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Multiphase Chemical Kinetics in Aqueous Microdroplets
Multiphase Chemical Kinetics in Aqueous Microdroplets
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211152734
- ISBN
- 9798384455349
- DDC
- 541
- 서명/저자
- Multiphase Chemical Kinetics in Aqueous Microdroplets
- 발행사항
- [Sl] : University of California, Berkeley, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 186 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-03, Section: B.
- 주기사항
- Advisor: Wilson, Kevin R.;Saykally, Richard J.
- 학위논문주기
- Thesis (Ph.D.)--University of California, Berkeley, 2024.
- 초록/해제
- 요약Multiphase chemistry occurs when reactivity involves two or more distinct phases. Chemical transformations of this kind are ubiquitous in all domains of science, with particular relevance to environmental and biological chemistry. Aerosols, including cloud droplets, sea-spray, smoke, and dust are prime examples of gas-liquid and gas-solid systems that undergo heterogeneous chemical changes while persisting in the atmosphere. A fundamental understanding of how multiphase reactions proceed is critical, then, to the study of our environment and the causal networks between anthropogenic activity, global ecosystems, and atmospheric composition. Moreover, a mechanistic perspective of reactivity in gas-liquid or gas-solid systems provides a useful framework for the study of multiphase interactions more generally, even informing on similar mechanics encountered in liquid-liquid and solid-liquid systems.In this work, experiment and theory are brought together to develop a kinetic framework of multiphase reactivity in aqueous microdroplets with particular focus on the role of the air-water interface. The experiments presented investigate the ozone-oxidation of aqueous sodium iodide contained in levitated microdroplets. This system is not only relevant to oxidation reactions in the environment, but also a compelling platform for studying mass-transfer across the air-water interface due to its unique reactive properties. As explored in Chapters 2 and 3, both I- and O3 possess a unique affinity for the air-water interface relative to their bulk phases, which directly affects the chemical kinetics at the microdroplet surface. This effect is studied by measuring microdroplet-oxidation kinetics while varying the solution pH and the concentration of both reactants. Experiments in Chapter 4 perturb this surface chemistry by the addition of surfactant to the microdroplet solution-effectively suppressing the surface reaction and producing a kinetic signature consistent with a diffusion limited reaction rate in the bulk phase. Insights from the specific systems in Chapters 2-4 provide the basis for a general framework of mass-transport and chemical reactivity in microdroplets which is developed in Chapter 5. This work aims to provide a route to analyzing an array of multiphase experiments from a critical lens by disentangling the underlying physical and chemical phenomena.
- 일반주제명
- Physical chemistry
- 일반주제명
- Chemistry
- 일반주제명
- Analytical chemistry
- 일반주제명
- Atmospheric chemistry
- 키워드
- Aerosols
- 키워드
- Interfaces
- 키워드
- Kinetics
- 기타저자
- University of California, Berkeley Chemistry
- 기본자료저록
- Dissertations Abstracts International. 86-03B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211152734
■006m o d
■007cr#unu||||||||
■020 ▼a9798384455349
■035 ▼a(MiAaPQ)AAI31491161
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a541
■1001 ▼aProphet, Alexander M.
■24510▼aMultiphase Chemical Kinetics in Aqueous Microdroplets
■260 ▼a[Sl]▼bUniversity of California, Berkeley▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a186 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-03, Section: B.
■500 ▼aAdvisor: Wilson, Kevin R.;Saykally, Richard J.
■5021 ▼aThesis (Ph.D.)--University of California, Berkeley, 2024.
■520 ▼aMultiphase chemistry occurs when reactivity involves two or more distinct phases. Chemical transformations of this kind are ubiquitous in all domains of science, with particular relevance to environmental and biological chemistry. Aerosols, including cloud droplets, sea-spray, smoke, and dust are prime examples of gas-liquid and gas-solid systems that undergo heterogeneous chemical changes while persisting in the atmosphere. A fundamental understanding of how multiphase reactions proceed is critical, then, to the study of our environment and the causal networks between anthropogenic activity, global ecosystems, and atmospheric composition. Moreover, a mechanistic perspective of reactivity in gas-liquid or gas-solid systems provides a useful framework for the study of multiphase interactions more generally, even informing on similar mechanics encountered in liquid-liquid and solid-liquid systems.In this work, experiment and theory are brought together to develop a kinetic framework of multiphase reactivity in aqueous microdroplets with particular focus on the role of the air-water interface. The experiments presented investigate the ozone-oxidation of aqueous sodium iodide contained in levitated microdroplets. This system is not only relevant to oxidation reactions in the environment, but also a compelling platform for studying mass-transfer across the air-water interface due to its unique reactive properties. As explored in Chapters 2 and 3, both I- and O3 possess a unique affinity for the air-water interface relative to their bulk phases, which directly affects the chemical kinetics at the microdroplet surface. This effect is studied by measuring microdroplet-oxidation kinetics while varying the solution pH and the concentration of both reactants. Experiments in Chapter 4 perturb this surface chemistry by the addition of surfactant to the microdroplet solution-effectively suppressing the surface reaction and producing a kinetic signature consistent with a diffusion limited reaction rate in the bulk phase. Insights from the specific systems in Chapters 2-4 provide the basis for a general framework of mass-transport and chemical reactivity in microdroplets which is developed in Chapter 5. This work aims to provide a route to analyzing an array of multiphase experiments from a critical lens by disentangling the underlying physical and chemical phenomena.
■590 ▼aSchool code: 0028.
■650 4▼aPhysical chemistry
■650 4▼aChemistry
■650 4▼aAnalytical chemistry
■650 4▼aAtmospheric chemistry
■653 ▼aAerosols
■653 ▼aChemical modeling
■653 ▼aInterfaces
■653 ▼aKinetics
■653 ▼aMultiphase chemistry
■653 ▼aSurface chemistry
■690 ▼a0494
■690 ▼a0485
■690 ▼a0486
■690 ▼a0371
■71020▼aUniversity of California, Berkeley▼bChemistry.
■7730 ▼tDissertations Abstracts International▼g86-03B.
■790 ▼a0028
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17163635▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
