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.
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Acknowledgements
The work was supported by the Natural Science Basic Research Plan in Shaanxi Province of China (Nos. 2017ZDCXL-GY-11-03 and 2019ZDLGY16-08); Youth Science and Technology Nova Program of Shaanxi Province; the Wuhu and Xidian University special fund for industry-university-research cooperation (No. HX01201909039).
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Hybridized 1T/2H-MoS2/graphene fishnet tube for high-performance on-chip integrated micro-systems comprising supercapacitors and gas sensors
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Zhang, C., Ning, J., Wang, B. et al. Hybridized 1T/2H-MoS2/graphene fishnet tube for high-performance on-chip integrated micro-systems comprising supercapacitors and gas sensors. Nano Res. 14, 114–121 (2021). https://doi.org/10.1007/s12274-020-3052-x
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DOI: https://doi.org/10.1007/s12274-020-3052-x