Hybridized 1T/2H-MoS2/graphene fishnet tube for high-performance on-chip integrated micro-systems co

• 作 者: Chi Zhang Jing Ning Boyu Wang Haibin Guo Xin Feng Xue Shen Yanqing Jia Jianguo Dong Dong Wang Jincheng Zhang Yue Hao
• 机 构: The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology,Xidian University,Xi’a
• 出 处: 纳米研究（英文版）
• 发表日期: 2021年1期
• 关键词: multifunctional system integrate 1T/2H-MoS2 supercapacitor gas sensor

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 1 T/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 o.1 F·cmn-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℃).The multifunctional system demonstrates the possibility of achieving a two-dimensional integrated system for wearable devices and wireless sensor networks in the future.