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

Baowei Zhang, Tingting Zhu, Mingyang Ou, Nelson Rowell, Hongsong Fan, Jiantao Han, Lei Tan, Martin T. Dove, Yang Ren, Xiaobing Zuo, Shuo Han (), Jianrong Zeng () and Kui Yu ()
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Baowei Zhang: Sichuan University
Tingting Zhu: Sichuan University
Mingyang Ou: Huazhong University of Science & Technology
Nelson Rowell: National Research Council of Canada
Hongsong Fan: Engineering Research Center in Biomaterials, Sichuan University
Jiantao Han: Huazhong University of Science & Technology
Lei Tan: Queen Mary University of London
Martin T. Dove: Queen Mary University of London
Yang Ren: Argonne National Laboratory
Xiaobing Zuo: Argonne National Laboratory
Shuo Han: Sichuan University
Jianrong Zeng: Chinese Academy of Sciences
Kui Yu: Sichuan University

Nature Communications, 2018, vol. 9, issue 1, 1-10

Abstract: Abstract 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. The findings on structural isomerism should stimulate attention toward advanced design and synthesis of functional nanomaterials enabled by structural transformations.

Date: 2018
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DOI: 10.1038/s41467-018-04842-0

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