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:
CreatorsEmailORCIDORCID Put Code
Hod, ManuelaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dobbrow, CelinUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vaidyanathan, MukanthUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Guin, DebanjanUNSPECIFIEDorcid.org/0000-0001-6279-3016UNSPECIFIED
Belkoura, LhoussaineUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Strey, ReinhardUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gottlieb, MosheUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schmidt, Annette M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
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:
KeywordsLanguage
SYMMETRIC TOP MACROMOLECULES; CHAINS; SPHERE; SOFTMultiple languages
Chemistry, PhysicalMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/42027

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