论文期刊

Controllable Micro-Particle Rotation and Transportation Using Sound Field Synthesis Technique




作者: Shuang Deng,Kun Jia*,Eryong Wu,Xuxiao Hu,Zongwei Fan,Keji Yang
发表/完成日期: 2018-01-08
期刊名称: Applied science
期卷:
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论文简介
Rotation and transportation of micro-particles using ultrasonically-driven devices shows
promising applications in the fields of biological engineering, composite material manufacture, and
micro-assembly. Current interest in mechanical effects of ultrasonic waves has been stimulated by the
achievements in manipulations with phased array. Here, we propose a field synthesizing method
using the fewest transducers to control the orientation of a single non-spherical micro-particle as
well as its spatial location. A localized acoustic force potential well is established and rotated by
using sound field synthesis technique. The resultant acoustic radiation torque on the trapped target
determines its equilibrium angular position. A prototype device consisting of nine transducers
with 2 MHz center frequency is designed and fabricated. Controllable rotation of a silica rod
with 90 m length and 15 m diameter is then successfully achieved. There is a good agreement
between the measured particle orientation and the theoretical prediction. Within the same device,
spatial translation of the silica rod can also be realized conveniently. When compared with the
existing acoustic rotation methods, the employed transducers of our method are strongly decreased,
meanwhile, device functionality is improved
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