CAS OpenIR
Distinct Excitonic Circular Dichroism between Wurtzite and Zincblende CdSe Nanoplatelets
Gao, XQ; Zhang, XW; Zhao, LY; Huang, P; Han, B; Lv, JW; Qiu, XY; Wei, SH; Tang, ZY; Gao, Xiaoqing; Zhang, Xiuwen; Zhao, Luyang; Huang, Pu; Han, Bing; Lv, Jiawei; Qiu, Xueying; Wei, Su-Huai; Tang, Zhiyong
2018
Source PublicationNANO LETTERS
ISSN1530-6984
Volume18Issue:11Pages:6665
Abstract

Nanocrystals (NCs) with identical components and sizes but different crystal structures could not be distinguished by conventional absorption and emission spectra. Herein, we find that circular dichroism (CD) spectroscopy can easily distinguish the CdSe nano platelets (NPLs) with different crystal structures of wurtzite (WZ) and zincblende (ZB) with the help of chiral L- or D-cysteine ligands. In particular, the CD signs of the first excitonic transitions in WZ and ZB NPLs capped by the same chiral c-ysteine are opposite. Theoretic calculation supports the viewpoint of different crystal structures and surfaces arrangements between WZ and ZB NPLs contributing to this significant phenomenon. The CD peaks appearing at the first excitonic transition band of WZ or ZB CdSe NPLs are clearly assigned to the different transition polarizations along 4p((x,y,z),Se) -> 5s(Cd) or 4p((x,y),Se) -> 5s(Cd). This work not only provides a deep insight into the origin of the optical activity inside chiral semiconductor nanomaterials but also proposes the design principle of chiral semiconductor nanocrystals with high optic activity.

KeywordCircular Dichroism Spectrum Quantum Dots Optical Activity 2-photon Absorption Cdse Nanoplatelets Amino-acids Wurtzite Chirality Zincblende Nanoparticles Excitonic Transition Nanocrystals Biomolecules Recognition Dependence Emission
SubtypeArticle
DOI10.1021/acs.nanolett.8b01001
Language英语
WOS IDWOS:000451102100003
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/26784
Collection中国科学院过程工程研究所
Recommended Citation
GB/T 7714
Gao, XQ,Zhang, XW,Zhao, LY,et al. Distinct Excitonic Circular Dichroism between Wurtzite and Zincblende CdSe Nanoplatelets[J]. NANO LETTERS,2018,18(11):6665.
APA Gao, XQ.,Zhang, XW.,Zhao, LY.,Huang, P.,Han, B.,...&Tang, Zhiyong.(2018).Distinct Excitonic Circular Dichroism between Wurtzite and Zincblende CdSe Nanoplatelets.NANO LETTERS,18(11),6665.
MLA Gao, XQ,et al."Distinct Excitonic Circular Dichroism between Wurtzite and Zincblende CdSe Nanoplatelets".NANO LETTERS 18.11(2018):6665.
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