title: An integrated microfluidic chip with 40 MHz lead-free transducer for fluid analysis.
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 [(Ba(0.95)Sr(0.05))(Zr(0.05)Ti(0.95))O(3), 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.
authors.affiliation: Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong. felix_leo6288@hotmail.com
authors.forename: S T F
authors.initials: ST
authors.lastname: Lee
authors.forename: K H
authors.initials: KH
authors.lastname: Lam
authors.forename: L
authors.initials: L
authors.lastname: Lei
authors.forename: X M
authors.initials: XM
authors.lastname: Zhang
authors.forename: H L W
authors.initials: HL
authors.lastname: Chan
mesh_terms: D000438:Alcohols / Q000737:chemistry; D002516:Ceramics / Q000737:chemistry; D004129:Dimethylpolysiloxanes / Q000737:chemistry; D004867:Equipment Design; D046210:Microfluidic Analytical Techniques / Q000295:instrumentation*; D011189:Potassium Chloride / Q000737:chemistry; D011327:Printing; D012965:Sodium Chloride / Q000737:chemistry; D018511:Systems Integration; D014159:Transducers; D014867:Water / Q000737:chemistry
chemical_list: D000438:Alcohols; D004129:Dimethylpolysiloxanes; D014867:Water; D012965:Sodium Chloride; C013830:baysilon; D011189:Potassium Chloride