Metal Films on Two-Dimensional Materials: van der Waals Contacts and Raman Enhancement.

ABSTRACT: Electronic devices based on two-dimensional (2D) materials will need ultraclean and defect-free van der Waals (vdW) contacts with three-dimensional (3D) metals. It is therefore important to understand how vdW metal films deposit on 2D surfaces. Here, we study the growth and nucleation of vdW metal films of indium (In) and non-vdW metal films of gold (Au), deposited on 2D MoS₂ and graphene. In follows a 2D growth mode in contrast to Au that follows a 3D growth mode. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) were used to image the morphology of metal clusters during growth and quantify the nucleation density. As compared to Au, In atoms exhibit nearly 50 times higher diffusivity (3.65 × 10^-6 μm^-2 s^-1) and half the nucleat

SUBMITTER: Ghani MA 

PROVIDER: S-EPMC10875649 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature