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Reference type: Journal
Authors: Hoang S-H, Horng D-G, Chiang C-Y, Ko C-H, Lo Y-C, Chen C-I, Chang C-K
Article Title: A novel measurement device for SAW chemical sensors with FT-IR spectro-microscopic analytical capability.
Publication date: 2004
Journal: Tamkang Journal of Science and Engineering
Volume: 7
Issue: (2)
Page numbers: 99-102.
Alternative URL: http://www2.tku.edu.tw/~tkjse/7-2/7-2-9.pdf

Abstract: In this paper, we propose a novel characterization technique of the SAW chemical sensors. It combines the technique of electronic frequency shifting measurement (phase lock lop) with the IR microscopic spectral analyzer and performs a in-situ measurement. Using this method, we could conduct ultrahigh sensitive measurement in mass change (a few ppb-a few ppm range) of the SAW chemical sensors by cross-compared with the electronic signals of the SAW device and the FT-IR spectro-microscopic data of the molecular imprinted polymer (MIP) recognition thin film which deposit on the surface of the SAW device. With the use of the MIP thin films, we are able to provide a more accurate molecular selectivity than those current SAW chemical sensors which were based on regular chemical absorb films. Spectrum results of MIP films will be presented below.

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