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Title: Broadband Tunable Mid-infrared Plasmon Resonances in Cadmium Oxide Nanocrystals Induced by Size-Dependent Nonstoichiometry

Journal Article · · Nano Letters
 [1];  [2];  [2];  [2]; ORCiD logo [3];  [3];  [4];  [5];  [2];  [1];  [2];  [2]; ORCiD logo [6]; ORCiD logo [2]
  1. Soochow Univ., Jiangsu (China). Jiangsu Key Lab. for Carbon-Based Functional Materials & Devices, Joint International Research Lab. of Carbon-Based Functional Materials & Devices; Indiana Univ., Bloomington, IN (United States)
  2. Indiana Univ., Bloomington, IN (United States)
  3. Northern Illinois Univ., DeKalb, IL (United States)
  4. Argonne National Lab. (ANL), Lemont, IL (United States)
  5. Northern Illinois Univ., DeKalb, IL (United States); Argonne National Lab. (ANL), Lemont, IL (United States)
  6. Soochow Univ., Jiangsu (China). Jiangsu Key Lab. for Carbon-Based Functional Materials & Devices, Joint International Research Lab. of Carbon-Based Functional Materials & Devices.

A central theme of nanocrystal (NC) research involves synthesis of dimension-controlled NCs and study of size-dependent scaling laws governing their optical, electrical, magnetic, and thermodynamic properties. In this paper, 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 similar to 6.0 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.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Postdoctoral Program for Innovative Talents; National Key Research and Development Program of China
Grant/Contract Number:
AC02-06CH11357; 2016YFA0202402; BX201600113
OSTI ID:
1639011
Journal Information:
Nano Letters, Vol. 20, Issue 4; ISSN 1530-6984
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 22 works
Citation information provided by
Web of Science

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