Journal Article

FZJ-2017-08446

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Anisotropic thermophoresis

Tan, Z. (Corresponding author)FZJ* ; Yang, M. (Corresponding author) ; Ripoll, M. (Corresponding author)FZJ*

2017
Royal Soc. of Chemistry London

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Please use a persistent id in citations: http://hdl.handle.net/2128/22836  doi:10.1039/C7SM01436H

Abstract: Colloidal migration in a temperature gradient is referred to as thermophoresis. In contrast to particles with a spherical shape, we show that elongated colloids may have a thermophoretic response that varies with the colloid orientation. Remarkably, this can translate into a non-vanishing thermophoretic force in the direction perpendicular to the temperature gradient. Opposite to the friction force, the thermophoretic force of a rod oriented with the temperature gradient can be larger or smaller than when oriented perpendicular to it. The precise anisotropic thermophoretic behavior clearly depends on the colloidal rod aspect ratio, and also on its surface details, which provides an interesting tunability to the devices constructed based on this principle. By means of mesoscale hydrodynamic simulations, we characterize this effect for different types of rod-like colloids.

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Contributing Institute(s):

1. Theorie der Weichen Materie und Biophysik (IAS-2)
2. JARA - HPC (JARA-HPC)

Research Program(s):

1. 551 - Functional Macromolecules and Complexes (POF3-551) (POF3-551)
2. Structure Formation in Thermal Barrier Coatings (jjsc22_20150501) (jjsc22_20150501)
3. Thermophoretic microswimmers: from single particle to collective properties (jics22_20151101) (jics22_20151101)

Appears in the scientific report 2017

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Database coverage:
; ; Allianz-Lizenz / DFG ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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