CAS OpenIR  > 中科院上海应用物理研究所2011-2018年
Probing intermediates of the induction period prior to nucleation and growth of semiconductor quantum dots
Liu, MY; Wang, K; Wang, LX; Han, S; Fan, HS; Rowell, N; Ripmeester, JA; Renoud, R; Bian, FG; Zeng, JR; Yu, K
2017
Source PublicationNATURE COMMUNICATIONS
ISSN2041-1723
Volume8Issue:-Pages:-
Subtype期刊论文
AbstractLittle is known about the induction period before the nucleation and growth of colloidal semiconductor quantum dots. Here, we introduce an approach that allows us to probe intermediates present in the induction period. We show that this induction period itself exhibits distinct stages with the evolution of the intermediates, first without and then with the formation of covalent bonds between metal cations and chalcogenide anions. The intermediates are optically invisible in toluene, while the covalent-bonded intermediates become visible as magic-size clusters when a primary amine is added. Such evolution of magic-size clusters provides indirect but compelling evidence for the presence of the intermediates in the induction period and supports the multi-step nucleation model. Our study reveals that magic-size clusters could be readily engineered in a single-size form, and suggests that the existence of the intermediates during the growth of conventional quantum dots results in low product yield.
KeywordMagic-sized Cdse Strong Bandgap Photoluminescence Small-angle Scattering Low-temperature Cdte Nanocrystals Mass-spectrometry Calcium-phosphate Clusters Nanoparticles Nanoclusters
DOI10.1038/ncomms15467
WOS KeywordMAGIC-SIZED CDSE ; STRONG BANDGAP PHOTOLUMINESCENCE ; SMALL-ANGLE SCATTERING ; LOW-TEMPERATURE ; CDTE NANOCRYSTALS ; MASS-SPECTROMETRY ; CALCIUM-PHOSPHATE ; CLUSTERS ; NANOPARTICLES ; NANOCLUSTERS
Indexed BySCI
Language英语
WOS IDWOS:000402745200001
Citation statistics
Cited Times:18[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/28782
Collection中科院上海应用物理研究所2011-2018年
Recommended Citation
GB/T 7714
Liu, MY,Wang, K,Wang, LX,et al. Probing intermediates of the induction period prior to nucleation and growth of semiconductor quantum dots[J]. NATURE COMMUNICATIONS,2017,8(-):-.
APA Liu, MY.,Wang, K.,Wang, LX.,Han, S.,Fan, HS.,...&Yu, K.(2017).Probing intermediates of the induction period prior to nucleation and growth of semiconductor quantum dots.NATURE COMMUNICATIONS,8(-),-.
MLA Liu, MY,et al."Probing intermediates of the induction period prior to nucleation and growth of semiconductor quantum dots".NATURE COMMUNICATIONS 8.-(2017):-.
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