Detecting electronic structure evolution of semiconductor nanocrystals by magnetic circular dichroism spectroscopy
Source abstract
Abstract
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 pz 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.
Source: openalex_inverted_index · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films · ZnO doping and properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Shenzhen Key Laboratory of Flexible Memory Materials and Devices
College of Physics and Optoelectronic Engineering
Shenzhen University
Guangdong 518060
People's Republic of China
CAS Key Laboratory of Nanosystem and Hierarchical Fabrication
CAS Center for Excellence in Nanoscience
National Center for Nanoscience and Technology
Beijing 100190
State Key Laboratory of Biochemical Engineering
Institute of Process Engineering
Chinese Academy of Sciences
Chinese Academy of Science
North China Power Electric University
Beijing 102206
Funding
National Basic Research Program of China · National Natural Science Foundation of China · Chinese Academy of Sciences · Shenzhen Science and Technology Innovation Commission
References (38)
Show source-provided references
1. Alivisatos · Science · 1996 · 271 · 93310.1126/science.271.5251.933 ↗
2. Hu · Science · 2001 · 292 · 206010.1126/science.1060810 ↗
3. Ott · Phys. Rev. Lett. · 2014 · 113 · 15680310.1103/PhysRevLett.113.156803 ↗
4. Scott · Nat. Nanotechnol. · 2017 · 12 · 115510.1038/nnano.2017.177 ↗
5. Wang · Nature · 2009 · 459 · 68610.1038/nature08072 ↗
6. Li · Nano Lett. · 2003 · 3 · 135710.1021/nl034488o ↗
7. Zhao · Nano Lett. · 2007 · 7 · 327410.1021/nl0713070 ↗
8. Peng · Nature · 2000 · 404 · 5910.1038/35003535 ↗
9. Gao · J. Am. Chem. Soc. · 2017 · 139 · 873410.1021/jacs.7b04224 ↗
10. Katz · Phys. Rev. Lett. · 2002 · 89 · 08680110.1103/PhysRevLett.89.086801 ↗
11. Hu · J. Phys. Chem. B · 2002 · 106 · 244710.1021/jp013204q ↗
12. Li · Nano Lett. · 2002 · 3 · 10110.1021/nl020231z ↗
13. Li · Nano Lett. · 2002 · 2 · 55710.1021/nl0255146 ↗
14. Zhu · J. Am. Chem. Soc. · 2012 · 134 · 1128910.1021/ja304724u ↗
15. Kan · Nat. Mater. · 2003 · 2 · 15510.1038/nmat830 ↗
16. Rothenberg · Nano Lett. · 2005 · 5 · 158110.1021/nl051007n ↗
17. Fu · Nano Lett. · 2006 · 7 · 17910.1021/nl0626434 ↗
18. Hadar · Nano Lett. · 2017 · 17 · 252410.1021/acs.nanolett.7b00254 ↗
19. Wu · Adv. Mater. · 2016 · 28 · 590710.1002/adma.201601261 ↗
20. Ma · Chem. Rev. · 2017 · 117 · 804110.1021/acs.chemrev.6b00755 ↗
21. Hao · Adv. Mater. · 2019 · e180207510.1002/adma.201802075 ↗
22. S. B. Piepho and P. N.Schatz , Group theory in spectroscopy: with applications to magnetic circular dichroism , Wiley-Interscience , 1983 , vol. 1
23. Han · Adv. Mater. · 2018 · e180149110.1002/adma.201801491 ↗
24. Hofmann · Phys. Rev. B: Condens. Matter Mater. Phys. · 1997 · 55 · 992410.1103/PhysRevB.55.9924 ↗
25. Vlaskin · J. Am. Chem. Soc. · 2013 · 135 · 1438010.1021/ja4072207 ↗
26. White · ACS Nano · 2011 · 5 · 415810.1021/nn200889q ↗
27. Vlaskin · Nano Lett. · 2009 · 9 · 437610.1021/nl9026499 ↗
28. Barrows · J. Phys. Chem. Lett. · 2015 · 6 · 307610.1021/acs.jpclett.5b01137 ↗
29. Schimpf · J. Phys. Chem. Lett. · 2012 · 3 · 126410.1021/jz300320y ↗
30. Chakraborty · J. Am. Chem. Soc. · 2016 · 138 · 1288510.1021/jacs.6b05949 ↗
31. Pinchetti · Nat. Nanotechnol. · 2018 · 13 · 14510.1038/s41565-017-0024-8 ↗
32. Pradhan · Angew. Chem., Int. Ed. · 2017 · 56 · 703810.1002/anie.201611526 ↗
33. Yang · J. Am. Chem. Soc. · 2015 · 137 · 1277610.1021/jacs.5b07888 ↗
34. Kuno · J. Chem. Phys. · 1998 · 108 · 424210.1063/1.475823 ↗
35. Le Thomas · Phys. Rev. Lett. · 2005 · 94 · 01680310.1103/PhysRevLett.94.016803 ↗
36. Li · Nano Lett. · 2001 · 1 · 34910.1021/nl015559r ↗
37. Norris · Phys. Rev. B: Condens. Matter Mater. Phys. · 1996 · 53 · 1633810.1103/PhysRevB.53.16338 ↗
38. Zhang · Phys. Rev. B: Condens. Matter Mater. Phys. · 2005 · 72 · 20531410.1103/PhysRevB.72.205314 ↗