操控金属粒子的光镊技术

金属微粒由于其独特的化学以及电磁性质, 在生物医学和表面化学领域的应用越来越广泛, 利用光镊俘获金属微粒的报道也越来越多, 可操控的金属粒子尺寸也越来越小。光镊作为一种重要的捕获微小粒子的工具, 在早期多用来捕获胶体颗粒及生物细胞等透明粒子, 很少有报道用光镊来捕获像金属粒子一类的不透明粒子。综合了近年来出现的利用光镊俘获金属粒子的技术, 从原理、实验设备、实验环境等方面对现有俘获金属粒子的技术做一个全面的介绍。

Abstract

Metallic particles have many special chemical and electromagnetic properties compared with dielectric particles, and their potential applications in biology and surface chemistry are ravishing. So scientists and technicians have tremendous interest to develop technologies of trapping metallic particles. As a very important technique, optical tweezers were mostly used to trap transparent particles in the past, especially biological cells. Since metallic particles are opaque, it is difficult for trapping them by common optical tweezers. In recent years, there are more and more exciting reports about trapping metallic particles using optical tweezers. The development of trapping metallic particles using optical tweezers in trapping principles, experiments and equipments, is introduced.

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陈冠雄, 周金华, 任煜轩, 李银妹. 操控金属粒子的光镊技术[J]. 激光与光电子学进展, 2009, 46(6): 32. Chen Guanxiong, Zhou Jinhua, Ren Yuxuan, Li Yinmei. Manipulating Metallic Particles Using Optical Tweezers[J]. Laser & Optoelectronics Progress, 2009, 46(6): 32.

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