Ultrasonic particle trapping in microfluidic devices using soft lithography

Guo, S.S., Zhao, L.B., Zhang, K., Lam, K.H. , Lau, S.T., Zhao, X.Z., Wang, Y., Chan, H.L.W., Chen, Y. and Baigl, D. (2008) Ultrasonic particle trapping in microfluidic devices using soft lithography. Applied Physics Letters, 92(21), 213901. (doi: 10.1063/1.2937910)

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 (⁠400nm to 10μm 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.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Lam, Dr Koko
• Authors: Guo, S.S., Zhao, L.B., Zhang, K., Lam, K.H., Lau, S.T., Zhao, X.Z., Wang, Y., Chan, H.L.W., Chen, Y., and Baigl, D.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: Applied Physics Letters
• Publisher: American Institute of Physics
• ISSN: 0003-6951
• ISSN (Online): 1077-3118