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Why Do Colloidal Wurtzite Semiconductor Nanoplatelets Have an Atomically Uniform Thickness of Eight Monolayers?
Pang, Yingping; Zhang, Minyi; Chen, Dechao; Chen, Wei; Wang, Fei; Anwar, Shaghraf Javaid; Saunders, Martin; Rowles, Matthew R; Liu, Lihong; Liu, Shaomin; Sitt, Amit; Li, Chunsen; Jia, Guohua.
Afiliação
  • Pang Y; Curtin Institute of Functional Molecules and Interfaces, School of Molecular and Life Sciences , Curtin University , Bentley , WA 6102 , Australia.
  • Zhang M; State Key Laboratory of Structural Chemistry , Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou , Fujian 350002 , China.
  • Chen D; Curtin Institute of Functional Molecules and Interfaces, School of Molecular and Life Sciences , Curtin University , Bentley , WA 6102 , Australia.
  • Chen W; Curtin Institute of Functional Molecules and Interfaces, School of Molecular and Life Sciences , Curtin University , Bentley , WA 6102 , Australia.
  • Wang F; Curtin Institute of Functional Molecules and Interfaces, School of Molecular and Life Sciences , Curtin University , Bentley , WA 6102 , Australia.
  • Anwar SJ; Curtin Institute of Functional Molecules and Interfaces, School of Molecular and Life Sciences , Curtin University , Bentley , WA 6102 , Australia.
  • Saunders M; Centre for Microscopy, Characterization and Analysis (CMCA) and School of Molecular Sciences , The University of Western Australia , Crawley , WA 6009 , Australia.
  • Rowles MR; Department of Physics and Astronomy , Curtin University , Bentley , WA 6102 , Australia.
  • Liu L; WA School of Mines: Minerals, Energy and Chemical Engineering , Curtin University , Bentley , WA 6102 , Australia.
  • Liu S; WA School of Mines: Minerals, Energy and Chemical Engineering , Curtin University , Bentley , WA 6102 , Australia.
  • Sitt A; Raymond and Beverly Sackler Faculty of Exact Sciences, School of Chemistry , Tel Aviv University , Tel Aviv 6997801 , Israel.
  • Li C; State Key Laboratory of Structural Chemistry , Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou , Fujian 350002 , China.
  • Jia G; Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry , Xiamen , Fujian 361005 , China.
J Phys Chem Lett ; 10(12): 3465-3471, 2019 Jun 20.
Artigo em Inglês | MEDLINE | ID: mdl-31184156
ABSTRACT
Herein we employed a first-principles method based on density functional theory to investigate the surface energy and growth kinetics of wurtzite nanoplatelets to elucidate why nanoplatelets exhibit a uniform thickness of eight monolayers. We synthesized a series of wurtzite nanoplatelets (ZnSe, ZnS, ZnTe, and CdSe) with an atomically uniform thickness of eight monolayers. As a representative example, the growth mechanism of 1.39 nm thick (eight monolayers) wurtzite ZnSe nanoplatelets was studied to substantiate the proposed growth kinetics. The results show that the growth of the seventh and eighth layers along the [112̅0] direction of 0.99 nm (six monolayers) ZnSe magic-size nanoclusters is accessible, whereas the growth of the ninth layer is unlikely to occur because the formation energy is large. This work not only gives insights into the synthesis of atomically uniform thick wurtzite semiconductor nanoplatelets but also opens up new avenues to their applications in light-emitting diodes, catalysis, detectors, and lasers.

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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Idioma: Inglês Revista: J Phys Chem Lett Ano de publicação: 2019 Tipo de documento: Artigo País de afiliação: Austrália