Ma Xingfa, Li Guang, Wang Mang, Cheng Yunan, Bai Ru, Chen Hongzheng
Department of Polymer Science & Engineering, State key lab of silicon materials, Zhejiang University, Hangzhou 310027, P.R. China.
Chemistry. 2006 Apr 12;12(12):3254-60. doi: 10.1002/chem.200500763.
To obtain organic nanowire sensors with high sensitivity and rapid response times, based on the inducement effect of surfactants during in situ polymerization, nanostructured polyaniline composites are obtained by using a chemical oxidation method by adding a small amount of surfactant. A casting method is employed on interdigitated carbon electrodes. The gas sensitivity to a series of chemical vapors is examined at room temperature. The results indicate that polyaniline with regular nanowire structure is obtained when succinic acid is added. The gas sensitivity and response rates of a film with nanowire structure are much better than those of conventional polyaniline films produced by means of organic solution spin coating methods. The film described in this work shows good selectivity to trimethylamine and other related gases and, the reaction being reversible with the use of high-purity nitrogen.
为了获得具有高灵敏度和快速响应时间的有机纳米线传感器，基于表面活性剂在原位聚合过程中的诱导作用，通过添加少量表面活性剂采用化学氧化法制备了纳米结构的聚苯胺复合材料。在叉指式碳电极上采用流延法。在室温下检测对一系列化学蒸汽的气敏性。结果表明，添加琥珀酸时可获得具有规则纳米线结构的聚苯胺。具有纳米线结构的薄膜的气敏性和响应速率远优于通过有机溶液旋涂法制备的传统聚苯胺薄膜。本文所述薄膜对三甲胺和其他相关气体表现出良好的选择性，并且在使用高纯度氮气时反应是可逆的。
