Oxygen-bearing functionalities enhancing NO 2 , NH 3 , and acetone electronic response and response variation by polythiophenes in organic field-effect transistor sensors
Oxygen-bearing functionalities enhancing NO 2 , NH 3 , and acetone electronic response and response variation by polythiophenes in organic field-effect transistor sensors
复制标题
含氧官能团增强有机场效应晶体管传感器中聚噻吩的 NO 2 、NH 3 和丙酮电子响应和响应变化
DOI：
10.1039/d1tc04650k
复制
发表时间：
2022
影响因子：
6.4
通讯作者：
Katz, Howard E.
中科院分区：
文献类型：
--
作者：
Wagner, Justine;Song, Yunjia;Shapiro, Jenna;Katz, Howard E.
我们研究了一系列噻吩（共）聚合物与含氧侧链（CH 2 OH，线性聚乙二醇，冠醚），包括新的聚（3-羟甲基噻吩）（PTOH）和其他新合成的聚合物的增强的蒸汽响应和改变的响应比。含羟甲基的共聚物具有更高的流动性相比，聚（3-己基噻吩）（P3 HT）。较大的冠醚部分促进P3 HT的晶体管特性，而较小的冠醚部分损害它们。取代不同的含氧官能团增加噻吩聚合物对NO2，NH3和丙酮的响应。例如，聚醚侧链增加了P3 HT和PTOH的共聚物的NO2响应灵敏度，但对气体分析物的灵敏度对于基于二醇的官能团而不是冠醚更突出。PTOH对NO2非常敏感，并且响应可能包括来自OH基团上的导电质子的贡献。每个官能团赋予的秩序气体灵敏度之间缺乏相关性被发现是有用的，用于设计一个选择性的传感器阵列。我们特别表现出高的分类精度为所有的聚合物响应NO2和丙酮蒸气，这两个都增加了设备的电流，但响应率不同，足以让高度分类判别函数的推导。
We investigated the enhanced vapor responses and altered response ratios of a series of thiophene (co)polymers with oxygenated side chains (CH2OH, linear polyethylene glycol, and crown ether), including the novel poly(3-hydroxymethylthiophene) (PTOH) and other newly synthesized polymers. Hydroxymethyl-containing copolymers had higher mobility compared to poly(3-hexylthiophene) (P3HT). The larger crown ether moiety promotes transistor characteristics of P3HT while the smaller one impairs them. Incorporating different oxygen bearing functionalities increased responses of thiophene polymers to NO2, NH3, and acetone. For example a polyether side chain increases the NO2 response sensitivity of copolymers of both P3HT and PTOH, but sensitivity towards gas analytes was more prominent for glycol-based functionalities rather than the crown ethers. PTOH is very sensitive to NO2 and the response likely includes a contribution from conductive protons on the OH group. The lack of correlation among the rank-ordered gas sensitivities imparted by each functional group was found to be useful for designing a selective sensor array. We specifically showed high classification accuracy for all the polymer responses to NO2 and acetone vapors, both of which gave increased device currents but with response ratios different enough to allow highly classifying discriminant functions to be derived.