Self-Assembly of Two-Dimensional Nanosheets into One-Dimensional Nanostructures

Ultrathin 2D nanosheets, such as graphene and transition-metal dichalcogenides (TMDs), have attracted considerable attention in the last decade. The large lateral size, ultrathin thickness, and high flexibility of these ultrathin 2D nanosheets render them appealing building blocks for constructing new nanostructures via self-assembly, e.g., 3D networks, 1D nanoscrolls, nanotubes, and nanofibers, and 0D nanoparticles. This review summarizes the recent progress on the assembly of ultrathin 2D nanosheets into novel nanostructures with a particular focus on 1D nanostructures. We begin by introducing various methods for the assembly of 2D nanosheets into 1D nanostructures and then discuss their potential applications in energy storage, electronic devices, and sensors. We conclude with the current research progress and some personal perspectives on the challenges and future research directions in this promising area.