微米-亚微米尺寸单液滴光镊测量技术  

Micrometer to Submicrometer-sized Single Droplet Optical Tweezer Measurement Techniques

作　　者：孙久乂 张韫宏 SUN Jiuyi;ZHANG Yunhong(School of Chemistry and Chemical Engineering,Beijing Institute of Technology,Beijing 100081)

机构地区：[1]北京理工大学化学与化工学院,北京100081

出　　处：《光散射学报》2024年第4期363-374,共12页The Journal of Light Scattering

基　　金：国家自然科学基金资助(42127806,91544223,91844301,21806169)。

摘　　要：微米-亚微米尺寸单液滴的操控与测量,是实现大气气溶胶复杂物理化学过程精确原位测量的关键,已成为精密仪器研发的新方向。光镊技术可以利用激光的光梯度力控制悬浮单液滴,单液滴的自发和受激拉曼信号提供了颗粒物理化学组成、浓度、折射率和半径等方面的信息,为大气气溶胶提供了一个独特的原位精确测量方法。本文介绍几种不同类型的光镊技术,及其自发和受激拉曼测量技术在大气气溶胶领域中的应用。The manipulation and measurement of single droplets,ranging from micrometer to submicrometer size,are essential for precise in situ characterization of complex physicochemical processes in atmospheric aerosols.This represents a new direction in precision instrument development.Optical tweezer technology is a unique method that uses the gradient force of lasers to control suspended single droplets,enabling in situ precise measurements.The spontaneous and stimulated Raman signals from these droplets provide detailed information on the physicochemical composition,concentration,refractive index,and radius of particles,which serve as a novel approach for studying atmospheric aerosols.This paper discusses some types of optical tweezer techniques and their applications in measuring spontaneous and stimulated Raman signals in the field of atmospheric aerosols.

关 键 词：单液滴 光镊 大气气溶胶 物理化学性质 

分 类 号：O433[机械工程—光学工程] O657[理学—光学]