Fabrication And Physical Properties Of Novel Two Dimensional Crystal Materials Beyond Graphene Germanene Hafnene And Ptse2

This thesis reports on essential experimental work in the field of novel two-dimensional (2D) atomic crystals beyond graphene. It especially describes three new 2D crystal materials, namely germanene, hafnene, and monolayer PtSe2 fabricated experimentally for the first time, using an ultra-high vacuum molecular beam epitaxy (UHV-MBE) system. Multiple characterization techniques, including scanning tunneling microscope (STM), low energy electron diffraction (LEED), scanning transmission electron microscope (STEM), and angle-resolved photoemission spectroscopy (ARPES), combined with theoretical studies reveal the materials atomic and electronic structures, which allows the author to further investigate their physical properties and potential applications. In addition, a new epitaxial growth method for transition metal dichalcogenides involving direct selenization of metal supports is developed. These studies represent a significant step forward in expanding the family of 2D crystal materials and exploring their application potentials in future nanotechnology and related areas.

This thesis reports on essential experimental work in the field of novel two-dimensional (2D) atomic crystals beyond graphene. It especially describes three new 2D crystal materials, namely germanene, hafnene, and monolayer PtSe2 fabricated experimentally for the first time, using an ultra-high vacuum molecular beam epitaxy (UHV-MBE) system. Multiple characterization techniques, including scanning tunneling microscope (STM), low energy electron diffraction (LEED), scanning transmission electron microscope (STEM), and angle-resolved photoemission spectroscopy (ARPES), combined with theoretical studies reveal the materials’ atomic and electronic structures, which allows the author to further investigate their physical properties and potential applications. In addition, a new epitaxial growth method for transition metal dichalcogenides involving direct selenization of metal supports is developed. These studies represent a significant step forward in expanding the family of 2D crystal materials and exploring their application potentials in future nanotechnology and related areas.

Defects in Two-Dimensional Materials addresses the fundamental physics and chemistry of defects in 2D materials and their effects on physical, electrical and optical properties. The book explores 2D materials such as graphene, hexagonal boron nitride (h-BN) and transition metal dichalcogenides (TMD). This knowledge will enable scientists and engineers to tune 2D materials properties to meet specific application requirements. The book reviews the techniques to characterize 2D material defects and compares the defects present in the various 2D materials (e.g. graphene, h-BN, TMDs, phosphorene, silicene, etc.). As two-dimensional materials research and development is a fast-growing field that could lead to many industrial applications, the primary objective of this book is to review, discuss and present opportunities in controlling defects in these materials to improve device performance in general or use the defects in a controlled way for novel applications. Presents the theory, physics and chemistry of 2D materials Catalogues defects of 2D materials and their impacts on materials properties and performance Reviews methods to characterize, control and engineer defects in 2D materials

Two-dimensional materials have had widespread applications in nanoelectronics, catalysis, gas capture, water purification, energy storage and conversion. Initially based around graphene, research has since moved on to looking at alternatives, including transitions metal dichalcogenides, layered topological insulators, metallic mono-chalcogenides, borocarbonitrides and phosphorene. This book provides a review of research in the field of these materials, including investigation into their defects, analysis on hybrid structures focusing on their properties and synthesis, and characterization and applications of 2D materials beyond graphene. It is designed to be a single-point reference for students, teachers and researchers of chemistry and its related subjects, particularly in the field of nanomaterials. Contents: Transition Metal Dichalcogenides and Other Layered Materials (Manoj K Jana and C N R Rao)Topological Valleytronics (Motohiko Ezawa)Two-Dimensional, Layered Materials as Catalysts for Oxygen Reduction Reaction (Debdyuti Mukherjee and S Sampath)Phosphorene (Arpita Paul and Umesh V Waghmare)2D van der Waals Hybrid: Structures, Properties and Devices (Md Ali Aamir, Tanweer Ahmed, Kimberly Hsieh, Saurav Islam, Paritosh Karnatak, Ranjit Kashid, Phanibhusan Singha Mahapatra, Jayanta Mishra, Tathagata Paul, Avradip Pradhan, Kallol Roy, Anindita Sahoo and Arindam Ghosh)Thermoelectric Energy Conversion in Layered Metal Chalcogenides (Satya N Guin, Ananya Banik and Kanishka Biswas)Plasma Chemical and Physical Vapour Deposition Methods and Diagnostics for 2D Materials (Majed A. Alrefae, Nicholas R Glavin, Andrey A Voevodin and Timothy S Fisher)Metal Contacts to MOS2 (Naveen Kaushik, Sameer Grover, Mandar M Deshmukh and Saurabh Lodha)Strain Dependent Properties of 2D MX2 (M = Mo and W; X = S, Se and Te) (Tribhuwan Pandey, Swastibrata Bhattacharyya and Abhishek K Singh)Point Defects, Grain Boundaries and Planar Faults in 2D h-BN and TMX2 Theory and Simulations (Anjali Singh and Umesh V Waghmare) Readership: Students, teachers and researchers of chemistry and its related subjects, particularly in the field of nanomaterials. Keywords:2D Materials;Borocarbonitrides;Phosphorene;Graphene;Catalysis;Nanomaterials;Gas Capture;Water Purification;Dichalcogenides;Topological Insulators;Mono-chalcogenidesReview:0

This book presents selected papers from the fourth edition of the GraphX conference series, GraphITA 2015. Its content range from fundamentals to applications of graphene and other 2D material such as silicene, BN and MoS2. The newest technological challenges in the field are described in this book, written by worldwide known scientists working with 2D materials.The chapter 'Morphing Graphene-Based Systems for Applications: Perspectives from Simulations' is published open access under a CC BY 4.0 license.

Graphene: Fabrication, Characterizations, Properties and Applications presents a comprehensive review of the current status of graphene, especially focused on synthesis, fundamental properties and future applications, aiming to giving a comprehensive reference for scientists, researchers and graduate students from various sectors. Graphene, a single atomic layer of carbon hexagons, has stimulated a lot of research interest owing to its unique structure and fascinating properties. The book is devoted to understanding graphene fundamentally yet comprehensively through a wide range of issues in the areas of materials science, chemistry, physics, electronics and biology. The book is an important resource of comprehensive knowledge pertinent to graphene and to related expanding areas. This valuable book will attract scientists, researchers and graduate students in physics and chemistry because it aims at providing all common knowledge of these communities including essential aspects of material synthesis and characterization, fundamental physical properties and detailed chapters focused on the most promising applications. Presents a comprehensive and up-to-date review of current research of graphene, especially focused on synthesis, fundamental properties and future applications Includes not only fundamental knowledge of graphene materials, but also an overview of special properties for different potential applications of graphene in the fields of solar cells, photodetectors, energy storage, composites, environmental materials and bio-materials Emphasizes graphene-based applications that are quickly emerging as potential building blocks for nanotechnological commercial applications

This book highlights the versatility of graphene focusing on the background of graphene, its overall structure, superior properties, fabrication routes, characterization techniques, graphene composites/derivatives, and potential applications. A remarkable surge in interest for graphene and its applications has resulted in a substantial increase in the number of publications in terms of reviews and scientific articles, books and patents. Therefore, this book essentially addresses a wide range of graphene research and provides a great resource for beginners, students in sciences or engineering, researchers, professionals, and materials scientists. ​

Filling the gap between publications for industrial developers and academic researchers on graphene synthesis and its applications, this book presents the essential aspects for the successful upscaling of graphene production. After an introduction to graphene, its synthesis and characterization, the text covers a wide variety of graphene composites and compounds. The larger part of the book discusses various applications where graphene has been successfully integrated into technologies, including uses in the energy sector, oil and gas industry, biomedical areas, sensors and coatings. Finally, the book concludes with a summary and a look at the future of graphene technology, including a market review. With its focus on applications, this is equally useful for both academic and industrial users.