Switching between laser-induced thermophoresis and thermal convection of liquid suspension in a microgap with variable dimension.
Laser heating
Particle accumulation
Thermal convection
Thermal optofluidics
Thermophoresis
Journal
Electrophoresis
ISSN: 1522-2683
Titre abrégé: Electrophoresis
Pays: Germany
ID NLM: 8204476
Informations de publication
Date de publication:
11 2021
11 2021
Historique:
revised:
25
06
2021
received:
26
04
2021
accepted:
13
07
2021
pubmed:
17
7
2021
medline:
22
12
2021
entrez:
16
7
2021
Statut:
ppublish
Résumé
Phoretic motion of particles along a temperature gradient formed in a fluid, known as thermophoresis, often takes place under the influence of bulk motion caused by thermal convection. In this paper, using a laser heating method, the significance of two competing effects, that is, thermophoresis and thermal convection, for the particle transport in a liquid phase confined in a microgap is investigated experimentally by changing the gap size as a control parameter. It is found that there is a threshold of the gap size, above which the particles tend to accumulate around the heated spot, forming a ring-like particle distribution. On the contrary, if the gap size is below the threshold, the particles are depleted from the heated spot. Switching between these accumulation and depletion modes is expected to develop novel manipulation techniques.
Identifiants
pubmed: 34269479
doi: 10.1002/elps.202100118
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
2401-2409Informations de copyright
© 2021 Wiley-VCH GmbH.
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