Title: Fabrication and characterization of IrO2-based microsensors for fast detection of carbon dioxide
Authors: Lue, JC
Chao, SC
交大名義發表
電子物理學系
National Chiao Tung University
Department of Electrophysics
Keywords: CO2 microsensor;sputtered IrO2;insertion compound;poly(vinylalcohol)
Issue Date: 1-Apr-1997
Abstract: A pair of closely spaced IrO2 electrodes covered by a polymer film is employed as a new solid-state microsensor fur CO2 gas at 1 atm and room temperature. Its function is based on IrO2 sensitivity to the pH-lowering effect produced by CO2 equilibration in the polymer film. This sensitivity is made ''asymmetric'' by leaving one IrO2/polymer ''masked'' to CO2 gas exposure. The potential difference is measured and found to be reversible and reproducible for the concentration determination of CO2 between similar to 0.1-100% CO2 in N-2. Since the microsensor shows fast response, it can also be employed in transient flow-injection experiments for the volumetric analysis of CO2. When calibrated carefully and used with care, the new microsensor based on IrO2 is capable of measuring either the concentration or volume of CO2 with high precision and negligible baseline drift.
URI: http://dx.doi.org/10.1143/JJAP.36.2292
http://hdl.handle.net/11536/627
ISSN: 0021-4922
DOI: 10.1143/JJAP.36.2292
Journal: JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS
Volume: 36
Issue: 4A
Begin Page: 2292
End Page: 2297
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