Affiliation:
1. Department of Chemistry and Biochemistry 102 Varsity Way Chemical Sciences Laboratory Florida State University Tallahassee FL 32306 USA
2. National High Magnetic Field Laboratory Tallahassee FL 32310 USA
3. Department of Chemistry and Laboratory for Nanophotonics Rice University Houston TX 77005 USA
Abstract
AbstractCorrelating data from optical, structural, and theoretical methods allows the properties of highly faceted Cd2SnO4 (CTO) inverted spinel plasmonic semiconductor nanocrystals (PSNCs) to be fully evaluated. The use of Sn(II) in the colloidal reaction for CTO results in reproducible octahedral PSNCs with an aspect ratio of 1.30. Correlating extinction spectra with magnetic circular dichroism yields a carrier density (n = 5.19 × 1019 cm−3) and carrier effective mass (m* = 0.022me) respectively. 113Cd and 119Sn solid‐state NMR experiments show clear evidence of metallic‐like carriers in CTO NCs based upon the observation of Knight shifts. These data suggest that carrier formation in CTO arises from Sn antisite occupation of octahedral Cd sites (SnCd). From a broader perspective, the results point to wide‐bandgap spinels as being an important but understudied class of plasmonic PSNCs.
Funder
National Science Foundation
U.S. Department of Defense
Division of Mathematical Sciences
Division of Materials Research
Air Force Office of Scientific Research