced in the course of the synthesis process. As a consequence, the ability to form chain-like assemblies is affected by the resulting balance of attractive and repulsive forces. We use electron microscopy, electron diffraction, and light scattering methods to study a series of cobalt nanoparticles as a characteristic example of ferromagnetic MNP. We demonstrate experimentally and substantiate theoretically that the observed behavior results from a balance between magnetic dipole-dipole, steric, and electrostatic interactions. (C) 2014 Elsevier Inc. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Hod, Manuela UNSPECIFIED UNSPECIFIED UNSPECIFIED Dobbrow, Celin UNSPECIFIED UNSPECIFIED UNSPECIFIED Vaidyanathan, Mukanth UNSPECIFIED UNSPECIFIED UNSPECIFIED Guin, Debanjan UNSPECIFIED orcid.org/0000-0001-6279-3016 UNSPECIFIED Belkoura, Lhoussaine UNSPECIFIED UNSPECIFIED UNSPECIFIED Strey, Reinhard UNSPECIFIED UNSPECIFIED UNSPECIFIED Gottlieb, Moshe UNSPECIFIED UNSPECIFIED UNSPECIFIED Schmidt, Annette M. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-420274
DOI:	10.1016/j.jcis.2014.08.024
Journal or Publication Title:	J. Colloid Interface Sci.
Volume:	436
Page Range:	S. 83 - 90
Date:	2014
Publisher:	ACADEMIC PRESS INC ELSEVIER SCIENCE
Place of Publication:	SAN DIEGO
ISSN:	1095-7103
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SYMMETRIC TOP MACROMOLECULES; CHAINS; SPHERE; SOFT Multiple languages Chemistry, Physical Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/42027