An atomically thin MoSe layer has been synthesized on mica using molecular beam epitaxy (MBE). The polymorphous of the MoSe layer depends on the coverage and the growth temperature. At low coverages and low growth temperature, 1T-MoSe forms in addition to a comparable quantity of 2H-MoSe. The metastable 1T-MoSe transfers gradually to the stable 2H-MoSe before the completion of the first monolayer. The current result sheds some light on the complexity of the nucleation and growth of transition metal dichalcogenide (TMDC) monolayers and implies a possible route for a phase selective synthesis using MBE.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1088/1361-6528/ab884b | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A scalable solar-driven photocatalytic system for separated H and O production from water.
Nat Commun
January 2025
State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, China.
Solar-driven photocatalytic water splitting offers a sustainable pathway to produce green hydrogen, yet its practical application encounters several challenges including inefficient photocatalysts, sluggish water oxidation, severe reverse reactions and the necessity of separating produced hydrogen and oxygen gases. Herein, we design and develop a photocatalytic system composed of two separate reaction parts: a hydrogen evolution cell containing halide perovskite photocatalysts (MoSe-loaded CH(NH)PbBrI) and an oxygen evolution cell containing NiFe-layered double hydroxide modified BiVO photocatalysts. These components are bridged by a I/I redox couple to facilitate electron transfer, realizing efficient overall water splitting with a solar-to-hydrogen conversion efficiency of 2.
View Article and Find Full Text PDFComputational Assessment of - Curves and Tunability of 2D Semiconductor van der Waals Heterostructures.
Nano Lett
January 2025
Department of Physics, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden.
Two-dimensional (2D) transition metal dichalcogenides (TMDs) have received significant interest for use in tunnel field-effect transistors (TFETs) due to their ultrathin layers and tunable band gap features. In this study, we used density functional theory (DFT) to investigate the electronic properties of six TMD heterostructures, namely, MoSe/HfS, MoTe/ZrS, MoTe/HfS, WSe/HfS, WTe/ZrS, and WTe/HfS, focusing on variations in band alignments. We demonstrate that WTe/ZrS and WTe/HfS have the smallest band gaps (close to 0 or broken) from the considered set.
View Article and Find Full Text PDFStabilizing Single-Atom Catalysts on Metastable Phases of Transition Metal Dichalcogenides.
J Phys Chem Lett
January 2025
Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China.
Single-atom catalysts have attracted a significant amount of attention due to their exceptional atomic utilization and high efficiency in a range of catalytic reactions. However, these systems often face thermodynamic instability, leading to agglomeration under the operational conditions. In this study, we investigate the interactions of 12 types of catalytic atoms (Fe, Co, Ni, Cu, Ru, Rh, Pd, Ag, Ir, Pt, Au, and Bi) on three crystalline phases (1T, 1T', and 2H) of six transition metal dichalcogenide layers (MoS, MoSe, MoTe, WS, WSe, and WTe) using first-principles calculations.
View Article and Find Full Text PDFStructural-morphological insights into optimization of hydrothermally synthesized MoSe nanoflowers for improving supercapacitor applications.
Dalton Trans
January 2025
Department of Physics, RPS Degree College, Balana, Mahendergarh, Haryana 123029, India.
The present work reports a clear and improved hydrothermal methodology for the synthesis of MoSe nanoflowers (MNFs) at 210 °C. To observe the effect of temperature on the fascinating properties, the process temperature was modified by ±10 °C. The as-prepared MNFs were found to consist of 2D nanosheets, which assembled into a 3D flower-like hierarchical morphology van der Waals forces.
View Article and Find Full Text PDFModification of the Se/MoO Rear Interface for Efficient Wide-Band-Gap Trigonal Selenium Solar Cells.
ACS Appl Mater Interfaces
January 2025
Institute of New Energy Technology, College of Physics & Optoelectronic Engineering, Jinan University, Guangzhou 510632, China.
Trigonal selenium (t-Se) is a promising wide-band-gap photovoltaic material with a high absorption coefficient, abundant resources, simple composition, nontoxicity, and a low melting point, making it suitable for absorbers in advanced indoor and tandem photovoltaic applications. However, severe electrical losses at the rear interface of the t-Se absorber, caused by work function and lattice mismatches, limit the voltage output and overall performance. In this study, a strategy to enhance carrier transport and collection by modifying interfacial chemical interactions is proposed.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!