Direct Observation of Off-Stoichiometry-Induced Phase Transformation of 2D CdSe Quantum Nanosheets
DC Field | Value | Language |
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dc.contributor.author | Ma, Hyeonjong | - |
dc.contributor.author | Kim, Dongjun | - |
dc.contributor.author | Park, Soo Ik | - |
dc.contributor.author | Choi, Back Kyu | - |
dc.contributor.author | Park, Gisang | - |
dc.contributor.author | Baek, Hayeon | - |
dc.contributor.author | Lee, Hyocheol | - |
dc.contributor.author | Kim, Hyeongseoung | - |
dc.contributor.author | Yu, Jong-Sung | - |
dc.contributor.author | Lee, Won Chul | - |
dc.contributor.author | Park, Jungwon | - |
dc.contributor.author | Yang, Jiwoong | - |
dc.date.accessioned | 2023-02-28T01:33:53Z | - |
dc.date.available | 2023-02-28T01:33:53Z | - |
dc.date.issued | 2023-03 | - |
dc.identifier.issn | 2198-3844 | - |
dc.identifier.issn | 2198-3844 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/111595 | - |
dc.description.abstract | Crystal structures determine material properties, suggesting that crystal phase transformations have the potential for application in a variety of systems and devices. Phase transitions are more likely to occur in smaller crystals; however, in quantum-sized semiconductor nanocrystals, the microscopic mechanisms by which phase transitions occur are not well understood. Herein, the phase transformation of 2D CdSe quantum nanosheets caused by off-stoichiometry is revealed, and the progress of the transformation is directly observed by in situ transmission electron microscopy. The initial hexagonal wurtzite-CdSe nanosheets with atomically uniform thickness are transformed into cubic zinc blende-CdSe nanosheets. A combined experimental and theoretical study reveals that electron-beam irradiation can change the stoichiometry of the nanosheets, thereby triggering phase transformation. The loss of Se atoms induces the reconstruction of surface atoms, driving the transformation from wurtzite-CdSe(112 over bar $\bar{2}$0) to zinc blende-CdSe(001) 2D nanocrystals. Furthermore, during the phase transformation, unconventional dynamic phenomena occur, including domain separation. This study contributes to the fundamental understanding of the phase transformations in 2D quantum-sized semiconductor nanocrystals. | - |
dc.format.extent | 10 | - |
dc.language | 영어 | - |
dc.language.iso | ENG | - |
dc.publisher | Wiley-VCH Verlag | - |
dc.title | Direct Observation of Off-Stoichiometry-Induced Phase Transformation of 2D CdSe Quantum Nanosheets | - |
dc.type | Article | - |
dc.publisher.location | 미국 | - |
dc.identifier.doi | 10.1002/advs.202205690 | - |
dc.identifier.scopusid | 2-s2.0-85146334222 | - |
dc.identifier.wosid | 000915137400001 | - |
dc.identifier.bibliographicCitation | Advanced Science, v.10, no.7, pp 1 - 10 | - |
dc.citation.title | Advanced Science | - |
dc.citation.volume | 10 | - |
dc.citation.number | 7 | - |
dc.citation.startPage | 1 | - |
dc.citation.endPage | 10 | - |
dc.type.docType | Article | - |
dc.description.isOpenAccess | Y | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Science & Technology - Other Topics | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Nanoscience & Nanotechnology | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.subject.keywordPlus | TRANSMISSION ELECTRON-MICROSCOPY | - |
dc.subject.keywordPlus | SEMICONDUCTOR NANOCRYSTALS | - |
dc.subject.keywordPlus | TRANSITION | - |
dc.subject.keywordPlus | GROWTH | - |
dc.subject.keywordPlus | SIZE | - |
dc.subject.keywordPlus | SUPPRESSION | - |
dc.subject.keywordPlus | NONVOLATILE | - |
dc.subject.keywordPlus | WURTZITE | - |
dc.subject.keywordPlus | DOTS | - |
dc.subject.keywordAuthor | in situ transmission electron microscopy | - |
dc.subject.keywordAuthor | phase transformation | - |
dc.subject.keywordAuthor | quantum nanosheets | - |
dc.subject.keywordAuthor | stoichiometry | - |
dc.subject.keywordAuthor | two-dimensional nanocrystals | - |
dc.identifier.url | https://onlinelibrary.wiley.com/doi/10.1002/advs.202205690 | - |
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