纳米结构聚苯胺传感器

Nanostructured polyaniline sensors.

作者信息

Huang Jiaxing, Virji Shabnam, Weiller Bruce H, Kaner Richard B

机构信息

Department of Chemistry & Biochemistry and California NanoSystems Institute, University of California, Los Angeles, Los Angeles, CA 90095-1569, USA.

出版信息

Chemistry. 2004 Mar 19;10(6):1314-9. doi: 10.1002/chem.200305211.

DOI:10.1002/chem.200305211

PMID:15034876

Abstract

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.

摘要

共轭聚合物聚苯胺是一种很有前景的传感器材料，因为其导电性对化学蒸汽高度敏感。人们发现聚苯胺纳米纤维由于其更大的暴露表面积，相对于传统材料具有卓越的性能。本文描述了一种无模板化学合成方法，该方法可制备出直径低于100纳米的均匀聚苯胺纳米纤维。界面聚合反应易于放大规模以制备克级量的产物。由未掺杂或掺杂的聚苯胺纳米纤维制成的电阻式传感器，在分别暴露于酸或碱蒸汽时，性能优于传统聚苯胺。纳米纤维的灵敏度基本上与厚度无关。