有機電解質の薄膜を用いる交流検出型気体センサの研究

有机电解质薄膜交流检测型气体传感器的研究

基本信息

批准号：
01850172
负责人：
TAKAGI Makoto
金额：
$ 4.03万
依托单位：
Kyushu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B).
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1989
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01850172/
关键词：
Chemical Sensor Electrochemical Signal Transformation Functional Material Synthetic Bilayer Lipid Membrane Humidity Sensor Bifunctional Alkanethiol Ammonia Gas Sensor 細胞膜化学感覚バイオミメティックセンサ

项目摘要

Title : Development of Electrochemical Gas Sensors based on an Electrical Impedance Characteristics of a Surface-modified ElectrodeElectrochemical gas sensors based on an electrical impedance measurement were investigated. An electrode surface was modified with a thin film which was composed of organic functional material ; change in an electrical impedance property of the probe due to a chemical interaction between the surface film and analytes was utilized as sensory principle.The present study consists from two parts. First, with using a synthetic, molecular-bilayer forming amphiphile, we developed a humidity sensor. A transparent thin multi-bilayer film was fabricated on patterned gold electrodes of interdigitated form. An electrical response to humidity change was obtained by using an automatic impedance analyzer. Response time of the sensor was within several minutes, and the sensor showed a good reproducibility.Next, we synthesized new, bifunctional, long-chain alkanethiols which contain an organic functional group for fabrication of surfaces of electrodes. With using a 18-crown-6 derivative of dialkyl disulfide, an ammonia sensor was developed. A molecular film was adsorbed on a silver electrode surface, and the electrical response was obtained by using an impedance meter. The sensor gave a steady-state response in a few minutes after exposure to a sample gas, and the determination of ammonia gas at around ppm revel was possible. The detection limit was 2 ppm, and interference by organic gases such as benzene and chloroform was not observed.

标题：基于表面改性电极的电阻抗特性开发电化学气体传感器研究了基于电阻抗测量的电化学气体传感器。电极表面修饰有机功能材料薄膜；由于表面膜和分析物之间的化学相互作用而引起的探针电阻抗特性的变化被用作传感原理。本研究由两部分组成。首先，我们使用合成的分子双层形成两亲物开发了湿度传感器。在叉指形式的图案化金电极上制备透明多层双层薄膜。通过使用自动阻抗分析仪获得对湿度变化的电响应。传感器的响应时间在几分钟之内，并且传感器表现出良好的重现性。接下来，我们合成了新型双功能长链烷硫醇，其含有有机官能团，用于电极表面的制备。利用二烷基二硫醚的18-冠-6衍生物，开发了氨传感器。将分子膜吸附在银电极表面，并使用阻抗计获得电响应。该传感器在暴露于样品气体后几分钟内给出稳态响应，并且可以在 ppm 水平左右测定氨气。检测限为2 ppm，未观察到苯、氯仿等有机气体的干扰。