Controlled rotation of sound-trapped small particles by an acoustic needle

被引：34

作者：

Hu, JH ^{[1
]}

Tay, CL ^{[1
]}

Cai, YM ^{[1
]}

Du, JL ^{[1
]}

机构：

[1] Nanyang Technol Univ, Div Microelect, Sch Elect & Elect Engn, Singapore 639798, Singapore

来源：

APPLIED PHYSICS LETTERS | 2005年 / 87卷 / 09期

关键词：

D O I：

10.1063/1.2034106

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We show that an acoustic needle, mechanically driven by an ultrasonic transducer in air, can rotate sound-trapped small particles around its tip in water. The rotation is very stable when sound field around the tip is appropriate. For an acoustic needle at a given location in a sound field, the revolution speed of trapped particles can be controlled by the acoustic pressure near the tip or by driving voltage and frequency of the ultrasonic transducer. For Flying Color seeds, a revolution speed larger than 300 rpm can be obtained. (c) 2005 American Institute of Physics.

引用

页数：3

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