Nanostructured polyaniline sensors
Nanostructured polyaniline sensors
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DOI：
10.1002/chem.200305211
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发表时间：
2004-03-19
影响因子：
4.3
通讯作者：
Kaner, RB
中科院分区：
文献类型：
--
作者：
Huang, J;Virji, S;Kaner, RB
共轭聚合物聚苯胺是一种很有前途的传感器材料，因为它的导电性是高度敏感的化学蒸气。聚苯胺的纳米纤维被发现具有相对于常规材料的上级性能，这是由于其大得多的暴露表面积。描述了一种无模板的化学合成方法，其产生直径小于100 nm的均匀聚苯胺纳米纤维。界面聚合可以容易地按比例放大到克数量。由未掺杂或掺杂的聚苯胺纳米纤维制成的电阻型传感器在分别暴露于酸或碱蒸气时优于常规聚苯胺。纳米纤维基本上不显示其灵敏度的厚度依赖性。
The conjugated polymer polyaniline is a promising material for sensors, since its conductivity is highly sensitive to chemical vapors. Nanofibers of polyaniline are found to have superior performance relative to conventional materials due to their much greater exposed surface area. A template-free chemical synthesis is described that produces uniform polyaniline nanofibers with diameters below 100 nm. The interfacial polymerization can be readily scaled to make gram quantities. Resistive-type sensors made from undoped or doped polyaniline nanofibers outperform conventional polyaniline on exposure to acid or base vapors, respectively The nanofibers show essentially no thickness dependence to their sensitivity.