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Controlled Mechanical Motions of Microparticles in Optical Tweezers

1 and 2,*
1
Institute of Laser and Intelligent Manufacturing Technology, South-Central University for Nationalities, Wuhan 430074, China
2
School of Physics and Optoelectronics, South China University of Technology, Guangzhou 510640, China
*
Author to whom correspondence should be addressed.
Micromachines 2018, 9(5), 232; https://doi.org/10.3390/mi9050232
Received: 15 April 2018 / Revised: 5 May 2018 / Accepted: 9 May 2018 / Published: 12 May 2018
(This article belongs to the Special Issue Optical Manipulation of Cells: Strategies and Devices)
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Abstract

Optical tweezers, formed by a highly focused laser beam, have intriguing applications in biology and physics. Inspired by molecular rotors, numerous optical beams and artificial particles have been proposed to build optical tweezers trapping microparticles, and extensive experiences have been learned towards constructing precise, stable, flexible and controllable micromachines. The mechanism of interaction between particles and localized light fields is quite different for different types of particles, such as metal particles, dielectric particles and Janus particles. In this article, we present a comprehensive overview of the latest development on the fundamental and application of optical trapping. The emphasis is placed on controllable mechanical motions of particles, including rotation, translation and their mutual coupling under the optical forces and torques created by a wide variety of optical tweezers operating on different particles. Finally, we conclude by proposing promising directions for future research. View Full-Text
Keywords: optical tweezers; mechanical motions; optical force; micromachine; Janus particles optical tweezers; mechanical motions; optical force; micromachine; Janus particles
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Liu, J.; Li, Z. Controlled Mechanical Motions of Microparticles in Optical Tweezers. Micromachines 2018, 9, 232.

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