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Title: Patterning and manipulating microparticles into a three-dimensional matrix using standing surface acoustic waves
Authors: Nguyen, Tan Dai
Tran, Van Thai
Fu, Yong Qing
Du, Hejun
Keywords: Microparticles
Standing Surface Acoustic Waves
DRNTU::Engineering::Mechanical engineering
Issue Date: 2018
Source: Nguyen, T. D., Tran, V. T., Fu, Y. Q., & Du, H. (2018). Patterning and manipulating microparticles into a three-dimensional matrix using standing surface acoustic waves. Applied Physics Letters, 112(21), 213507-. doi:10.1063/1.5024888
Series/Report no.: Applied Physics Letters
Abstract: A method based on standing surface acoustic waves (SSAWs) is proposed to pattern and manipulate microparticles into a three-dimensional (3D) matrix inside a microchamber. An optical prism is used to observe the 3D alignment and patterning of the microparticles in the vertical and horizontal planes simultaneously. The acoustic radiation force effectively patterns the microparticles into lines of 3D space or crystal-lattice-like matrix patterns. A microparticle can be positioned precisely at a specified vertical location by balancing the forces of acoustic radiation, drag, buoyancy, and gravity acting on the microparticle. Experiments and finite-element numerical simulations both show that the acoustic radiation force increases gradually from the bottom of the chamber to the top, and microparticles can be moved up or down simply by adjusting the applied SSAW power. Our method has great potential for acoustofluidic applications, building the large-scale structures associated with biological objects and artificial neuron networks.
ISSN: 0003-6951
DOI: 10.1063/1.5024888
Schools: School of Mechanical and Aerospace Engineering 
Research Centres: Singapore Centre for 3D Printing 
Rights: © 2018 The Author(s) . All rights reserved. This paper was published by AIP Publishing in Applied Physics Letters and is made available with permission of The Author(s) .
Fulltext Permission: open
Fulltext Availability: With Fulltext
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