Polymeric films based on long-chain acetylenes as sensors for iodine vapour

被引：13
作者：
Dultsev, F. N. [1 ]
机构：
[1] Inst Semicond Phys SB RAS, Novosibirsk, Russia
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2008年 / 129卷 / 01期
基金：
俄罗斯基础研究基金会;
关键词：
conducting polymeric thin films; Langnmir-Blodgett procedure; iodine vapour;
D O I：
10.1016/j.snb.2007.07.088
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Conducting polymeric thin films can be used as sensors to detect and identify volatile organics. Practically valuable possibilities of obtaining thin conducting layers with a definite topology in the substrate plane are ensured by Langmuir-Blodgett procedure. Orientation of monomer molecules is provided by the procedure of transferring the molecules from the subphase onto the substrate. It is shown that the UV-mediated polymerization of multimolecular layers of the acetylenic alcohol tetracosin-2-ol-1 (C21H43C CCH2OH) results in the trans-configuration with respect to the double bonds formed in polymerization. The conductivity of thus obtained layers is shown to depend on the partial pressure of molecular iodine in the gas phase. A mechanism is proposed that explains a non-linear increase in conductivity accompanying adsorption of iodine vapour. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：171 / 175
页数：5
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