中国物理B ›› 2023, Vol. 32 ›› Issue (7): 74207-074207.doi: 10.1088/1674-1056/accb4c

• • 上一篇    下一篇

Temperature-free mass tracking of a levitated nanoparticle

Yuan Tian(田原)1,2, Yu Zheng(郑瑜)1,2,†, Lyu-Hang Liu(刘吕航)1,2, Guang-Can Guo(郭光灿)1,2, and Fang-Wen Sun(孙方稳)1,2   

  1. 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
  • 收稿日期:2023-02-22 修回日期:2023-03-23 接受日期:2023-04-07 出版日期:2023-06-15 发布日期:2023-06-21
  • 通讯作者: Yu Zheng E-mail:bigz@ustc.edu.cn
  • 基金资助:
    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), and the Fundamental Research Funds for the Central Universities.

Temperature-free mass tracking of a levitated nanoparticle

Yuan Tian(田原)1,2, Yu Zheng(郑瑜)1,2,†, Lyu-Hang Liu(刘吕航)1,2, Guang-Can Guo(郭光灿)1,2, and Fang-Wen Sun(孙方稳)1,2   

  1. 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
  • Received:2023-02-22 Revised:2023-03-23 Accepted:2023-04-07 Online:2023-06-15 Published:2023-06-21
  • Contact: Yu Zheng E-mail:bigz@ustc.edu.cn
  • Supported by:
    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), and 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 temperature-independent 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 micro- or nano-particles.

关键词: optical levitation, nanoparticle, mass measurement, thermal desorption

Abstract: 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 temperature-independent 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 micro- or nano-particles.

Key words: optical levitation, nanoparticle, mass measurement, thermal desorption

中图分类号:  (Mechanical effects of light on material media, microstructures and particles)

  • 42.50.Wk
06.30.Dr (Mass and density) 82.60.Qr (Thermodynamics of nanoparticles)