Development of Odor-Sensors Based on Sensory Test

目前的气敏元件的性能是基于电导率的变化，而电导率的变化是由电子给体气体如H_2S和硫醇在电沉积的聚苯薄膜表面的吸附所影响的。证实了目前的气敏元件对低浓度的H_2S或硫醇具有较强的检测能力。对H_2S和H_2S的敏感特性。硫醇也用可溶的二茂铁衍生物进行了研究。结果表明，该气敏元件在室温下可以检测到低浓度的H_2S和硫醇，并且对H_2S和硫醇的存在有较快的电流响应。这些结果表明，在室温下，H_2S或硫醇很容易在薄膜表面上吸附和脱附。以CaCl2为支持电解液，采用恒流阴极极化的方法，在镀铟/氧化锡(ITO)玻璃电极上制备了On和Co酞菁薄膜。该传感器的性能是基于电导率的变化，而电导率的变化是由于接受气体如NO2和SO2在其表面的吸附而引起的。已经证实，目前的气体传感器可以检测到ppm水平的NO_2或SO_2。

The performance of the present gas-sensors is based on the change of electric conductivity which is affected by the adsorption of electron-donor gases such as H_2S and mercaptan on the surface of the electrodeposited perylene film. It was confirmed that the present gas-sensors were detectable to low concentration of H_2S or mercaptan. The sensing properties to H_2S and. mercaptan were also investigated using soluble perylene derivatives. It was confirmed that low concentrations of H2S and mercaptan was detectable by the gas-sensor at room temperature and the current responses to the existence of H_2S and mercaptan were considerably quick These results suggest that adsorption and desorption of H_2S or mercaptan on the surfaces of film is easily achieved at room temperature. On and Co phthalocyanine films on indium/tin oxide (ITO) coated glass electrodes were prepared by cathodical polarization of the electrolytic solution containing CaCl_2 as a supporting electrolyte with a constant current The performance of the present gas-sensors is based on the change of electrical conductivity which is affected by the adsorption of acceptor gases such as NO_2 and SO_2 on the surface of the phthalocyanine film. It was confirmed that the present gas-sensors were detectable to ppm levels of NO_2 or SO_2.