Study of ionic liquid immobilization on polyvinyl ferrocene substrates for gas sensor arrays.
Study of ionic liquid immobilization on polyvinyl ferrocene substrates for gas sensor arrays.
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DOI：
10.1021/la104191n
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发表时间：
2011-03
期刊：
影响因子：
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通讯作者：
Kuang-Yu Hou;A. Rehman;Xiangqun Zeng
中科院分区：
文献类型：
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作者：
Kuang-Yu Hou;A. Rehman;Xiangqun Zeng
在本报告中，系统表征了导电聚合物氧化态和结构对离子液体（IL）/导电聚合物（CP）复合膜的设计和开发的影响。通过改变调节势（0.7 vs 0.0 V）和电解质的四个不同的聚二循环（PVF）膜，以测试其气体感应特性（例如，敏感性，选择性，响应时间，线性，线性性和动态范围，对各种气体分析物例如二氯甲烷，乙醇，天然气，甲烷，甲醛（37％）和苯）利用石英晶体微生体（QCM）和ATR-FT-IR。进一步研究了最好的膜作为固定的各种IL的基材，从而提高了灵敏度和选择性。最后，开发了两个带有以下方案的四个传感器的阵列，并通过使用线性判别分析来对四个目标分析物进行分类的能力进行了特征：（1）最高灵敏度PVF PVF膜与四个不同的IL和（2）固定在（2）最高灵敏度IL固定在四种不同的PVF膜中。事实证明，数组2在区分分析物方面比数组1好得多，这对于确定一个事实非常重要，即一组多样化的PVF氧化还原状态允许合理地开发基于PVF/IL复合的传感器阵列，以便分析利用结构差异和分子间相互作用程度的复杂混合物。
In this report, the effects of conductive polymer oxidation states and structures on the design and development of ionic liquid (IL)/conductive polymer (CP) composite films for gas sensing are systematically characterized. Four different polyvinyl ferrocene (PVF) films synthesized by varying the conditioning potential (0.7 vs 0.0 V) and the electrolyte are tested for their gas-sensing properties (e.g., sensitivity, selectivity, response time, linearity, and dynamic range against various gas analytes such as dichloromethane, ethanol, natural gas, methane, formaldehyde (37%), and benzene) utilizing the quartz crystal microbalance (QCM) and ATR-FT-IR. The best available film is further studied as a substrate for the immobilization of various ILs that enhanced both the sensitivity and selectivity. Finally, two arrays, each comprising four sensors with the following scheme are developed and characterized for their ability to classify the four target analytes by using linear discriminant analysis: (1) the highest sensitivity PVF film immobilized with four different ILs and (2) the highest sensitivity IL immobilized in four different PVF films. Array 2 is proven to be much better than array 1 in discriminating the analytes, which is very significant in establishing the fact that a diverse set of PVF redox states allow the rational development of a PVF/IL composite-based sensor array in order to analyze complex mixtures utilizing structural differences and the extent of intermolecular interactions.