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Proceedings Paper

PMN-PT single crystal resonators for sensing acetone vapors
Author(s): Michael Frank; Tricia T. Nguyen; Fredrick M. Makau; Kee S. Moon; Samuel Kassegne
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Paper Abstract

This paper compares frequency measurements in lead magnesium niobate-lead titanate (PMN-PT) resonators with conventional quartz crystal microbalance (QCM) resonators when exposed to acetone vapors under identical test conditions. A pumpless mechanism for driving acetone vapors by convection force was developed in our experimental setup. The frequency shift recorded in response to acetone vapor exposure for the PMN-PT resonator was more than 10,000 times larger than for the QCM resonator. Our experimental results reinforce the notion that PMN-PT resonators could be a superior replacement for QCM resonators in a variety of biosensor applications. The experimental setup heated water to produce acetone vapors, a volatile organic chemical, which were delivered to a sensing chamber to interact with the sensing unit. Chemical vapors were driven toward the sensing unit and circulated through the system via a pumpless mechanism by the principle of convection. Both types of resonators displayed a change in frequency as acetone vapors were applied, but PMN-PT showed a more significant change by several orders of magnitude.

Paper Details

Date Published: 17 November 2008
PDF: 8 pages
Proc. SPIE 7266, Optomechatronic Technologies 2008, 72660U (17 November 2008); doi: 10.1117/12.807416
Show Author Affiliations
Michael Frank, San Diego State Univ. (United States)
Tricia T. Nguyen, San Diego State Univ. (United States)
Fredrick M. Makau, San Diego State Univ. (United States)
Kee S. Moon, San Diego State Univ. (United States)
Samuel Kassegne, San Diego State Univ. (United States)

Published in SPIE Proceedings Vol. 7266:
Optomechatronic Technologies 2008

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