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
发表期刊NATURE COMMUNICATIONS
ISSN2041-1723
卷号8期号:-页码:-
文章类型期刊论文
摘要Little 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.
关键词Magic-sized Cdse Strong Bandgap Photoluminescence Small-angle Scattering Low-temperature Cdte Nanocrystals Mass-spectrometry Calcium-phosphate Clusters Nanoparticles Nanoclusters
DOI10.1038/ncomms15467
关键词[WOS]MAGIC-SIZED CDSE ; STRONG BANDGAP PHOTOLUMINESCENCE ; SMALL-ANGLE SCATTERING ; LOW-TEMPERATURE ; CDTE NANOCRYSTALS ; MASS-SPECTROMETRY ; CALCIUM-PHOSPHATE ; CLUSTERS ; NANOPARTICLES ; NANOCLUSTERS
收录类别SCI
语种英语
WOS记录号WOS:000402745200001
引用统计
被引频次:12[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/28782
专题中科院上海应用物理研究所2011-2018年
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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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