Defects in self-catalysed III-V nanowires / / James A. Gott

• Record Nr.: UNINA9910522952103321
• Autore: Gott James A.
• Pubbl/distr/stampa: Cham, Switzerland : , : Springer, , [2022]; ©2022
• ISBN: 9783030940621; 9783030940614
• Descrizione fisica: 1 online resource (158 pages)
• Collana: Springer Theses
• Disciplina: 621.3815
• Soggetti: Nanowires; Semiconductors - Materials; Semiconductors - Defects
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Nota di bibliografia: Includes bibliographical references and index.
• Nota di contenuto: Intro -- Supervisor's Foreword -- Abstract -- Acknowledgements -- Contents -- Acronyms -- 1 Introduction -- 1.1 Introduction -- 1.2 Nanowires -- 1.2.1 Introduction to Nanowires -- 1.2.2 Nanowire Growth -- 1.2.3 Physical Properties -- 1.2.4 Applications -- 1.3 Defects in the III-V System -- 1.3.1 Defects in Nanowires -- 1.3.2 Mechanisms of Defect Motion -- 1.4 Nanowire Heterostructures -- 1.4.1 Dubrovskii Kinetic Growth Model -- 1.4.2 Priante/Glas Model -- 1.4.3 Muraki Model -- 1.4.4 Empirical Sigmoidal Models -- 1.4.5 Measuring Heterostructure Features Using STEM -- 1.5 Thesis Outline -- References -- 2 Methods -- 2.1 Electron Microscopy -- 2.1.1 Illumination System -- 2.1.2 Aberrations -- 2.1.3 Sample Interaction -- 2.1.4 TEM -- 2.1.5 STEM -- 2.1.6 SEM -- 2.1.7 Microscopes -- 2.2 Sample Preparation -- 2.2.1 Sample Growth -- 2.2.2 Microtome -- 2.2.3 Conventional TEM and STEM Preparation -- 2.2.4 In-Situ Microscopy -- 2.3 Simulations -- 2.4 Measuring Strain Using GPA -- 2.5 Spectroscopy -- 2.5.1 Cathodoluminescence -- 2.5.2 Energy Dispersive X-Ray Spectroscopy -- References -- 3 Defects in Nanowires -- 3.1 Introduction -- 3.2 Types of Defects in GaAs(P) Nanowires -- 3.2.1 Analysing Burgers Vectors -- 3.2.2 Σ3 {112} Defect-The Three Monolayer Defect -- 3.2.3 Defects with Non-Zero ; Burgers Vector -- 3.3 Defect Origin -- 3.4 Cross-Sections of Defective Nanowires -- 3.5 Effect on Nanowire Properties -- 3.6 Chapter Summary -- References -- 4 Defect Dynamics in Nanowires -- 4.1 Introduction -- 4.2 Forces Behind Defect Motion in Nanowires -- 4.3 Motion of 3 Monolayer Defects -- 4.3.1 Complete Removal of Defect from the Nanowire -- 4.3.2 Movement Stopped by Interactions -- 4.3.3 No Movement: Stable Configurations -- 4.4 Velocity Analysis -- 4.5 Motion of More Complicated Defect Configurations -- 4.6 Chapter Summary -- References.; 5 Interfaces in Nanowire Axial Heterostructures -- 5.1 Introduction -- 5.2 GaAsP-GaAs-GaAsP Quantum Dots in Self-Catalysed Nanowires -- 5.2.1 Converting ADF Intensity to Composition -- 5.3 Interface Models -- 5.3.1 Dubrovskii's Kinetic Model -- 5.3.2 Comparing Models -- 5.4 Interface Width -- 5.5 Size of Quantum Dots -- 5.6 Chapter Summary -- References -- 6 Conclusions and Future Work.