Reference : Excitation of Ni nanorod colloids in oscillating magnetic fields: a new approach for ...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/10993/22502
Excitation of Ni nanorod colloids in oscillating magnetic fields: a new approach for nanosensing investigated by TISANE
English
Bender, Philipp [Universität des Saarlandes > Experimentalphysik]
Günther, Annegret mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Honecker, Dirk mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Wiedenmann, Albrecht [Institute Laue Langevin, Grenoble]
Disch, Sabrina [Universität zu Köln > Institut für Physikalische Chemie > Department Chemie]
Tschöpe, Andreas [Universität des Saarlandes > Experimentalphysik]
Michels, Andreas mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Birringer, Rainer [Universität des Saarlandes > Experimentalphysik]
9-Sep-2015
Nanoscale
RSC Publishing
7
17122
Yes (verified by ORBilu)
International
2040-3364
2040-3372
Cambridge
United Kingdom
[en] The response of a colloidal dispersion of Ni nanorods to an oscillating magnetic field was characterized by optical transmission measurements as well as small-angle neutron scattering (SANS) experiments using the TISANE (Time-dependent SANS experiments) technique. Exposed to a static magnetic field, the scattering intensity of the rod ensemble could be well described by the cylinder form factor using the geometrical particle parameters (length, diameter, orientation distribution) determined by transmission electronmicroscopy and magnetometry. An oscillation of the field vector resulted in a reorientation of the nanorods and a time-dependency of the scattering intensity due to the shape anisotropy of the rods. Analysis of the SANS data revealed that in the range of low frequencies the orientation distribution of the rods is comparable to the static case. With increasing frequency, the rod oscillation was gradually damped due to an increase of the viscous drag. It could be shown that despite of the increased friction in the high frequency range no observable change of the orientation distribution of the ensemble with respect to its symmetry axis occurs.
http://hdl.handle.net/10993/22502
10.1039/C5NR04243G
http://pubs.rsc.org/en/Content/ArticleLanding/2015/NR/C5NR04243G#!divAbstract

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