Transparent, Flexible, All-Reduced Graphene Oxide Thin Film Transistors

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• 作者：Qiyuan He ; Shixin Wu ; Shuang Gao ; Xiehong Cao ; Zongyou Yin ; Hai Li ; Peng Chen ; Hua Zhang
• 刊名：ACS Nano
• 出版年：2011
• 出版时间：June 28, 2011
• 年：2011
• 卷：5
• 期：6
• 页码：5038-5044
• 全文大小：928K
• 年卷期：0
• ISSN：1936-086X

文摘

Owing to their unique thickness-dependent electronic properties, together with perfect flexibility and transparency, graphene and its relatives make fantastic material for use in both active channel and electrodes in various electronic devices. On the other hand, the electronic sensors based on graphene show high potential in detection of both chemical and biological species with high sensitivity. In this contribution, we report the fabrication of all-reduced graphene oxide (rGO) thin film transistors by a combination of solution-processed rGO electrodes with a micropatterned rGO channel, and then study their applications in biosensing. Our all-rGO devices are cost-effective, highly reproducible, and reliable. The fabricated electronic sensor is perfectly flexible with high transparency, showing good sensitivity in detecting proteins in the physiological buffer. As a proof of concept, fibronectin as low as 0.5 nM was successfully detected, which is comparable with the previously reported protein sensors based on single-layer pristine graphene obtained from mechanical cleavage. The specific detection of avidin by using biotinylated all-rGO sensor is also successfully demonstrated.