Aqueous Gating of van der Waals Materials on Bilayer Nanopaper

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• 作者：Wenzhong Bao ; Zhiqiang Fang ; Jiayu Wan ; Jiaqi Dai ; Hongli Zhu ; Xiaogang Han ; Xiaofeng Yang ; Colin Preston ; Liangbing Hu
• 刊名：ACS Nano
• 出版年：2014
• 出版时间：October 28, 2014
• 年：2014
• 卷：8
• 期：10
• 页码：10606-10612
• 全文大小：471K
• ISSN：1936-086X

文摘

In this work, we report transistors made of van der Waals materials on a mesoporous paper with a smooth nanoscale surface. The aqueous transistor has a novel planar structure with source, drain, and gate electrodes on the same surface of the paper, while the mesoporous paper is used as an electrolyte reservoir. These transistors are enabled by an all-cellulose paper with nanofibrillated cellulose (NFC) on the top surface that leads to an excellent surface smoothness, while the rest of the microsized cellulose fibers can absorb electrolyte effectively. Based on two-dimensional van der Waals materials, including MoS₂ and graphene, we demonstrate high-performance transistors with a large on鈥搊ff ratio and low subthreshold swing. Such planar transistors with absorbed electrolyte gating can be used as sensors integrated with other components to form paper microfluidic systems. This study is significant for future paper-based electronics and biosensors.

Keywords:

liquid-gated transistor; mesoporous paper; paper sensors; MoS₂; graphene; microfluidics