Broadband Tunable Mid-infrared Plasmon Resonances in Cadmium Oxide Nanocrystals Induced by Size-Dependent Nonstoichiometry
Author ORCID Identifier
Liguang Wang:https://orcid.org/0000-0003-3000-3256
Publication Title
Nano Letters
ISSN
15306984
E-ISSN
43888
Document Type
Article
Abstract
A central theme of nanocrystal (NC) research involves synthesis of dimension-controlled NCs and studyof size-dependent scaling laws governing their optical, electrical, magnetic, and thermodynamic properties. Here, we describe the synthesis of monodisperse CdO NCs that exhibit high quality-factor (up to 5.5) mid-infrared (MIR) localized surface plasmon resonances (LSPR) and elucidate the inverse scaling relationship between carrier concentration and NC size. The LSPR wavelength is readily tunable between 2.4 and âˆ6.0 μm by controlling the size of CdO NCs. Structural and spectroscopic characterization provide strong evidence that free electrons primarily originate from self-doping due to NC surface-induced nonstoichiometry. The ability to probe and to control NC stoichiometry and intrinsic defects will pave the way toward predictive synthesis of doped NCs with desirable LSPR characteristics.
First Page
2821
Last Page
2828
Publication Date
4-8-2020
DOI
10.1021/acs.nanolett.0c00542
PubMed ID
32105491
Keywords
cadmium oxide, Mid-infrared plasmonics, nonstoichiometry, self-doping
Recommended Citation
Liu, Zeke; Zhong, Yaxu; Shafei, Ibrahim; Jeong, Soojin; Wang, Liguang; Nguyen, Hoai T.; Sun, Cheng Jun; Li, Tao; Chen, Jun; Chen, Lei; Losovyj, Yaroslav; Gao, Xinfeng; Ma, Wanli; and Ye, Xingchen, "Broadband Tunable Mid-infrared Plasmon Resonances in Cadmium Oxide Nanocrystals Induced by Size-Dependent Nonstoichiometry" (2020). NIU Bibliography. 379.
https://huskiecommons.lib.niu.edu/niubib/379
Department
Department of Chemistry and Biochemistry
