Hybridized 1T/2H-MoS2/graphene fishnet tube for high-performance on-chip integrated micro-systems comprising supercapacitors and gas sensors
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 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.
Tsinghua University Press
Chi Zhang, Jing Ning, Boyu Wang, Haibin Guo, Xin Feng, Xue Shen, Yanqing Jia, Jianguo Dong, Dong Wang, Jincheng Zhang, Yue Hao. Hybridized 1T/2H-MoS2/graphene fishnet tube for high-performance on-chip integrated micro-systems comprising supercapacitors and gas sensors. Nano Research 2021, 14(1): 114-121.