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Pristine Gold-Tape Exfoliation of Transition Metal Dichalcogenide Monolayers
Pristine Gold-Tape Exfoliation of Transition Metal Dichalcogenide Monolayers
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105201
- ISBN
- 9798297617780
- DDC
- 540
- 서명/저자
- Pristine Gold-Tape Exfoliation of Transition Metal Dichalcogenide Monolayers
- 발행사항
- [Sl] : Columbia University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 142 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-04, Section: B.
- 주기사항
- Advisor: Zhu, Xiaoyang.
- 학위논문주기
- Thesis (Ph.D.)--Columbia University, 2025.
- 초록/해제
- 요약Transition metal dichalcogenides (TMD) monolayers have proven to be a premier class of two-dimensional semiconductor due to their chemical simplicity, suitable carrier mobilities, and desirable band gaps. However, popular fabrication methods fail to produce TMD monolayers with both suitable sizes and quality. The metal-assisted "gold-tape" method enables the deterministic exfoliation of macroscopic TMD monolayers from bulk single crystals, overcoming the size limitations of the widely used "Scotch-tape" method. However, concerns regarding the quality of gold-exfoliated TMD monolayers have limited the technique's adoption. This thesis discusses the quality and cleanliness of gold-tape exfoliated TMD monolayers from furnace to device. A substantial population of free charges is observed for photoexcited TMD monolayers, unless exfoliated from state-of-the-art flux grown crystals, highlighting the importance of parent crystal quality. Furthermore, the discovery of a previously unknown irreversibly adsorbed polyvinylpyrrolidone (PVP) residue layer is chronicled, and a critical Ar/O2 reactive ion etch (RIE) step is introduced to eliminate it. Gold-tape exfoliation is shown to produce pristine, millimeter-scale, TMD monolayers which exhibit defect density, charge carrier mobility, and excitonic properties intrinsic to the parent crystal. Finally, post-process patterning and stacking are explored.
- 일반주제명
- Chemistry
- 일반주제명
- Materials science
- 일반주제명
- Engineering
- 키워드
- Monolayers
- 기타저자
- Columbia University Chemical Physics
- 기본자료저록
- Dissertations Abstracts International. 87-04B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202105201
■006m o d
■007cr#unu||||||||
■020 ▼a9798297617780
■035 ▼a(MiAaPQ)AAI32244896
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a540
■1001 ▼aOlsen, Nicholas Michael.
■24510▼aPristine Gold-Tape Exfoliation of Transition Metal Dichalcogenide Monolayers
■260 ▼a[Sl]▼bColumbia University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a142 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-04, Section: B.
■500 ▼aAdvisor: Zhu, Xiaoyang.
■5021 ▼aThesis (Ph.D.)--Columbia University, 2025.
■520 ▼aTransition metal dichalcogenides (TMD) monolayers have proven to be a premier class of two-dimensional semiconductor due to their chemical simplicity, suitable carrier mobilities, and desirable band gaps. However, popular fabrication methods fail to produce TMD monolayers with both suitable sizes and quality. The metal-assisted "gold-tape" method enables the deterministic exfoliation of macroscopic TMD monolayers from bulk single crystals, overcoming the size limitations of the widely used "Scotch-tape" method. However, concerns regarding the quality of gold-exfoliated TMD monolayers have limited the technique's adoption. This thesis discusses the quality and cleanliness of gold-tape exfoliated TMD monolayers from furnace to device. A substantial population of free charges is observed for photoexcited TMD monolayers, unless exfoliated from state-of-the-art flux grown crystals, highlighting the importance of parent crystal quality. Furthermore, the discovery of a previously unknown irreversibly adsorbed polyvinylpyrrolidone (PVP) residue layer is chronicled, and a critical Ar/O2 reactive ion etch (RIE) step is introduced to eliminate it. Gold-tape exfoliation is shown to produce pristine, millimeter-scale, TMD monolayers which exhibit defect density, charge carrier mobility, and excitonic properties intrinsic to the parent crystal. Finally, post-process patterning and stacking are explored.
■590 ▼aSchool code: 0054.
■650 4▼aChemistry
■650 4▼aMaterials science
■650 4▼aEngineering
■653 ▼aTransition metal dichalcogenides
■653 ▼aMonolayers
■653 ▼aPolyvinylpyrrolidone
■653 ▼aGold-tape exfoliation
■690 ▼a0485
■690 ▼a0794
■690 ▼a0537
■71020▼aColumbia University▼bChemical Physics.
■7730 ▼tDissertations Abstracts International▼g87-04B.
■790 ▼a0054
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359704▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
