典型文献
How different are the surfaces of semiconductor Ag2Se quantum dots with various sizes?
文献摘要:
The surface of nanocrystals plays a dominant role in many of their physical and chemical properties.However,controllability and tunability of nanocrystal surfaces remain unsolved.Herein,we report that the surface chemistry of nanocrystals,such as near-infrared Ag2Se quantum dots(QDs),is size-dependent and composition-tunable.The Ag2Se QDs tend to form a stable metal complex on the surface to minimize the surface energy,and therefore the surface chemistry can be varied with particle size.Meanwhile,changes in surface inorganic composition lead to reorganization of the surface ligands,and the surface chemistry also varies with composition.Therefore,the surface chemistry of Ag2Se QDs,responsible for the photoluminescence(PL)quantum yield and photostability,can be tuned by changing their size or composition.Accordingly,we demonstrate that the PL intensity of the Ag2Se QDs can be tuned reversely by adjusting the degree of surface Ag+enrichment via light irradiation or the addition of AgNO3.This work provides insight into the control of QD surface for desired PL properties.
文献关键词:
中图分类号:
作者姓名:
Jing-Ya Zhao;Zhi-Gang Wang;Hui Hu;Zhi-Ling Zhang;Bo Tang;Meng-Yao Luo;Ling-Ling Yang;Baoshan Wang;Dai-Wen Pang
作者机构:
College of Chemistry and Molecular Sciences,State Key Laboratory of Virology,and Wuhan Institute of Biotechnology,Wuhan University,Wuhan 430072,China;State Key Laboratory of Medicinal Chemical Biology,Tianjin Key Laboratory of Biosensing and Molecular Recognition,Research Center for Analytical Sciences,and College of Chemistry,Nankai University,Tianjin 300071,China
文献出处:
引用格式:
[1]Jing-Ya Zhao;Zhi-Gang Wang;Hui Hu;Zhi-Ling Zhang;Bo Tang;Meng-Yao Luo;Ling-Ling Yang;Baoshan Wang;Dai-Wen Pang-.How different are the surfaces of semiconductor Ag2Se quantum dots with various sizes?)[J].科学通报(英文版),2022(06):619-625
A类:
Ag+enrichment
B类:
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AB值:
0.525488
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