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On the Development of Tools for the Study of Colloidal Self-Assembly
On the Development of Tools for the Study of Colloidal Self-Assembly
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211152102
- ISBN
- 9798382739786
- DDC
- 660
- 저자명
- Butler, Brandon.
- 서명/저자
- On the Development of Tools for the Study of Colloidal Self-Assembly
- 발행사항
- [Sl] : University of Michigan, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 119 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 85-12, Section: B.
- 주기사항
- Advisor: Glotzer, Sharon.
- 학위논문주기
- Thesis (Ph.D.)--University of Michigan, 2024.
- 초록/해제
- 요약Self-assembly is the process by which a material organizes itself without the need for external stimuli. This process spans a broad range of phenomena, from the crystallization of solids from atoms and molecules to the formation of micelles and cell membranes by amphiphilic molecules to the organization of colloidal crystals from nanoparticles. Understanding these phase transitions is essential to the intelligent development of new materials and structures and in particular for controlling the thermodynamic and kinetic pathways for assembly. Enabling such control will allow for currently impossible to access phases, precision in defect sizes and amounts and control of other knobs of phase design at various length scales.In Chapter 1, we describe the phenomena and challenges to detailed investigation of assembly pathways that this dissertation addresses.In Chapter 2, we outline two methods used throughout the dissertation.In Chapter 3, we present a six-step pipeline and Python package, dupin, we developed for detecting events from particle trajectories. The detection of transitions in particle-based (e.g. molecular) simulations is typically handled in an ad hoc way, while dupin provides a generalized detection scheme that maintains interpretability and permits comparison among disparate systems and pathways. Furthermore, by automating the detection of events associated with phase transformations, dupin enables self-assembly studies at larger length and time scales than previously feasible by removing the operator from the data-processing loop. We conclude Chapter 3 with example applications of dupin to the study of self-assembly.In Chapter 4, we outline and discuss a new order parameter that quantifies the symmetry of local particle environments. During the formation of crystals, particles organize themselves locally into motifs with new symmetries that may or may not be present in the fluid or the final crystal structure. The "Point Group Order Parameter", PGOP, identifies the point group symmetry of an individual particle's local environment. By identifying these local motifs and how they change over time, we can learn how a fluid chooses a particular kinetic pathway to follow. We compare PGOP to other commonly used local order parameters and, through examples, show how it provides a useful level of description not accessible to other order parameters. The chapter begins with an outline of the algorithm that is quickly followed by various demonstrations of PGOP's ability to detect and quantify local order in noisy crystalline systems with/without defects and even amorphous phases.In Chapter 5, we present another new order parameter we developed for studying phase transformations. This new order parameter consists of a group of functions that form a vector of continuous local coordination numbers, CNv , in a system of particles. The well-known local coordination number, CN, is defined for particle-based systems as the number of particles that are first nearest neighbors to a given particle. Consequently, CN takes on only discrete integer values, which can be problematic when used as a local order parameter due to fluctuations from thermal effects. CNv smooths CN into a continuous value - essentially a dimensionless local density - making it useful in self-assembly studies in which thermal noise and other forces can cause discontinuous changes in CN. To do this, CNv uses the area of facets in Voronoi tessellation polytopes to weigh neighbor contributions to a coordination shell. We provide a detailed description of CNv and demonstrate its usefulness in noisy systems and in combination with PGOP.In Chapter 6, we discuss our software development contributions to HOOMD-blue, our group's open source Python simulation toolkit, for its version 3 release. This release included a complete redesign of the application programming interface, various ways to extend molecular dynamics and Monte Carlo simulations of particle-based systems in Python and direct access to HOOMD-blue's internal data buffers. These advancements facilitated numerous new simulation protocols and methodologies while reducing the human capital necessary for the design of new simulation techniques.We conclude my dissertation in Chapter 7 with a summary of the preceding chapters and provide a forward-looking perspective regarding further work and the potential new applications of our work in the field of self-assembly.
- 일반주제명
- Chemical engineering
- 일반주제명
- Applied physics
- 일반주제명
- Condensed matter physics
- 키워드
- Colloids
- 키워드
- Self-assembly
- 키워드
- Order parameters
- 기타저자
- University of Michigan Chemical Engineering
- 기본자료저록
- Dissertations Abstracts International. 85-12B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■020 ▼a9798382739786
■035 ▼a(MiAaPQ)AAI31349034
■035 ▼a(MiAaPQ)umichrackham005384
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a660
■1001 ▼aButler, Brandon.
■24510▼aOn the Development of Tools for the Study of Colloidal Self-Assembly
■260 ▼a[Sl]▼bUniversity of Michigan▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a119 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 85-12, Section: B.
■500 ▼aAdvisor: Glotzer, Sharon.
■5021 ▼aThesis (Ph.D.)--University of Michigan, 2024.
■520 ▼aSelf-assembly is the process by which a material organizes itself without the need for external stimuli. This process spans a broad range of phenomena, from the crystallization of solids from atoms and molecules to the formation of micelles and cell membranes by amphiphilic molecules to the organization of colloidal crystals from nanoparticles. Understanding these phase transitions is essential to the intelligent development of new materials and structures and in particular for controlling the thermodynamic and kinetic pathways for assembly. Enabling such control will allow for currently impossible to access phases, precision in defect sizes and amounts and control of other knobs of phase design at various length scales.In Chapter 1, we describe the phenomena and challenges to detailed investigation of assembly pathways that this dissertation addresses.In Chapter 2, we outline two methods used throughout the dissertation.In Chapter 3, we present a six-step pipeline and Python package, dupin, we developed for detecting events from particle trajectories. The detection of transitions in particle-based (e.g. molecular) simulations is typically handled in an ad hoc way, while dupin provides a generalized detection scheme that maintains interpretability and permits comparison among disparate systems and pathways. Furthermore, by automating the detection of events associated with phase transformations, dupin enables self-assembly studies at larger length and time scales than previously feasible by removing the operator from the data-processing loop. We conclude Chapter 3 with example applications of dupin to the study of self-assembly.In Chapter 4, we outline and discuss a new order parameter that quantifies the symmetry of local particle environments. During the formation of crystals, particles organize themselves locally into motifs with new symmetries that may or may not be present in the fluid or the final crystal structure. The "Point Group Order Parameter", PGOP, identifies the point group symmetry of an individual particle's local environment. By identifying these local motifs and how they change over time, we can learn how a fluid chooses a particular kinetic pathway to follow. We compare PGOP to other commonly used local order parameters and, through examples, show how it provides a useful level of description not accessible to other order parameters. The chapter begins with an outline of the algorithm that is quickly followed by various demonstrations of PGOP's ability to detect and quantify local order in noisy crystalline systems with/without defects and even amorphous phases.In Chapter 5, we present another new order parameter we developed for studying phase transformations. This new order parameter consists of a group of functions that form a vector of continuous local coordination numbers, CNv , in a system of particles. The well-known local coordination number, CN, is defined for particle-based systems as the number of particles that are first nearest neighbors to a given particle. Consequently, CN takes on only discrete integer values, which can be problematic when used as a local order parameter due to fluctuations from thermal effects. CNv smooths CN into a continuous value - essentially a dimensionless local density - making it useful in self-assembly studies in which thermal noise and other forces can cause discontinuous changes in CN. To do this, CNv uses the area of facets in Voronoi tessellation polytopes to weigh neighbor contributions to a coordination shell. We provide a detailed description of CNv and demonstrate its usefulness in noisy systems and in combination with PGOP.In Chapter 6, we discuss our software development contributions to HOOMD-blue, our group's open source Python simulation toolkit, for its version 3 release. This release included a complete redesign of the application programming interface, various ways to extend molecular dynamics and Monte Carlo simulations of particle-based systems in Python and direct access to HOOMD-blue's internal data buffers. These advancements facilitated numerous new simulation protocols and methodologies while reducing the human capital necessary for the design of new simulation techniques.We conclude my dissertation in Chapter 7 with a summary of the preceding chapters and provide a forward-looking perspective regarding further work and the potential new applications of our work in the field of self-assembly.
■590 ▼aSchool code: 0127.
■650 4▼aChemical engineering
■650 4▼aApplied physics
■650 4▼aCondensed matter physics
■653 ▼aColloids
■653 ▼aSelf-assembly
■653 ▼aOrder parameters
■653 ▼aSoftware development
■653 ▼aBond orientational ordering
■653 ▼aChange point detection
■690 ▼a0542
■690 ▼a0215
■690 ▼a0611
■71020▼aUniversity of Michigan▼bChemical Engineering.
■7730 ▼tDissertations Abstracts International▼g85-12B.
■790 ▼a0127
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17162843▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


