A5029220485- 2D Materials and Applications
- MXene and MAX Phase Materials
- Graphene research and applications
- Topological Materials and Phenomena
- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Machine Learning in Materials Science
University of Hong Kong
2023
Abstract Ultrathin two‐dimensional transition‐metal dichalcogenides (TMDs) have been pursued extensively in recent years for interesting physics and application potentials. For the latter, it is essential to synthesize crystalline TMD monolayers at wafer‐scale. Here, we report growth of single‐crystalline MSe 2 (M = Mo, W) wafer‐scale by molecular‐beam epitaxy low temperatures (200–400°C) on nominally flat Au(1 1 1) substrates. The epifilms intrinsic defect densities 10 12 cm −2 . grown...
Abstract Two-dimensional (2D) nanomaterials hold immense application potentials such as in high
performance nano-electronics, and asymmetric 2D structures with inherent electric dipoles will 
extends the promises. Yet synthesizing remains 
challenging. Herein, we report first synthesis of single-layer (SL) hexagonal (H-) phase polar 
Janus MoSeN via nitrogen-plasma-assisted molecular beam epitaxy (MBE). This is a significant 
achievement given...
Monolayer (ML) transition-metal dichalcogenides (TMDs) have attracted a lot of research interest in recent years due to their many interesting properties as well application promises. Depending on the specific combinations metals (e.g., Mo and W) with chalcogen elements S, Se, Te), binary TMDs exhibit wide spectrum physical characteristics, e.g., from metal semiconductor and/or superconductor. Extension ternary compounds alloys may offer even wider variations are thus both fundamental...
Abstract Band bending near mirror twin domain boundaries (MTBs) in a MoSe 2 monolayer grown on different substrates, i.e., highly oriented pyrolytic graphite (HOPG), graphene‐on‐SiC, and crystalline Au(110), is investigated by low temperature scanning tunneling microscopy/spectroscopy. Upshift of the valence band edge MTB observed both graphene HOPG whereas downshift found Au(110). For former, magnitudes are different. This explained based static charge model, where an accumulative exists at...