Year: 2025
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide Gold-assisted exfoliation has emerged as an effective method for producing large-area monolayers of two-dimensional materials, yet its underlying mechanism remains poorly understood. While other metals also hold promise for facilitating large-area exfoliation, their practical application is hindered by oxidation in air. To address this, we fabricate heterostructures of monolayer MoS 2 with polycrystalline gold, silver, copper, palladium, cobalt, and nickel via direct mechanical exfoliation of bulk molybdenite under controlled atmospheric conditions. Our photoemission spectroscopy, vibrational spectroscopy, and density functional theory results reveal the metal-dependent modification of monolayer MoS 2 . We identify the hybridization directionality and, in particular, the asymmetry between the bottom and top sulfur atoms as previously overlooked key factors in weakening the MoS 2 –MoS 2 van der Waals interaction, ultimately enabling selective monolayer exfoliation.
Source: Nano Letters
Institutions: Czech Academy of Sciences, Czech Academy of Sciences, Heyrovsky Institute, University of Chemistry and Technology, Prague, FZU - Institute of Physics of the Czech Academy of Sciences, University of Manchester, Daresbury Laboratory, Eötvös Loránd University, Technische Universität Dresden, Helmholtz-Zentrum Dresden-Rossendorf
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
OpenAlex ID: W4413306412