Significant enhancement of PEDOT thin film adhesion to inorganic solid substrates with EDOT-acid.
Significant enhancement of PEDOT thin film adhesion to inorganic solid substrates with EDOT-acid.
复制标题
使用 EDOT 酸显着增强 PEDOT 薄膜对无机固体基材的附着力。
DOI：
10.1021/acsami.5b03350
复制
发表时间：
2015
影响因子：
9.5
通讯作者：
Martin,DavidC
中科院分区：
文献类型：
--
作者：
Wei,Bin;Liu,Jinglin;Ouyang,Liangqi;Kuo,Chin-Chen;Martin,DavidC
聚（3，4-乙撑二氧噻吩）（PEDOT）具有高导电性、可调的表面形貌、相对柔软的机械响应、高化学稳定性和优异的生物相容性，已成为各种电子生物医学器件的有前途的涂层材料。然而，PEDOT对无机金属和半导体基底的相对差的粘附性仍然对长期应用构成挑战。在这里，我们报告说，2，3-二氢噻吩并（3，4-B）（1，4）二氧杂环己烯-2-羧酸（EDOT-酸）显着改善PEDOT薄膜和无机固体电极之间的粘附性。EDOT-酸分子通过羧基的化学吸附化学键合到活化的氧化物基底上。然后将PEDOT聚合到EDOT-酸改性的基底上，形成共价键合的涂层。通过循环伏安法、接触角测量、原子力显微镜和X射线光电子能谱等方法研究了EDOT-酸在电极表面的吸附行为。用电化学阻抗谱和循环伏安法研究了PEDOT薄膜的电学性能。一个积极的超声波处理测试证实了显着改善的附着力和机械稳定性的电极上的PEDOT膜与EDOT-酸处理的那些没有处理。
With its high conductivity, tunable surface morphology, relatively soft mechanical response, high chemical stability, and excellent biocompatibility, poly(3,4-ethylenedioxythiophene) (PEDOT) has become a promising coating material for a variety of electronic biomedical devices. However, the relatively poor adhesion of PEDOT to inorganic metallic and semiconducting substrates still poses challenges for long-term applications. Here, we report that 2,3-dihydrothieno(3,4-b)(1,4)dioxine-2-carboxylic acid (EDOT-acid) significantly improves the adhesion between PEDOT thin films and inorganic solid electrodes. EDOT-acid molecules were chemically bonded onto activated oxide substrates via the chemisorption of the carboxylic groups. PEDOT was then polymerized onto the EDOT-acid modified substrates, forming covalently bonded coatings. The adsorption of EDOT-acid onto the electrode surfaces was characterized by cyclic voltammetry (CV), contact angle measurements, atomic force microscopy, and X-ray photoelectron spectroscopy. The electrical properties of the subsequently coated PEDOT films were studied by electrochemical impedance spectroscopy and CV. An aggressive ultrasonication test confirmed the significantly improved adhesion and mechanical stability of the PEDOT films on electrodes with EDOT-acid treatment over those without treatment.