南京大学学报（自然科学版）Issue(6)：1166-1173,8.DOI:10.13232/j.cnki.jnju.2015.06.011
声流中力学特性的实验研究
The experimental study of mechanics characteristics in acoustic streaming
摘要
Abstract
Acoustic tweezers can manipulate and filter particles like cells.Under the control of acoustic tweezers, particles can be arranged in the orbits when their parameters are set.Acoustic tweezers can select and manipulate cells and particles effectively,regardless of their shapes,sizes or electrical properties.As the energy density of acoustic tweezersis being far lower than that of optical tweezers,it will not hurt living cells,and acoustic tweezers have the advantages of simple structure,small volume,low costs,multi-functional and non-contact operation characters which gives acoustic tweezers good biocompatibility.These advantages will ensure acoustic tweezers play an important role in materials,biology,medical research and other fields.In this paper,we developed the interdigital transducers of 20 MHz to manipulate water soluble silicone oil droplets and fluorescence polystyrene particles.We studied the function of surface plane wave and surface standing wave on the droplets and the polystyrene particles re-spectively.As a result,the polystyrene particles are successfully trapped in the nodal positions,and the four-quadrant acoustic streaming patterns are observed,verifying the existence of Rayleigh acoustic streaming.Furthermore,we measured the force of acoustic streaming acting on the plate and concluded the relationship between the function of acoustic streaming and the power of signal applied to the acoustic tweezers.关键词
声镊子/行波场/驻波场/声表面波/声流/声辐射力Key words
acoustic tweezers/plane wave/standing wave/surface acoustic wave/acoustic streaming/radiation force分类
数理科学引用本文复制引用
周伟,毛一葳,刘杰惠,刘晓宙,龚秀芬..声流中力学特性的实验研究[J].南京大学学报（自然科学版）,2015,(6):1166-1173,8.基金项目
国家自然科学基金(11274166,11474160) （11274166,11474160）
