skip to main content

DOE PAGESDOE PAGES

Title: Thermally-induced reversible structural isomerization in colloidal semiconductor CdS magic-size clusters

Structural isomerism of colloidal semiconductor nanocrystals has been largely unexplored. Here, we report one pair of structural isomers identified for colloidal nanocrystals which exhibit thermally-induced reversible transformations behaving like molecular isomerization. The two isomers are CdS magic-size clusters with sharp absorption peaks at 311 and 322 nm. They have identical cluster masses, but slightly different structures. Furthermore, their interconversions follow first-order unimolecular reaction kinetics. We anticipate that such isomeric kinetics are applicable to a variety of small-size functional nanomaterials, and that the methodology developed for our kinetic study will be helpful to investigate and exploit solid-solid transformations in other semiconductor nanocrystals. Furthermore, the findings on structural isomerism should stimulate attention toward advanced design and synthesis of functional nanomaterials enabled by structural transformations.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [1] ;  [2] ;  [4] ;  [5] ;  [6] ;  [6] ;  [1] ;  [7] ;  [1]
  1. Sichuan Univ., Chengdu (People's Republic of China)
  2. Huazhong Univ. of Science & Technology, Wuhan (People's Republic of China)
  3. National Research Council of Canada, Ottawa, ON (Canada)
  4. Queen Mary Univ. of London, London (United Kingdom)
  5. Queen Mary Univ. of London, London (United Kingdom); Sichuan Univ., Chengdu (People's Republic of China)
  6. Argonne National Lab. (ANL), Lemont, IL (United States)
  7. Chinese Academy of Sciences, Shanghai (China)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
National Natural Science Foundation of China (NNSFC); Fundamental Research Funds for the Central Universities; USDOE
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS
OSTI Identifier:
1466370