Controlling Gold-Assisted Exfoliation of Large-Area MoS₂ Monolayers with External Pressure.

ABSTRACT: Gold-assisted exfoliation can fabricate centimeter- or larger-sized monolayers of van der Waals (vdW) semiconductors, which is desirable for their applications in electronic and optoelectronic devices. However, there is still a lack of control over the exfoliation processes and a limited understanding of the atomic-scale mechanisms. Here, we tune the MoS₂-Au interface using controlled external pressure and reveal two atomic-scale prerequisites for successfully producing large-area monolayers of MoS₂. The first is the formation of strong MoS₂-Au interactions to anchor the top MoS₂ monolayer to the Au surface. The second is the integrity of the covalent network of the monolayer, as the majority of the monolayer is non-anchored and relies on the cov

SUBMITTER: Chen S 

PROVIDER: S-EPMC11397389 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature