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Detecting electronic structure evolution of semiconductor nanocrystals by magnetic circular dichroism spectroscopy

文献类型：期刊论文

作者Gao, Xiaoqing1,2; Zhang, Xiuwen1; Yang, Xuekang2; Zhao, Luyang3; Han, Bing4; Alanagh, Hamideh Rezvani2; Tang, Zhiyong2
刊名NANOSCALE
出版日期2019-11-07
卷号11期号:41页码:19380-19386
ISSN号2040-3364
DOI10.1039/c9nr03630j
英文摘要The evolution of electronic states of nanocrystals under shape variation is hardly detected by conventional optical and electronic instruments due to the condensed electronic levels of nanocrystals. Herein, we demonstrate that magnetic circular dichroism (MCD) spectroscopy is a high-resolution method to monitor this delicate progress on account of the sensitive Zeeman response to electronic states. In particular, the MCD intensity of the first excitonic transition exponentially decreases with the shape changing from quantum dots to quantum rods owing to the increased density of valence p(z) state with elongation in the z direction, which contributes much less to MCD intensity compared with p(+/-). This work provides a simple but effective strategy for understanding the electronic state evolution in various semiconductor nanomaterials.
WOS关键词QUANTUM RODS ; EMISSION ; STATES
资助项目National Key Basic Research Program of China[2014CB931801] ; National Key Basic Research Program of China[2016YFA0200700] ; National Key Basic Research Program of China[2016YFB0700700] ; National Natural Science Foundation of China[21805188] ; National Natural Science Foundation of China[21721002] ; National Natural Science Foundation of China[21475029] ; National Natural Science Foundation of China[11774239] ; National Natural Science Foundation of China[61827815] ; Frontier Science Key Project of Chinese Academy of Sciences[QYZDJ-SSW-SLH038] ; K.C.Wong Education Foundation ; Shenzhen Science and Technology Innovation Commission[JCYJ20170818093035338] ; Shenzhen Science and Technology Innovation Commission[JCYJ20170412110137562] ; Shenzhen Science and Technology Innovation Commission[ZDSYS201707271554071] ; CAS Key Laboratory of Nanosystem and Hierarchical Fabrication[NHF18JJ102]
WOS研究方向Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种英语
WOS记录号WOS:000498821300033
出版者ROYAL SOC CHEMISTRY
资助机构National Key Basic Research Program of China ; National Natural Science Foundation of China ; Frontier Science Key Project of Chinese Academy of Sciences ; K.C.Wong Education Foundation ; Shenzhen Science and Technology Innovation Commission ; CAS Key Laboratory of Nanosystem and Hierarchical Fabrication
源URL[http://ir.ipe.ac.cn/handle/122111/38429]  
专题中国科学院过程工程研究所
通讯作者Tang, Zhiyong
作者单位1.Shenzhen Univ, Shenzhen Key Lab Flexible Memory Mat & Devices, Coll Phys & Optoelect Engn, Shenzhen 518060, Guangdong, Peoples R China
2.Natl Ctr Nanosci & Technol, CAS Key Lab Nanosyst & Hierarch Fabricat, CAS Ctr Excellence Nanosci, Beijing 100190, Peoples R China
3.Chinese Acad Sci, State Key Lab Biochem Engn, Inst Proc Engn, Beijing 100190, Peoples R China
4.North China Power Elect Univ, Beijing 102206, Peoples R China
推荐引用方式
GB/T 7714		 Gao, Xiaoqing,Zhang, Xiuwen,Yang, Xuekang,et al. Detecting electronic structure evolution of semiconductor nanocrystals by magnetic circular dichroism spectroscopy[J]. NANOSCALE,2019,11(41):19380-19386.
APA Gao, Xiaoqing.,Zhang, Xiuwen.,Yang, Xuekang.,Zhao, Luyang.,Han, Bing.,...&Tang, Zhiyong.(2019).Detecting electronic structure evolution of semiconductor nanocrystals by magnetic circular dichroism spectroscopy.NANOSCALE,11(41),19380-19386.
MLA Gao, Xiaoqing,et al."Detecting electronic structure evolution of semiconductor nanocrystals by magnetic circular dichroism spectroscopy".NANOSCALE 11.41(2019):19380-19386.

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来源：过程工程研究所

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