Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/166604
Title: Synthesis and characterization of 2D 3R-phase Mo₀.₄₅W₀.₅₅S₂
Authors: Wang, Mowei
Keywords: Engineering::Materials::Microelectronics and semiconductor materials
Issue Date: 2023
Publisher: Nanyang Technological University
Source: Wang, M. (2023). Synthesis and characterization of 2D 3R-phase Mo₀.₄₅W₀.₅₅.S₂. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/166604
Abstract: Transition metal dichalcogenides (TMDs) such as MoS2 and WS2 are a trending research topic in the field of 2D materials for microelectronic devices. However, there has not been much research work on the 3R phase, a polytype of TMD which exhibits unique electronic and optical properties. In this project, 3R phase Mo0.45W0.55S2, a newly synthesised material by chemical vapour transport (CVT) was studied. The characterization of its composition and structure was done by energy dispersive X-ray spectroscopy and scanning transmission electron microscopy. Mechanical exfoliation methods were extensively studied and optimised to isolate high yield 2D 3R Mo0.45W0.55S2 layers for applications. Layer dependent properties of 3R Mo0.45W0.55S2 were characterized by atomic force microscope, Raman spectroscopy and photoluminescence spectroscopy. It is believed that the data obtained in this project will provide a valuable reference for future studies of Mo0.45W0.55S2. The described scotch tape exfoliation method with optimised parameters could also be used for efficient isolation of 2D layers of any TMD materials.
URI: https://hdl.handle.net/10356/166604
Schools: School of Materials Science and Engineering 
Fulltext Permission: restricted
Fulltext Availability: With Fulltext
Appears in Collections:MSE Student Reports (FYP/IA/PA/PI)

Files in This Item:
File Description SizeFormat 
fyp wangmowei.pdf
  Restricted Access
2.11 MBAdobe PDFView/Open

Page view(s)

128
Updated on May 23, 2024

Download(s)

5
Updated on May 23, 2024

Google ScholarTM

Check

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.