Interdigitated electrode fabricated by integration of ink-jet printing with electroless plating and its application in gas sensor

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• 作者：Chun-Chieh Tseng^a ; ^b ; Yu-Hsien Chou^c ; Ting-Wei Hsieh^d ; Min-Wen Wang^e ; Youn-Yuen Shu^b ; Ming-Der Ger^d ; ^{mingderger@gmail.com}
• 关键词：Palladium nanoparticles ; Inkjet printing ; Electroless plating ; Interdigitated electrode ; Gas sensor
• 刊名：Colloids and Surfaces A ; Physicochemical and Engineering Aspects
• 出版年：2012
• 期刊代码：22_09277757
• 类别：ch
• 出版时间：20 May, 2012
• 卷：402
• 期：Complete
• 页码：45-52
• 文件大小：1587 K

摘要

A method for the fabrication of PEDOT-PSS film modified interdigitated electrode by integrating inkjet printing with electroless plating technique is reported. Palladium nanoparticles stabilized in water by styrene-N-isopropylacrylamide oligomer (St-co-NIPAAm) are inkjet printed onto a flexible PET surface to create the catalytic sites, onto which nickel is subsequently deposited by an electroless plating method to obtain the desired interdigitated electrode pattern. As a first step the influence of the electroless plating conditions (plating temperature, plating time and stabilizer concentration) to prepare the interdigitated electrode are investigated. Then, a galvanic displacement reaction is utilized to deposit a monolayer of gold coating on the nickel film surface to increase the electrical conductivity. Finally a layer of PEDOT-PSS thin film is inkjet-printed on top of the gold interdigitated electrode and used as the sensor to detect CO₂. The device is exposed to CO₂ gas at concentration of 100 ppm at room temperature (300 K) and the obtained results are presented. Based on our proposed mechanism for the CO₂ sensing, the PEDOT-PSS modified interdigitated electrode has good potential as a novel sensor for polar gases and vapors.