Growth of Antimony on Copper. A Scanning Tunneling Microscopy Study

 
 
Diplomica Verlag
  • 1. Auflage
  • |
  • erschienen im September 2017
  • |
  • 152 Seiten
 
E-Book | PDF ohne DRM | Systemvoraussetzungen
978-3-96067-662-1 (ISBN)
 
This study investigates the Copper(111) - Antimony (Sb) system which is characterized by a complex interplay between adsorbate interactions and adsorbate substrate interactions which manifest through self-assembly processes. Surface sensitive techniques such as Low Energy Electron Diffraction and Auger Electron Spectroscopy were utilized to determine the substrate cleanliness prior to the growth of monolayer Sb coverage. The surface chemical reactivity on an atom-by-atom basis of the Cu sample surface was studied by current imaging tunneling spectroscopy.
The use of surface sensitive techniques in studying the surface alloy in question allows for more precise statements to be made about the surface structure of the system at various temperatures. Based on the experimental results, a comprehensive study of the adsorption and segregation behavior of Sb on Cu(111), including the mechanisms for phase formation at the atomic scale, is presented in this study.
weitere Ausgaben werden ermittelt
  • Growth of Antimony on Copper. A Scanning Tunneling Microscopy Study
  • ACKNOWLEDGMENTS
  • ABSTRACT
  • KEY WORDS
  • TABLE OF CONTENTS
  • ACCRONYMS
  • CHAPTER 1 INTRODUCTION
  • 1.1 Background
  • 1.2 Objectives of present work
  • 1.3 Thesis outline
  • 1.4 References
  • CHAPTER 2 THEORY
  • 2.1 The FCC(111) surface structure
  • 2.2 Relaxation and reconstruction of surfaces
  • 2.2.1 Relaxation
  • 2.2.2 Reconstruction of clean surfaces
  • 2.2.3 Adsorbate-induced reconstruction
  • 2.3 Adsorption
  • 2.4 Kinetics of adsorption
  • 2.5 The 3rd root structures on (111) FCC metal surfaces
  • 2.6 Dynamics of adatoms diffusion
  • 2.7 Interaction at the surface
  • 2.7.1 Influence of adsorbates on surfaces
  • 2.8 Types of growth
  • 2.8.1 Frank-van der Merwe (FM) or layer-by layer
  • 2.8.2 Volmer-Weber (VW) or 3D island
  • 2.8.3 Stranski-Krastanow (SK) or 3D island-on wetting-layer growth
  • 2.9 Introduction to Segregation
  • 2.10 The modified Darken model
  • 2.11 References
  • CHAPTER 3 SCANNING TUNNELING MICROSCOPY (STM)
  • 3.1 Introduction
  • 3.2 Electron tunneling
  • 3.3 STM principle of operation
  • 3.4 Tunneling current
  • 3.5 Bardeen theory of tunneling
  • 3.6 Modes of operation
  • 3.6.1 Constant current imaging mode
  • 3.6.2 Constant height imaging mode
  • 3.7 Scanning Tunneling Spectroscopy (STS)
  • 3.7.1 Current Imaging Tunneling Spectroscopy (CITS)
  • 3.7.2 Constant Current Spectroscopy
  • 3.7.3 Constant Voltage Spectroscopy
  • 3.8 STM Major Components
  • 3.8.1 Vibration Isolation
  • 3.8.2 Electronic feedback control system
  • 3.8.3 The STM Tip
  • 3.8.4 Images and Filtering
  • 3.9 Atomic resolution on well known substrates
  • 3.10 Highly Oriented Pyrolytic Graphite (HOPG)
  • 3.10.1 Experimental
  • 3.10.2 Results and Discussion
  • 3.11 Si(111) - 7x7 reconstruction
  • 3.11.1 Experimental
  • 3.11.2 Results and Discussion
  • 3.12 References
  • CHAPTER 4 EXPERIMENTAL FACILITIES AND PROCEDURES
  • 4.1 Tip fabrication
  • 4.2 Characterization Techniques
  • 4.2.1 The UHV variable temperature STM system
  • 4.2.2 Low-energy electron diffraction (LEED)
  • 4.2.3 Auger electron spectroscopy (AES)
  • 4.3 References
  • CHAPTER 5 DISSOLUTION OF SB ON CU(111)
  • 5.1 Introduction
  • 5.2 Experimental procedure
  • 5.3 Results and Discussion
  • 5.3.1 Atomically clean Cu(111)
  • 5.4 Growth of Sb on clean Cu(111) surfaces
  • 5.5 Stages of dissolution
  • 5.5.1 Annealing at 360°C
  • 5.5.2 Annealing at 400°C
  • 5.5.3 Annealing at 600°C
  • 5.5.4 Annealing at 700°C
  • 5.6 Segregation of Sb on Cu(111)
  • 5.7 Summary
  • 5.8 References
  • CHAPTER 6 SCANNING TUNNELING SPECTROSCOPY (STS)
  • 6.1 Introduction
  • 6.2 STS of Cu(111) at room temperature
  • 6.3 Summary
  • 6.4 References
  • CHAPTER 7 SUMMARY AND CONCLUSION
  • FUTURE PROSPECTS
  • PUBLICATIONS
  • INTERNATIONAL MEETINGS AND CONFERENCES
  • LOCAL MEETINGS AND CONFERENCES
  • AWARDS

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