Nano-thick metallic transition metal dichalcogenides such as VS2 are essential building blocks for constructing next-generation electronic and energy-storage applications, as well as for exploring unique physical issues associated with the dimensionality effect. However, such 2D layered materials have yet to be achieved through either mechanical exfoliation or bottom-up synthesis. Herein, we report a facile chemical vapor deposition route for direct production of crystalline VS2 nanosheets with sub-10 nm thicknesses and domain sizes of tens of micrometers. The obtained nanosheets feature spontaneous superlattice periodicities and excellent electrical conductivities (~3×103 S cm−1), which has enabled a variety of applications such as contact electrodes for monolayer MoS2 with contact resistances of ~1/4 to that of Ni/Au metals, and as supercapacitor electrodes in aqueous electrolytes showing specific capacitances as high as 8.6×102 F g−1. This work provides fresh insights into the delicate structure-property relationship and the broad application prospects of such metallic 2D materials.
@article{arxiv.1703.09582,
title = {Metallic vanadium disulfide nanosheets as a platform material for multifunctional electrode applications},
author = {Qingqing Ji and Cong Li and Jingli Wang and Jingjing Niu and Yue Gong and Zhepeng Zhang and Qiyi Fang and Yu Zhang and Jianping Shi and Lei Liao and Xiaosong Wu and Lin Gu and Zhongfan Liu and Yanfeng Zhang},
journal= {arXiv preprint arXiv:1703.09582},
year = {2017}
}