title: Synthesis of MoS2 and MoSe2 films with vertically aligned layers.
abstract: Layered materials consist of molecular layers stacked together by weak interlayer interactions. They often crystallize to form atomically smooth thin films, nanotubes, and platelet or fullerene-like nanoparticles due to the anisotropic bonding. Structures that predominately expose edges of the layers exhibit high surface energy and are often considered unstable. In this communication, we present a synthesis process to grow MoS2 and MoSe2 thin films with vertically aligned layers, thereby maximally exposing the edges on the film surface. Such edge-terminated films are metastable structures of MoS2 and MoSe2, which may find applications in diverse catalytic reactions. We have confirmed their catalytic activity in a hydrogen evolution reaction (HER), in which the exchange current density correlates directly with the density of the exposed edge sites.
authors: Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States.
authors: Desheng
authors: D
authors: Kong
authors: Haotian
authors: H
authors: Wang
authors: Judy J
authors: JJ
authors: Cha
authors: Mauro
authors: M
authors: Pasta
authors: Kristie J
authors: KJ
authors: Koski
authors: Jie
authors: J
authors: Yao
authors: Yi
authors: Y
authors: Cui