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Kinetic and Thermodynamic Modeling of Nanowire Growth

Mårtensson, Erik LU (2021)
Abstract
This thesis aims to expand on the fundamental knowledge of crystal growth, selectively focusing on the area of particle-seeded nanowire growth in the III-V materials system. The growth process is complex. It typically occurs via the vapor-liquid-solid method, wherein growth material is supplied in the vapor phase, but the solidification process occurs dynamically, layer by layer, via an intermediary liquid particle. This intermediary phase makes it difficult to assess the correlation between these three phases, and how changes in the vapor phase affect the liquid phase and, in turn, the solidification of the nanowire.

This thesis examines the correlation between the vapor, liquid and solid phases, and how the dynamics of the... (More)
This thesis aims to expand on the fundamental knowledge of crystal growth, selectively focusing on the area of particle-seeded nanowire growth in the III-V materials system. The growth process is complex. It typically occurs via the vapor-liquid-solid method, wherein growth material is supplied in the vapor phase, but the solidification process occurs dynamically, layer by layer, via an intermediary liquid particle. This intermediary phase makes it difficult to assess the correlation between these three phases, and how changes in the vapor phase affect the liquid phase and, in turn, the solidification of the nanowire.

This thesis examines the correlation between the vapor, liquid and solid phases, and how the dynamics of the layer-by-layer growth affects the process. This is done in part by combining experimental nanowire growth using metal-organic vapor phase epitaxy with thermodynamic modeling. The main contributions have been in combining thermodynamics, mass transfer and crystal growth kinetics into kinetic Monte Carlo models, and using these models to gain insights into the growth process.

The findings of this thesis can be used both to further develop future theoretical models, and to aid in the development of experimental growth, by providing fundamental insights of the growth process and the affects of varying the experimentally accessible process parameters. (Less)
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author
supervisor
opponent
  • Prof. Voorhees, Peter W., Northwestern University, USA.
organization
publishing date
type
Thesis
publication status
published
subject
keywords
Nanowire, GaAs, InAs, Monte Carlo, Kinetics, Thermodynamics, III-V, Simulation, Fysicumarkivet A:2021:Mårtensson
publisher
Department of Physics, Lund University
defense location
Lecture hall Rydbergsalen, Department of Physics, Sölvegatan 14, Faculty of Engineering LTH, Lund University, Lund. Zoom: : https://lu-se.zoom.us/j/67026065957?pwd=YTZ6RGVuaXFtRVFqZ1JydGh6NGI5dz09
defense date
2021-10-26 13:15:00
ISBN
978-91-8039-009-5
978-91-8039-008-8
language
English
LU publication?
yes
id
66b5b96d-44fe-4d0b-966c-632cd89ad77a
date added to LUP
2021-09-22 15:54:03
date last changed
2021-10-08 09:34:09
@phdthesis{66b5b96d-44fe-4d0b-966c-632cd89ad77a,
  abstract     = {{This thesis aims to expand on the fundamental knowledge of crystal growth, selectively focusing on the area of particle-seeded nanowire growth in the III-V materials system. The growth process is complex. It typically occurs via the vapor-liquid-solid method, wherein growth material is supplied in the vapor phase, but the solidification process occurs dynamically, layer by layer, via an intermediary liquid particle. This intermediary phase makes it difficult to assess the correlation between these three phases, and how changes in the vapor phase affect the liquid phase and, in turn, the solidification of the nanowire. <br/>	<br/>This thesis examines the correlation between the vapor, liquid and solid phases, and how the dynamics of the layer-by-layer growth affects the process. This is done in part by combining experimental nanowire growth using metal-organic vapor phase epitaxy with thermodynamic modeling. The main contributions have been in combining thermodynamics, mass transfer and crystal growth kinetics into kinetic Monte Carlo models, and using these models to gain insights into the growth process.<br/>	<br/>The findings of this thesis can be used both to further develop future theoretical models, and to aid in the development of experimental growth, by providing fundamental insights of the growth process and the affects of varying the experimentally accessible process parameters.}},
  author       = {{Mårtensson, Erik}},
  isbn         = {{978-91-8039-009-5}},
  keywords     = {{Nanowire; GaAs; InAs; Monte Carlo; Kinetics; Thermodynamics; III-V; Simulation; Fysicumarkivet A:2021:Mårtensson}},
  language     = {{eng}},
  publisher    = {{Department of Physics, Lund University}},
  school       = {{Lund University}},
  title        = {{Kinetic and Thermodynamic Modeling of Nanowire Growth}},
  url          = {{https://lup.lub.lu.se/search/files/102773325/ErikMartenssonThesisWeb.pdf}},
  year         = {{2021}},
}