Shape-dependent orientation of thermophoretic forces in microsystems

Handle URI:
http://hdl.handle.net/10754/552836
Title:
Shape-dependent orientation of thermophoretic forces in microsystems
Authors:
Li, Qi; Liang, Tengfei; Ye, Wenjing
Abstract:
It is generally acknowledged that the direction of the thermophoretic force acting on microparticles is largely determined by the imposed temperature gradient, and the shape of the microparticle has little influence on its direction. We show that one type of thermophoretic force, emerged due to the advent of microfabrication techniques, is highly sensitive to object shape, and it is feasible to tune force orientation via proper shape design. We reveal the underlying mechanism by an asymptotic analysis of the Boltzmann equation and point out the reason why the classical thermophoretic force is insensitive to the particle shape, but the force in microsystems is. The discovered phenomenon could find its applications in methods for microparticle manipulation and separation.
Citation:
Shape-dependent orientation of thermophoretic forces in microsystems 2013, 88 (3) Physical Review E
Journal:
Physical Review E
Issue Date:
24-Sep-2013
DOI:
10.1103/PhysRevE.88.033020
Type:
Article
ISSN:
1539-3755; 1550-2376
Additional Links:
http://link.aps.org/doi/10.1103/PhysRevE.88.033020
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorLi, Qien
dc.contributor.authorLiang, Tengfeien
dc.contributor.authorYe, Wenjingen
dc.date.accessioned2015-05-14T08:48:13Zen
dc.date.available2015-05-14T08:48:13Zen
dc.date.issued2013-09-24en
dc.identifier.citationShape-dependent orientation of thermophoretic forces in microsystems 2013, 88 (3) Physical Review Een
dc.identifier.issn1539-3755en
dc.identifier.issn1550-2376en
dc.identifier.doi10.1103/PhysRevE.88.033020en
dc.identifier.urihttp://hdl.handle.net/10754/552836en
dc.description.abstractIt is generally acknowledged that the direction of the thermophoretic force acting on microparticles is largely determined by the imposed temperature gradient, and the shape of the microparticle has little influence on its direction. We show that one type of thermophoretic force, emerged due to the advent of microfabrication techniques, is highly sensitive to object shape, and it is feasible to tune force orientation via proper shape design. We reveal the underlying mechanism by an asymptotic analysis of the Boltzmann equation and point out the reason why the classical thermophoretic force is insensitive to the particle shape, but the force in microsystems is. The discovered phenomenon could find its applications in methods for microparticle manipulation and separation.en
dc.relation.urlhttp://link.aps.org/doi/10.1103/PhysRevE.88.033020en
dc.rightsArchived with thanks to Physical Review Een
dc.titleShape-dependent orientation of thermophoretic forces in microsystemsen
dc.typeArticleen
dc.identifier.journalPhysical Review Een
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionDepartment of Mechanical Engineering, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kongen
dc.contributor.institutionKAUST-HKUST Micro/Nanofluidic Joint Laboratory, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kongen
kaust.grant.fundedcenterKAUST-HKUST Micro/Nanofluidic Joint Laboratoryen
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