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Spectroscopic and Electrochemical Characterization of Energy Capture and Storage Materials
Spectroscopic and Electrochemical Characterization of Energy Capture and Storage Materials
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202103115
- ISBN
- 9798315712718
- DDC
- 540
- 서명/저자
- Spectroscopic and Electrochemical Characterization of Energy Capture and Storage Materials
- 발행사항
- [Sl] : The University of North Carolina at Chapel Hill, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 252 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-11, Section: B.
- 주기사항
- Advisor: Dempsey, Jillian L.
- 학위논문주기
- Thesis (Ph.D.)--The University of North Carolina at Chapel Hill, 2025.
- 초록/해제
- 요약Quantum confined semiconductor nanocrystals (NCs), such as quantum dots and nanoplatelets, are promising materials for energy capture technologies because of their size-dependent optoelectronic properties that arise from confinement of charge carriers at sizes below the material's exciton Bohr radius. Because of their high surface-to-volume ratios, the NC surface plays a key role in their performance for numerous applications. Surface defects such as undercoordinated surface ions trap charge carriers, hindering NC optoelectronic properties. Although surface modification has been demonstrated to counteract surface defects, the limited understanding of ligand exchange mechanisms and lack of a molecular-level understanding of the NC surface obstructs the optimal performance of NCs.To tackle this conundrum, the work presented in this dissertation outlines efforts to elucidate reactivity at NC surfaces. Two projects focused on enhancing molecular-level understanding of the NC surface are discussed. First, the surface reactivity of oleate-capped PbS NCs with primary amines as non-native L-type ligands is assessed. This work resolves the mechanisms through which primary amines bind to the NC surface and displace native Z-type ligands and identifies the robust electronic structure of PbS NCs that persists through significant surface changes. Ligand binding motifs and thermochemistry at the NC surface are subsequently probed by quantifying the self-exchange of oleic acid ligands in PbS NCs. In a parallel project, electrochemical modulation of the energetics of hybridized states arising from nanoplatelets coupled with light in an optical cavity are investigated, highlighting the versatility of NCs for diverse applications.Coupled with energy capture technologies, redox-flow batteries (RFBs) are a promising alternative for storing large amounts of energy through electrolyte reservoirs. In a final project, the electrochemical properties of quinone and quinone derivatives are investigated as potential RFB electrolytes extracted from naturally occurring fungi. Their electrochemical and chemical reversibility were identified under neutral and buffered conditions, gauging the impact of different conditions in the stability of potential RFB electrolytes. The work described herein serves as a collection of characterization methods to develop design principles for improved energy capture and storage materials, paving the way to combine different systems for a sustainable energy economy.
- 일반주제명
- Chemistry
- 일반주제명
- Inorganic chemistry
- 일반주제명
- Materials science
- 키워드
- Electrochemistry
- 키워드
- Nanocrystals
- 키워드
- Semiconductors
- 키워드
- Spectroscopy
- 기타저자
- The University of North Carolina at Chapel Hill Chemistry
- 기본자료저록
- Dissertations Abstracts International. 86-11B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202103115
■006m o d
■007cr#unu||||||||
■020 ▼a9798315712718
■035 ▼a(MiAaPQ)AAI31937026
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a540
■1001 ▼aDones Lassalle, Christian Y.
■24510▼aSpectroscopic and Electrochemical Characterization of Energy Capture and Storage Materials
■260 ▼a[Sl]▼bThe University of North Carolina at Chapel Hill▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a252 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-11, Section: B.
■500 ▼aAdvisor: Dempsey, Jillian L.
■5021 ▼aThesis (Ph.D.)--The University of North Carolina at Chapel Hill, 2025.
■520 ▼aQuantum confined semiconductor nanocrystals (NCs), such as quantum dots and nanoplatelets, are promising materials for energy capture technologies because of their size-dependent optoelectronic properties that arise from confinement of charge carriers at sizes below the material's exciton Bohr radius. Because of their high surface-to-volume ratios, the NC surface plays a key role in their performance for numerous applications. Surface defects such as undercoordinated surface ions trap charge carriers, hindering NC optoelectronic properties. Although surface modification has been demonstrated to counteract surface defects, the limited understanding of ligand exchange mechanisms and lack of a molecular-level understanding of the NC surface obstructs the optimal performance of NCs.To tackle this conundrum, the work presented in this dissertation outlines efforts to elucidate reactivity at NC surfaces. Two projects focused on enhancing molecular-level understanding of the NC surface are discussed. First, the surface reactivity of oleate-capped PbS NCs with primary amines as non-native L-type ligands is assessed. This work resolves the mechanisms through which primary amines bind to the NC surface and displace native Z-type ligands and identifies the robust electronic structure of PbS NCs that persists through significant surface changes. Ligand binding motifs and thermochemistry at the NC surface are subsequently probed by quantifying the self-exchange of oleic acid ligands in PbS NCs. In a parallel project, electrochemical modulation of the energetics of hybridized states arising from nanoplatelets coupled with light in an optical cavity are investigated, highlighting the versatility of NCs for diverse applications.Coupled with energy capture technologies, redox-flow batteries (RFBs) are a promising alternative for storing large amounts of energy through electrolyte reservoirs. In a final project, the electrochemical properties of quinone and quinone derivatives are investigated as potential RFB electrolytes extracted from naturally occurring fungi. Their electrochemical and chemical reversibility were identified under neutral and buffered conditions, gauging the impact of different conditions in the stability of potential RFB electrolytes. The work described herein serves as a collection of characterization methods to develop design principles for improved energy capture and storage materials, paving the way to combine different systems for a sustainable energy economy.
■590 ▼aSchool code: 0153.
■650 4▼aChemistry
■650 4▼aInorganic chemistry
■650 4▼aMaterials science
■653 ▼aElectrochemistry
■653 ▼aExciton-polaritons
■653 ▼aNanocrystals
■653 ▼aRedox flow battery electrolytes
■653 ▼aSemiconductors
■653 ▼aSpectroscopy
■690 ▼a0485
■690 ▼a0488
■690 ▼a0794
■71020▼aThe University of North Carolina at Chapel Hill▼bChemistry.
■7730 ▼tDissertations Abstracts International▼g86-11B.
■790 ▼a0153
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17357008▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
