Fabrication and Physical Properties of Novel Two-dimensional Crystal Materials Beyond Graphene: Germanene, Hafnene and PtSe2

Supervisor’s Foreword

Parts of this thesis have been published in the following journal articles:

Acknowledgements

Contents

Abbreviations

1 Introduction

1.1 The Rise and Development of Graphene-Like 2D Crystal Materials

1.1.1 From Graphene to Graphene-Like 2D Crystal Materials

1.1.2 Synthesis and Characterization

1.2 Silicene and Germanene

1.2.1 Theoretical Investigations

1.2.2 Experimental Explorations

1.3 Transition Metal Dichalcogenides

1.3.1 The Rise of TMDs

1.3.2 Structural Properties of TMDs

1.3.3 Electronic Properties of TMDs

1.3.4 Synthesis of TMDs

1.3.5 Applications of TMDs

1.4 h-BN and Other Graphene-Like 2D Materials

1.5 Van der Waals Heterostructures

1.6 Research Contents and Instruments

1.6.1 Research Contents

1.6.2 Introduction of Instruments

References

2 Germanene on Pt(111)

2.1 Background

2.1.1 From Silicene to Germanene

2.1.2 Early Exploration of Germanene Growth

2.2 Fabrication and Computation Methods

2.3 Structural Characterizations and Theoretical Calculations

2.4 Summary and Outlook

References

3 Hafnene on Ir(111)

3.1 Background

3.2 Preparation and STM Study

3.3 Theoretical Calculations of Atomic and Electronic Structures

3.4 Bilayer Hafnene and Hafnene Grown on Other Supports

3.5 Summary and Outlook

References

4 Monolayer PtSe2

4.1 Background

4.2 Growth and Atomic Structure

4.3 Electronic Structure

4.4 Photocatalytic Properties

4.4.1 Experimental Setups

4.4.2 Photocatalytic Characterizations

4.5 Valleytronics

4.6 Summary and Outlook

References

5 Conclusions and Prospect