Chemical identification using an impedance sensor based on dispersive charge transport
作者： Richard D. Yang , Bernd Fruhberger , Jeongwon Park , Andrew C. Kummel
DOI: 10.1063/1.2175491
关键词: Analytical chemistry 、 Conductivity 、 Relaxation (NMR) 、 Analyte 、 Materials science 、 Dielectric spectroscopy 、 Thin film 、 Resonance 、 Organic semiconductor 、 Electrical resistivity and conductivity
摘要: Impedance spectroscopy has been used to identify analytes in semiconducting metallophthalocyanine thin films. Above a critical concentration, the magnitudes of high frequency conductivity changes are invariant with concentration but distinct for different and can be analyte identification. The analyte-induced ac above 5kHz have converted shifts circuit resonance differentiate methanol, ethanol, isopropanol vapors nitrogen carrier gas. consistent charge relaxation times.
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