Active motion of a Janus particle by self-thermophoresis in a defocused laser beam

Hong Ren Jiang, Natsuhiko Yoshinaga, Masaki Sano

研究成果: Article査読

607 被引用数 (Scopus)

抄録

We study self-propulsion of a half-metal coated colloidal particle under laser irradiation. The motion is caused by self-thermophoresis: i.e., absorption of a laser at the metal-coated side of the particle creates local temperature gradient which in turn drives the particle by thermophoresis. To clarify the mechanism, temperature distribution and a thermal slip flow field around a microscale Janus particle are measured for the first time. With measured temperature drop across the particle, the speed of self-propulsion is corroborated with the prediction based on accessible parameters. As an application for driving a micromachine, a microrotor is demonstrated.

本文言語English
論文番号268302
ジャーナルPhysical review letters
105
26
DOI
出版ステータスPublished - 2010 12 20
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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