Carboxylic Acid‐Functionalized Conjugated Polymer Promoting Diminished Electronic Drift and Amplified Proton Sensitivity of Remote Gates Compared to Nonpolar Surfaces in Aqueous Media
Carboxylic Acid‐Functionalized Conjugated Polymer Promoting Diminished Electronic Drift and Amplified Proton Sensitivity of Remote Gates Compared to Nonpolar Surfaces in Aqueous Media
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与水介质中的非极性表面相比，羧酸-功能化共轭聚合物可减少电子漂移并增强远程门的质子灵敏度
DOI：
10.1002/aelm.201901073
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发表时间：
2020
影响因子：
6.2
通讯作者：
Katz, Howard E.
中科院分区：
文献类型：
--
作者：
Jang, Hyun‐June;Wagner, Justine;Song, Yunjia;Lee, Taein;Katz, Howard E.
通过研究远栅(RG)FET结构中电极表面-溶液组合对场效应管(FET)溶解分析物传感器的电漂移的影响，采用系统分析的方法来理解场效应管(FET)中发生的电漂移。在pH值为7的水和纯净的乙腈中，具有不同的偶极和极化率，应用于氧化铟、二氧化硅、六甲基二硅氮烷修饰的二氧化硅、聚苯乙烯、聚(苯乙烯-共丙烯酸)、聚(3-己基噻吩基-2，5-二基)(P3HT)和聚[3-(3-羧丙基)噻吩基-2，5-二基](PT-COOH)的RG表面。研究发现，在某些情况下，栅极电场引起的界面偶极子缓慢重定向会引起界面电势的严重漂移和滞后。导电和带电的P3HT和PT-COOH通过促进快速的表面平衡来提高电化学稳定性。P3HT的pH敏感性(每pH 17 mV)也是质子掺杂的一个标志。PT-COOH表现出进一步增强的pH敏感性(每pH 30 mV)。这种电化学稳定性和pH响应相结合的PT-COOH被认为是基于聚合物的生物传感器的有利条件。
A systematic analysis is used to understand electrical drift occurring in field‐effect transistor (FET) dissolved‐analyte sensors by investigating its dependence on electrode surface‐solution combinations in a remote‐gate (RG) FET configuration. Water at pH 7 and neat acetonitrile, having different dipoles and polarizabilities, are applied to the RG surface of indium tin oxide, SiO2, hexamethyldisilazane‐modified SiO2, polystyrene, poly(styrene‐co‐acrylic acid), poly(3‐hexylthiophene‐2,5‐diyl) (P3HT), and poly [3‐(3‐carboxypropyl)thiophene‐2,5‐diyl] (PT‐COOH). It is discovered that in some cases a slow reorientation of dipoles at the interface induced by gate electric fields causes severe drift and hysteresis because of induced interface potential changes. Conductive and charged P3HT and PT‐COOH increase electrochemical stability by promoting fast surface equilibrations. It is also demonstrated that pH sensitivity of P3HT (17 mV per pH) is an indication of proton doping. PT‐COOH shows further enhanced pH sensitivity (30 mV per pH). This combination of electrochemical stability and pH response in PT‐COOH are proposed as advantageous for polymer‐based biosensors.
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影响因子：
19
作者：
Guardado, Jesus O.;Salleo, Alberto
通讯作者：
Salleo, Alberto
退化对EOS结构表面态和电学特性的影响
DOI：
--
发表时间：
1991
期刊：
影响因子：
--
作者：
E. Cabruja;Á. Merlos;C. Cané;M. Lozano;J. Bausells;J. Esteve
通讯作者：
J. Esteve
影响因子：
8.6
作者：
Despa, F;Fernández, A;Berry, RS
通讯作者：
Berry, RS
影响因子：
8.6
作者：
Savva, Achilleas;Cendra, Camila;Inal, Sahika
通讯作者：
Inal, Sahika