Direct measurement of thermophoretic and photophoretic force acting on hot micromotors with optical tweezers; Applied Surface Science; Vol. 549

Direct measurement of thermophoretic and photophoretic force acting on hot micromotors with optical tweezers; Applied Surface Science; Vol. 549

Bibliographic Details
Parent link:Applied Surface Science
Vol. 549.— 2021.— [149319, 10 p.]
Corporate Authors: Национальный исследовательский Томский политехнический университет Инженерная школа ядерных технологий Научно-образовательный центр Б. П. Вейнберга, Национальный исследовательский Томский политехнический университет Инженерная школа ядерных технологий Лаборатория плазменных гибридных систем
Other Authors: Frueh J. С. Johannes Christoph, Rutkowski S. Sven, Si T. Tieyan, Ren Yu. Yuxuan, Gay M. Meyu, Tverdokhlebov S. I. Sergei Ivanovich, Qiu G. Guangyu, Schmitt J. Jean, He Q. Qiang, Wang J. Jing
Summary:Title screen
Synthetic microparticles present exciting features owing to their customizable light-matter interaction. We hereby report on the optical trapping of two artificial plasmonic microparticles: one with isotropic nanoparticles covering the surface (homogeneous particle) used as a hot Brownian particle and an anisotropic Janus microparticle, half coated with a gold nano-layer. The homogeneous particle decorated with plasmonic nanoparticles on the surface displays features of hot Brownian dynamics as well as photophoretic motion along z dimension in the optical trap. A dielectric particle was used as a reference particle because it acts as a cold particle with only the gradient force affecting it. In general, Janus particles orient in the trap with the dielectric part in the trap center. Plasmonic gold nanostructures absorb the light energy and produce heat; the photothermal forces significantly affect the optical trapping. These hot microspheres display temperature and Janus orientation dependent position distribution significantly different from cold (purely dielectric) microparticles. The developed method allows for the first time direct determination of the photophoretic (thermal force along light propagation direction) and thermophoretic force (light propagation direction independent force) acting on the respective particles, which opens new paths for analysis and control of micromachines.
Режим доступа: по договору с организацией-держателем ресурса
Language:English
Published: 2021
Subjects:
электронный ресурс
труды учёных ТПУ
micromotor
photophoresis
thermophoresis
hot brownian particle
janus particle
optical tweezers
термофорез
броуновские частицы
Online Access:https://doi.org/10.1016/j.apsusc.2021.149319
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=664385

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