Opto-thermoelectric microswimmers
作者机构：Materials Science&Engineering Program and Texas Materials InstituteThe University of Texas at AustinAustinTX 78712USA Walker Department of Mechanical EngineeringThe University of Texas at AustinAustinTX 78712USA State Key Laboratory of Precision Measurement Technology and InstrumentsDepartment of Precision InstrumentTsinghua UniversityBeijing 100084People’s Republic of China
出 版 物：《Light(Science & Applications)》 (光（科学与应用)（英文版）)
年 卷 期：2020年第9卷第1期
页 面：674-685页
核心收录：
学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学]
基 金：the financial support of the Army Research Office(W911NF-17-1-0561) the National Science Foundation-Civil,Mechanical and Manufacturing Innovation(1761743) the National Aeronautics and Space Administration(80NSSC17K0520) the National Institute of General Medical Sciences of the National Institutes of Health(DP2GM128446) financial support from the State Key Laboratory of Precision Measurement Technology and Instruments
主 题：rotation illumination beam
摘 要：Inspired by the“run-and-tumblebehaviours of Escherichia coli(***)cells,we develop opto-thermoelectric *** microswimmers are based on dielectric-Au Janus particles driven by a self-sustained electrical field that arises from the asymmetric optothermal response of the *** illumination by a defocused laser beam,the Janus particles exhibit an optically generated temperature gradient along the particle surfaces,leading to an opto-thermoelectrical field that propels the *** further discover that the swimming direction is determined by the particle *** enable navigation of the swimmers,we propose a new optomechanical approach to drive the in-plane rotation of Janus particles under a temperature-gradient-induced electrical field using a focused laser *** the rotation laser beam allows us to position the particles at any desired orientation and thus to actively control the swimming direction with high *** incorporating dark-field optical imaging and a feedback control algorithm,we achieve automated propelling and navigation of the *** optothermoelectric microswimmers could find applications in the study of opto-thermoelectrical coupling in dynamic colloidal systems,active matter,biomedical sensing,and targeted drug delivery.
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