Temperature-free mass tracking of a levitated nanoparticle  

作　　者：田原 郑瑜 刘吕航 郭光灿 孙方稳 Yuan Tian;Yu Zheng;Lyu-Hang Liu;Guang-Can Guo;Fang-Wen Sun(CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei 230026,China;CAS Center for Excellence in Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei 230026,China [2]CAS Center for Excellence in Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China

出　　处：《Chinese Physics B》2023年第7期171-176,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.12104438 and 62225506);CAS Project for Young Scientists in Basic Research(Grant No.YSBR-049);the Fundamental Research Funds for the Central Universities.

摘　　要：Mass measurement is an essential analytical tool in the characterization of materials.Here we present a method for measuring the mass of an individual nanoparticle which has a fg-level mass.This method enables a temperatureindependent mass measurement with the assistance of a sinusoidal electrostatic driving force.With this approach,we successfully track the change in properties of an optically levitated nanoparticle,such as mass,temperature,and electric charge,with air pressure.An abrupt change in the mass of silica nanoparticles is found to violate the Zhuravlev model.This method can be utilized to extend the mass analysis of materials,such as thermogravimetric analysis,to individual microor nano-particles.

关 键 词：optical levitation NANOPARTICLE mass measurement thermal desorption 

分 类 号：TB383.1[一般工业技术—材料科学与工程]