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Transmorphic Nucleation of Solids in Liquid Thin Films
Transmorphic Nucleation of Solids in Liquid Thin Films
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211153147
- ISBN
- 9798384486305
- DDC
- 620.11
- 저자명
- Shen, Bonan.
- 서명/저자
- Transmorphic Nucleation of Solids in Liquid Thin Films
- 발행사항
- [Sl] : Columbia University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 131 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-04, Section: B.
- 주기사항
- Advisor: Im, James S.
- 학위논문주기
- Thesis (Ph.D.)--Columbia University, 2024.
- 초록/해제
- 요약This dissertation focuses on identifying and analyzing the mechanism of solid nucleation in liquid thin films. In doing so, we identify and describe a previously unrecognized mechanism of nucleation in condensed systems referred to as transmorphic nucleation. This cluster-shape-change-based mechanism is revealed as a general heterogeneous nucleation mechanism applicable to discontinuous phase transformations occurring in continuous or pre-patterned thin films, as well as in numerous materials systems that possess morphologically and chemically non-trivial heterogeneous-nucleation-catalyzing interfaces (e.g., polycrystalline materials, embedded nano-crystals, and materials with structured interfaces).Identifying, deciphering, and modeling the nature and details associated with how a new phase can nucleate in thin-film materials can be both scientifically meaningful for understanding discontinuous phase transformations in general, and technologically important for engineering various thin-film-based and nano-material-based applications and devices in particular. Classical nucleation theory (CNT) has long been established and regarded as the most practicable treatment that captures the thermodynamic and kinetic essence of the nucleation phenomenon in condensed systems in the simplest and most effective manner. Through a close examination of the theory, we identify and propose morphological equilibrium hypothesis (MEH) as an essential element of CNT. Our shape-transition-based model for transmorphic nucleation in thin films presented in this thesis illustrates that this hypothesis can be violated. As such, the CNT formulation is lacking in capturing the occurrence of the MEH-deviating shape evolution of the clusters, as for instance encountered during the process of transmorphic nucleation.In this dissertation, we conceptually, theoretically, and numerically examine and analyze the kinetic pathway through which nucleation of solids takes place in encapsulated liquid thin films. This example was selected for investigation because it is a particularly simple system, which in turn permits one to make clear, definitive, and general conclusions. A new nucleation mechanism of transmorphic nucleation is discovered in the process. This mechanism is defined generally as the nucleation mechanism through which supercritical clusters are generated from subcritical clusters during an irreversible and morphological-equilibrium-deviating shape evolution initiated when the fluctuating embryos encounter a local growth-inducing element in the catalyzing interface. Both thermodynamic and kinetic analyses in accordance with our transmorphic nucleation mechanism are carried out using a novel adaptation of established theoretical formulations and numerical modeling methods. The kinetic pathway of transmorphic nucleation is described, and transmorphic nucleation temperature window is thermodynamically identified. The kinetic aspect of transmorphic nucleation in thin films is uniquely captured by keeping track of two coupled population distribution profiles of equilibrium-morphology-adhering cluster shapes.Overall, the thesis starts with critical and deconstructive examination of CNT. It builds on our theory of phase initiation and evolution in condensed systems, i.e., Gibbs-Thomson variation (GTV) and Gibbs-Thomson function (GTF), and our interpretation of CNT to investigate steady-state and transient transmorphic nucleation in thin films. The thesis also examines and analyzes all other modes of shape-transition-affected nucleation in thin films outside the transmorphic nucleation domain to provide the comprehensive description of the entire map of nucleation mechanisms in thin-film systems. As far as the implications of the current work on the classical theory of nucleation is concerned, we illustrate how the phenomenon of transmorphic nucleation which violates MEH that forms the basis of CNT, reveals this previously unrecognized limitation of the current formulation of the classical theory of nucleation. The results presented in this dissertation further show that the GTV-based approach, which we identify as the foundation upon which CNT is formulated, can address the MEH-violating shape evolution of subcritical to supercritical clusters.
- 일반주제명
- Materials science
- 일반주제명
- Nuclear engineering
- 일반주제명
- Nanoscience
- 일반주제명
- Morphology
- 키워드
- Nucleation
- 키워드
- Thin films
- 키워드
- Solid nucleation
- 기타저자
- Columbia University Materials Science and Engineering
- 기본자료저록
- Dissertations Abstracts International. 86-04B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211153147
■006m o d
■007cr#unu||||||||
■020 ▼a9798384486305
■035 ▼a(MiAaPQ)AAI31631689
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a620.11
■1001 ▼aShen, Bonan.
■24510▼aTransmorphic Nucleation of Solids in Liquid Thin Films
■260 ▼a[Sl]▼bColumbia University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a131 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-04, Section: B.
■500 ▼aAdvisor: Im, James S.
■5021 ▼aThesis (Ph.D.)--Columbia University, 2024.
■520 ▼aThis dissertation focuses on identifying and analyzing the mechanism of solid nucleation in liquid thin films. In doing so, we identify and describe a previously unrecognized mechanism of nucleation in condensed systems referred to as transmorphic nucleation. This cluster-shape-change-based mechanism is revealed as a general heterogeneous nucleation mechanism applicable to discontinuous phase transformations occurring in continuous or pre-patterned thin films, as well as in numerous materials systems that possess morphologically and chemically non-trivial heterogeneous-nucleation-catalyzing interfaces (e.g., polycrystalline materials, embedded nano-crystals, and materials with structured interfaces).Identifying, deciphering, and modeling the nature and details associated with how a new phase can nucleate in thin-film materials can be both scientifically meaningful for understanding discontinuous phase transformations in general, and technologically important for engineering various thin-film-based and nano-material-based applications and devices in particular. Classical nucleation theory (CNT) has long been established and regarded as the most practicable treatment that captures the thermodynamic and kinetic essence of the nucleation phenomenon in condensed systems in the simplest and most effective manner. Through a close examination of the theory, we identify and propose morphological equilibrium hypothesis (MEH) as an essential element of CNT. Our shape-transition-based model for transmorphic nucleation in thin films presented in this thesis illustrates that this hypothesis can be violated. As such, the CNT formulation is lacking in capturing the occurrence of the MEH-deviating shape evolution of the clusters, as for instance encountered during the process of transmorphic nucleation.In this dissertation, we conceptually, theoretically, and numerically examine and analyze the kinetic pathway through which nucleation of solids takes place in encapsulated liquid thin films. This example was selected for investigation because it is a particularly simple system, which in turn permits one to make clear, definitive, and general conclusions. A new nucleation mechanism of transmorphic nucleation is discovered in the process. This mechanism is defined generally as the nucleation mechanism through which supercritical clusters are generated from subcritical clusters during an irreversible and morphological-equilibrium-deviating shape evolution initiated when the fluctuating embryos encounter a local growth-inducing element in the catalyzing interface. Both thermodynamic and kinetic analyses in accordance with our transmorphic nucleation mechanism are carried out using a novel adaptation of established theoretical formulations and numerical modeling methods. The kinetic pathway of transmorphic nucleation is described, and transmorphic nucleation temperature window is thermodynamically identified. The kinetic aspect of transmorphic nucleation in thin films is uniquely captured by keeping track of two coupled population distribution profiles of equilibrium-morphology-adhering cluster shapes.Overall, the thesis starts with critical and deconstructive examination of CNT. It builds on our theory of phase initiation and evolution in condensed systems, i.e., Gibbs-Thomson variation (GTV) and Gibbs-Thomson function (GTF), and our interpretation of CNT to investigate steady-state and transient transmorphic nucleation in thin films. The thesis also examines and analyzes all other modes of shape-transition-affected nucleation in thin films outside the transmorphic nucleation domain to provide the comprehensive description of the entire map of nucleation mechanisms in thin-film systems. As far as the implications of the current work on the classical theory of nucleation is concerned, we illustrate how the phenomenon of transmorphic nucleation which violates MEH that forms the basis of CNT, reveals this previously unrecognized limitation of the current formulation of the classical theory of nucleation. The results presented in this dissertation further show that the GTV-based approach, which we identify as the foundation upon which CNT is formulated, can address the MEH-violating shape evolution of subcritical to supercritical clusters.
■590 ▼aSchool code: 0054.
■650 4▼aMaterials science
■650 4▼aNuclear engineering
■650 4▼aNanoscience
■650 4▼aMorphology
■653 ▼aNucleation
■653 ▼aPhase transformations
■653 ▼aThin films
■653 ▼aSolid nucleation
■653 ▼aClassical nucleation theory
■690 ▼a0794
■690 ▼a0565
■690 ▼a0552
■690 ▼a0287
■71020▼aColumbia University▼bMaterials Science and Engineering.
■7730 ▼tDissertations Abstracts International▼g86-04B.
■790 ▼a0054
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17165194▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


