Ultrasonic particle trapping in microfluidic devices using soft lithography

S. S. Guo, L. B. Zhao, K. Zhang, Kwok Ho Lam, S. T. Lau, X. Z. Zhao, Y. Wang, H. L W Chan, Y. Chen, D. Baigl

Research output: Journal article publicationJournal articleAcademic researchpeer-review

16 Citations (Scopus)


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.
Original languageEnglish
Article number213901
JournalApplied Physics Letters
Issue number21
Publication statusPublished - 6 Jun 2008

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


Dive into the research topics of 'Ultrasonic particle trapping in microfluidic devices using soft lithography'. Together they form a unique fingerprint.

Cite this