Low-Temperature Cross-Linking of PEDOT:PSS Films Using Divinylsulfone
Low-Temperature Cross-Linking of PEDOT:PSS Films Using Divinylsulfone
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DOI：
10.1021/acsami.7b02296
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发表时间：
2017-05-31
影响因子：
9.5
通讯作者：
Mecerreyes, David
中科院分区：
文献类型：
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作者：
Mantione, Daniele;del Agua, Isabel;Mecerreyes, David
近年来，生物电子学的发展促使人们对导电聚合物薄膜在生物环境界面处的特性进行了研究。聚（3，4-亚乙基二氧噻吩）掺杂聚（苯乙烯磺酸盐）（PEDOT：PSS）从市售来源已被用作这些研究的模型系统。已经使用不同的交联方案来稳定该材料的膜以防止分层和再分散，但是成本是电导率的降低和/或额外的热处理。本文介绍了一种新型的PEDOT：PSS交联剂二乙烯砜（DVS）。由于DVS的乙烯基基团的较高反应性，交联可以在室温下进行。此外，DVS不会降低PEDOT：PSS的电子电导率，而是通过充当二次掺杂剂来增加它。细胞培养研究表明，PEDOT：PSS：DVS膜是细胞相容的，并支持神经再生。作为一个例子，我们表明，这种材料提高了有机电化学晶体管（OECT）器件的介电值和稳定性。这些结果为DVS作为PEDOT：PSS的有效交联剂在生物电子学应用中的利用开辟了道路。
Recent interest in bioelectronics has prompted the exploration of properties of conducting polymer films at the interface with biological milieus. Poly(3,4-ethylenedioxythiophene) doped with poly(styrenesulfonate) (PEDOT:PSS) from a commercially available source has been used as a model system for these studies. Different cross-linking schemes have been used to stabilize films of this material against delamination and redispersion, but the cost is a decrease in the electrical conductivity and/or additional heat treatment. Here we introduce divinylsulfone (DVS) as a new cross-linker for PEDOT:PSS. Thanks to the higher reactiveness of the vinyl groups of DVS, the cross-linking can be performed at room temperature. In addition, DVS does not reduce electronic conductivity of PEDOT:PSS but rather increases it by acting as a secondary dopant. Cell culture studies show that PEDOT:PSS:DVS films are cytocompatible and support neuroregeneration. As an example, we showed that this material improved the transconductance value and stability of an organic electrochemical transistor (OECT) device. These results open the way for the utilization of DVS as an effective cross-linker for PEDOT:PSS in bioelectronics applications.