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

Journal Article · · Nature Communications
 [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)

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.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Natural Science Foundation of China (NSFC); Fundamental Research Funds for the Central Universities; USDOE
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1466370
Journal Information:
Nature Communications, Vol. 9, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 70 works
Citation information provided by
Web of Science

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Structure Distortion Induced Monoclinic Nickel Hexacyanoferrate as High-Performance Cathode for Na-Ion Batteries journal December 2018
Formation of colloidal alloy semiconductor CdTeSe magic-size clusters at room temperature journal April 2019
Carboxylic acid stimulated silver shell isomerism in a triple core–shell Ag 84 nanocluster journal January 2019
X-ray total scattering study of magic-size clusters and quantum dots of cadmium sulphide journal January 2019
The solvent-induced isomerization of silver thiolate clusters with symmetry transformation journal January 2020
Chemically reversible isomerization of inorganic clusters journal February 2019
Synthesis and Configurational Character Study of Novel Structural Isomers Based on Pyrene–Imidazole journal June 2019
Formation of colloidal alloy semiconductor CdTeSe magic-size clusters at room temperature journal April 2019