摘要

<正>Two-dimensional (2D) materials, such as graphene, h-BN, and Mo S2, and their van der Waals (vdW) heterostructures attracted tremendous research interests in the past decade for their intriguing properties at atomic thinness. 2D materials not only offered a great platform for the fundamental research, but also brought promising application potentials in novel van der Waals electronic and optoelectronic [1–5].