An integrated microfluidic chip with 40 MHz lead-free transducer for fluid analysis

Lee, S.T.F., Lam, K.H. , Lei, L., Zhang, X.M. and Chan, H.L.W. (2011) An integrated microfluidic chip with 40 MHz lead-free transducer for fluid analysis. Review of Scientific Instruments, 82(2), (doi: 10.1063/1.3553575) (PMID:21361626)

Abstract

The design, fabrication, and evaluation of a high-frequency transducer made from lead-free piezoceramic for the application of microfluidic analysis is described. Barium strontium zirconate titanate [(Ba0.95Sr0.05)(Zr0.05Ti0.95)O3, abbreviated as BSZT] ceramic has been chosen to be the active element of the transducer. The center frequency and bandwidth of this high-frequency ultrasound transducer have been measured to be 43 MHz and 56.1%, respectively. The transducer was integrated into a microfluidic channel and used to measure the sound velocity and attenuation of the liquid flowing in the channel. Results suggest that lead-free high-frequency transducers could be used for in situ analysis of property of the fluid flowing through the microfluidic system.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Lam, Dr Koko
• Authors: Lee, S.T.F., Lam, K.H., Lei, L., Zhang, X.M., and Chan, H.L.W.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: Review of Scientific Instruments
• Publisher: American Institute of Physics
• ISSN: 0034-6748
• ISSN (Online): 1089-7623