Pharmaceutica Analytica Acta

Micro/nano fluid handling system using surface acoustic wave

International Conference and Exhibition on Advances in HPLC & Chromatography Techniques

March 14-15, 2016 London, UK

Hiroki Kuwano

Tohoku University, Japan

Scientific Tracks Abstracts: Pharm Anal Acta

Abstract:

Micro/nano fluid handling system using surface acoustic wave (SAW) is described for medical/bio, chemical synthesis; analysis and so on. We developed an atomizer and micro pump using SAW for a converged mist spray with a sustained liquid supply mechanism. The atomizer can produce a narrow mist spray of sub-millimeter width. The atomized mist spray converges spontaneously and thus requires no additional spray converging system. Key features in achieving the self-converging atomization are two-port interdigital transducers (IDTs) with a groove in between. The SAW is driven by applying an electric field on IDTs patterned on a piezoelectric substrate. The two-port IDTs drive SAWs in opposite directions toward the groove, which then separates the SAWdriven streaming on each side of the groove. Two types of self-converging atomizer were experimentally demonstrated, a line and a point atomizer. While the former uses parallel IDTs to atomize water from the groove into a thin-planar-shaped spray, the latter uses arc-shaped SAW lenses to focus the SAW into a certain point in the groove to atomize water into a narrow point spray. The developed micropumps consisted of an epoxy-based reservoir with an exhaust slot and a pair of interdigital transducers (IDTs). The liquid supply from the reservoir was controlled by SAW bursts from the IDTs. A micro tank was fabricated into the exhaust slot to stabilize the atomization. In the operational test of the micropump with water, a transfer rate of 0.24 pl per single burst was confirmed.

Biography :

Hiroki Kuwano received his BEng. and MEng. degree in Mechanical Engineering and PhD in Electrical Engineering from Tohoku University in 1975, 1977 and 1990, respectively. He was working for Nippon Telephone and Telegraph Public Corporation (NTT) for 26 years. Since 2003, he has been a Professor at Tohoku University. His research interests are nano-energy systems, sensor networks and surface acoustic wave devices. He was the recipient of the NTT President Award in 1993 and 1994 and the Best Paper Award of The Japanese Society for Precision Engineering in 1997.

Email: hiroki.kuwano@nanosys.mech.tohoku.ac.jp