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Complex Structural Dynamics in Non-Crystalline Materials by In Situ Electron Microscopy
Complex Structural Dynamics in Non-Crystalline Materials by In Situ Electron Microscopy
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211152646
- ISBN
- 9798383564363
- DDC
- 620.11
- 저자명
- Huang, Shuoyuan.
- 서명/저자
- Complex Structural Dynamics in Non-Crystalline Materials by In Situ Electron Microscopy
- 발행사항
- [Sl] : The University of Wisconsin - Madison, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 139 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-01, Section: B.
- 주기사항
- Advisor: Voyles, Paul.
- 학위논문주기
- Thesis (Ph.D.)--The University of Wisconsin - Madison, 2024.
- 초록/해제
- 요약Non-crystalline materials, such as glasses, liquids, and liquid crystals, have unique structural and dynamical properties that make them valuable for both materials technologies and fundamental science. The structural dynamics of these materials, which governs processes critical for their fabrications and applications, are not yet fully understood. The lack of well-defined local structural order, combined with the complexity of microscopic dynamics, presents significant challenges for experimental characterization. A powerful set of characterization tools based on four- and five-dimensional scanning transmission electron microscopy (4D/5D STEM) experiments have been developed and used to study the structure and dynamics of glasses and liquids with nanometer resolution. Momentum resolved electron correlation microscopy (ECM) and symmetry-based nanodiffraction analysis have uncovered the interplay between structure, chemistry, and dynamic heterogeneity in multicomponent metallic liquids. Contrary to previous simulation studies, experiments reveal a more significant role for composition than for the topology of packing arrangements. Topological data analysis of 5D STEM experimental data provides quantitative evidence for dynamic facilitation in the spatiotemporal behavior of the same liquid. Finally, in situ 4D STEM experiments revealed exotic phase behavior in a liquid crystal glass, including transitions from liquid crystal to crystal and back to liquid crystal during continuous heating. The process results in unusually straight director field in the final liquid crystal product, which is potentially desirable for electronic applications. These findings further our understanding of the physics of dynamic heterogeneity, glass transition, and transport in non-crystalline systems. The experimental and data analysis techniques developed hold great promise for investigating non-equilibrium processes and phase transformation, with potential implications for the fabrication, stability, and performance of glass or liquid crystal devices.
- 일반주제명
- Materials science
- 일반주제명
- Engineering
- 일반주제명
- Physical chemistry
- 키워드
- Liquid crystals
- 기타저자
- The University of Wisconsin - Madison Materials Science and Engineering
- 기본자료저록
- Dissertations Abstracts International. 86-01B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■007cr#unu||||||||
■020 ▼a9798383564363
■035 ▼a(MiAaPQ)AAI31485875
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a620.11
■1001 ▼aHuang, Shuoyuan.
■24510▼aComplex Structural Dynamics in Non-Crystalline Materials by In Situ Electron Microscopy
■260 ▼a[Sl]▼bThe University of Wisconsin - Madison▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a139 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-01, Section: B.
■500 ▼aAdvisor: Voyles, Paul.
■5021 ▼aThesis (Ph.D.)--The University of Wisconsin - Madison, 2024.
■520 ▼aNon-crystalline materials, such as glasses, liquids, and liquid crystals, have unique structural and dynamical properties that make them valuable for both materials technologies and fundamental science. The structural dynamics of these materials, which governs processes critical for their fabrications and applications, are not yet fully understood. The lack of well-defined local structural order, combined with the complexity of microscopic dynamics, presents significant challenges for experimental characterization. A powerful set of characterization tools based on four- and five-dimensional scanning transmission electron microscopy (4D/5D STEM) experiments have been developed and used to study the structure and dynamics of glasses and liquids with nanometer resolution. Momentum resolved electron correlation microscopy (ECM) and symmetry-based nanodiffraction analysis have uncovered the interplay between structure, chemistry, and dynamic heterogeneity in multicomponent metallic liquids. Contrary to previous simulation studies, experiments reveal a more significant role for composition than for the topology of packing arrangements. Topological data analysis of 5D STEM experimental data provides quantitative evidence for dynamic facilitation in the spatiotemporal behavior of the same liquid. Finally, in situ 4D STEM experiments revealed exotic phase behavior in a liquid crystal glass, including transitions from liquid crystal to crystal and back to liquid crystal during continuous heating. The process results in unusually straight director field in the final liquid crystal product, which is potentially desirable for electronic applications. These findings further our understanding of the physics of dynamic heterogeneity, glass transition, and transport in non-crystalline systems. The experimental and data analysis techniques developed hold great promise for investigating non-equilibrium processes and phase transformation, with potential implications for the fabrication, stability, and performance of glass or liquid crystal devices.
■590 ▼aSchool code: 0262.
■650 4▼aMaterials science
■650 4▼aEngineering
■650 4▼aPhysical chemistry
■653 ▼aElectron microscopy
■653 ▼aLiquid crystals
■653 ▼aRelaxation dynamics
■653 ▼aSupercooled liquids
■653 ▼aElectron correlation microscopy
■690 ▼a0794
■690 ▼a0537
■690 ▼a0494
■71020▼aThe University of Wisconsin - Madison▼bMaterials Science and Engineering.
■7730 ▼tDissertations Abstracts International▼g86-01B.
■790 ▼a0262
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17163267▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
