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Title: Particle trapping for acoustic tweezers
Authors: Yu, Y
Qiu, W
Sun, L 
Issue Date: Oct-2011
Source: IEEE International Ultrasonics Symposium 2011 (IUS 2011) : proceedings : Florida, USA, October 18-21, 2011, p. 1533-1536
Abstract: The optical tweezers has been found to have many biomedical applications in trapping macromolecules and cells. A recent theoretical study has shown that under appropriate conditions acoustic trapping is also possible [1]. Compared to the optical tweezers, the acoustic tweezers is more useful in light opaque media. In this paper, first we present the range where a particle can be trapped in single focused field along the axial direction from a 100MHz concave circular transducer on various sizes of particles. Secondly, we also proposed a multitrap model of acoustic tweezers which can trap 4 particles simultaneously. A 100MHz 2-D phased array with each line composed of 80 elements was used to generate and control the multiple-focus acoustic field. Both of the two fields generated by concave circular and phased array transducer were evaluated based on finite-element model. The radiation force was computed by the momentum transfer occurs between the mediums inside and outside the particle according to the law of conservation. The result demonstrates that the acoustic tweezers not only can manipulate larger particles, but also owns the feasibility of multitrap.
Keywords: Acoustic fields
Finite element method
Medical applications
Optical tweezers
Publisher: IEEE Ultrasonics, Ferroelectrics, and Frequency Control Society
ISSN: 1948-5719
DOI: 10.1109/ULTSYM.2011.0380
Rights: © 2011 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
The following publication Yu, Y., Qiu, W., & Sun, L. (2011). Particle trapping for acoustic tweezers. Paper presented at the IEEE International Ultrasonics Symposium, IUS, 1533-1536 is available at
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