Doped and dedoped polyaniline nanofiber based conductometric hydrogen gas sensors
Doped and dedoped polyaniline nanofiber based conductometric hydrogen gas sensors
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DOI：
10.1016/j.sna.2006.11.033
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发表时间：
2007-09-12
影响因子：
4.6
通讯作者：
Kaner, R. B.
中科院分区：
文献类型：
--
作者：
Sadek, A. Z.;Wlodarski, W.;Kaner, R. B.
采用无模板快速聚合法，以盐酸为掺杂剂，通过苯胺的化学氧化聚合合成了聚苯胺纳米纤维。将掺杂和去掺杂的纳米纤维沉积到用于气体传感应用的电导蓝宝石换能器上。传感器在室温下暴露于各种浓度的氢气（H-2）。暴露于1%H-2时，掺杂聚苯胺纳米纤维传感器的灵敏度为1.11，去掺杂聚苯胺纳米纤维传感器的灵敏度为1.07。快速响应时间分别为28和32秒，观察去掺杂和掺杂传感器。在基线稳定性和可重复性方面，去掺杂的双折射传感器优于掺杂的传感器。由于其室温操作，气体传感器是有前途的环境应用。(c)2006 Elsevier B. V.保留所有权利。
Template-free, rapid polymerisation was employed to synthesize polyaniline nanofibers using chemical oxidative polymerisation of aniline, with HCl as a dopant. The doped and dedoped nanofibers were deposited onto conductometric sapphire transducers for gas sensing applications. The sensors were exposed to various concentrations of hydrogen (H-2) gas at room temperature. The sensitivity was measured to be 1.11 for doped and 1.07 for dedoped polyaniline nanofiber sensors upon exposure to 1% H-2. Fast response times of 28 and 32 s were observed for dedoped and doped sensors, respectively. The dedoped nanofiber sensor outperforms the doped sensor in terms of baseline stability and repeatability. Due to its room temperature operation, the gas sensor is promising for environmental applications. (c) 2006 Elsevier B.V. All rights reserved.