摘要
An optical-tweezers-based dual-frequency-band particle tracking system was designed and fabricated for liquid viscositydetection. On the basis of the liquid viscosity dependent model of the particle’s restricted Brownian motion with theFax´en correction taken into account, the liquid viscosity and optical trap stiffness were determined by fitting the theoreticalprediction with the measured power spectral densities of the particle’s displacement and velocity that were derived from thedual-frequency-band particle tracking data. When the SiO2 beads were employed as probe particles in the measurements ofdifferent kinds of liquids, the measurement results exhibit a good agreement with the reported results, as well as a detectionuncertainty better than 4.6%. This kind of noninvasive economical technique can be applied in diverse environments forboth in situ and ex situ viscosity detection of liquids.
作者
Lihua Yan
Boyin Xue
Yuanji Li
Jinxia Feng
Xingkang Wu
Kuanshou Zhang
闫丽华;薛博引;李渊骥;冯晋霞;武兴康;张宽收(State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Opto-Electronics,Shanxi University,Taiyuan 030006,China;Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China;Modern Research Center for Traditional Chinese Medicine,Shanxi University,Taiyuan 030006,China)
基金
the National NaturalScience Foundation of China (Grant No. 62175135)
theSpecial Foundation of Local Scientific and TechnologicalDevelopment Guided by Central Government (GrantNo. YDZJSX20231A006)
the Fundamental ResearchProgram of Shanxi Province (Grant No. 202103021224025).
