Please use this identifier to cite or link to this item:
Title: Ultrasonic particle trapping in microfluidic devices using soft lithography
Authors: Guo, Shishang
Zhao, Libo
Zhang, K.
Lam, Kwok-ho
Lau, Sien Ting
Zhao, Xingzhong
Wang, Yu
Chan, Helen L. W.
Chen, Y.
Baigl, D.
Subjects: Microchannel flow
Micromechanical resonators
Particle size
Piezoelectric transducers
Soft lithography
Ultrasonic waves
Issue Date: 28-May-2008
Publisher: American Institute of Physics
Source: Applied physics letters, 28 May 2008, v. 92, 213901, p. 1-3
Abstract: We report on the feasible fabrication of microfluidic devices for noncontact particle trapping. A half-wavelength resonator was constructed using standard soft lithography to generate ultrasonic standing waves through a miniature piezoelectric transducer. Microparticles (400 nm to 10 µm in diameter) flowing through polydimethylsiloxane microchannels were efficiently trapped to levitate in the middle depth of a resonance cavity. Such a device could potentially offer a flexible platform for particle-based assays for a large variety of applications.
Rights: © 2008 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in S.S. Guo et al. Appl. Phys. Lett. 92, 213901 (2008) and may be found at
Type: Journal/Magazine Article
ISSN: 0003-6951
Appears in Collections:AP Journal/Magazine Articles

Files in This Item:
File Description SizeFormat 
lithography_08.pdf317.65 kBAdobe PDFView/Open

All items in the PolyU Institutional Repository are protected by copyright, with all rights reserved, unless otherwise indicated. No item in the PolyU IR may be reproduced for commercial or resale purposes.