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A study of the acoustical radiation force considering attenuation


, : A study of the acoustical radiation force considering attenuation. SCIENCE CHINA Physics, Mechanics & Astronomy 56(7): 1237-1245

Acoustical tweezer is a primary application of the radiation force of a sound field. When an ultrasound focused beam passes through a micro-particle, like a cell or living biological specimens, the particle will be manipulated accurately without physical contact and invasion, due to the three-dimensional acoustical trapping force. Based on the Ray acoustics approach in the Mie regime, this work discusses the effects on the particle caused by Gaussian focused ultrasound, studies the acoustical trapping force of spherical Mie particles by ultrasound in any position, and analyzes the numerical calculation on the two-dimensional acoustical radiation force. This article also analyzes the conditions for the acoustical trapping phenomenon, and discusses the impact of the initial position and size of the particle on the magnitude of the acoustical radiation force. Furthermore, this paper considers the ultrasonic attenuation in a particle in the case of two-dimension, studies the attenuation s effects on the acoustical trapping force, and amends the calculation to the ordinary case with attenuation.

US$19.90

DOI: 10.1007/s11433-013-5115-4


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