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Nano Research

Article Title

Hybridized 1T/2H-MoS2/graphene fishnet tube for high-performance on-chip integrated micro-systems comprising supercapacitors and gas sensors

Authors

Chi Zhang, The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xi’an 710071, China;Shaanxi Joint Key Laboratory of Graphene, Xidian University, Xi’an 710071, China
Jing Ning, The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xi’an 710071, China;Shaanxi Joint Key Laboratory of Graphene, Xidian University, Xi’an 710071, China
Boyu Wang, The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xi’an 710071, China;Shaanxi Joint Key Laboratory of Graphene, Xidian University, Xi’an 710071, China
Haibin Guo, The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xi’an 710071, China;Shaanxi Joint Key Laboratory of Graphene, Xidian University, Xi’an 710071, China
Xin Feng, The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xi’an 710071, China;Shaanxi Joint Key Laboratory of Graphene, Xidian University, Xi’an 710071, China
Xue Shen, The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xi’an 710071, China;Shaanxi Joint Key Laboratory of Graphene, Xidian University, Xi’an 710071, China
Yanqing Jia, The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xi’an 710071, China;Shaanxi Joint Key Laboratory of Graphene, Xidian University, Xi’an 710071, China
Jianguo Dong, The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xi’an 710071, China;Shaanxi Joint Key Laboratory of Graphene, Xidian University, Xi’an 710071, China
Dong Wang, The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xi’an 710071, China;Shaanxi Joint Key Laboratory of Graphene, Xidian University, Xi’an 710071, China
Jincheng Zhang, The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xi’an 710071, China;Shaanxi Joint Key Laboratory of Graphene, Xidian University, Xi’an 710071, China
Yue Hao, The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xi’an 710071, China;Shaanxi Joint Key Laboratory of Graphene, Xidian University, Xi’an 710071, China

Keywords

multifunctional system, integrate, 1T/2H-MoS2, supercapacitor, gas sensor

Abstract

The emerging micro-nano-processing technologies have propelled significant advances in multifunctional systems that can perform multiple functions within a small volume through integration. Herein, we present an on-chip multifunctional system based on a 1T/2H-MoS2/graphene fishnet tube, where a micro-supercapacitor and a gas sensor are integrated. A hybrid three-dimensional stereo nanostructure, including MoS2 nanosheets and graphene fishnet tubes, provides K+ ions with a short diffusion pathway and more active sites. Owing to the large layer spacing of 1T-MoS2 promoting fast reversible diffusion, the on-chip micro-supercapacitor exhibits excellent electrochemical properties, including an areal capacitance of 0.1 F·cm-2 (1 mV·s-1). The variation in the conductivity of 2H-MoS2 when ammonia molecules are adsorbed as derived from the first-principles calculations proves the Fermi level-changes theory. Driven by a micro-supercapacitor, the responsivity of the gas sensor can reach 55.7% at room temperature (27 °C). The multifunctional system demonstrates the possibility of achieving a two-dimensional integrated system for wearable devices and wireless sensor networks in the future.

Publisher

Tsinghua University Press

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