Dynamically modulating the surface plasmon resonance of doped semiconductor nanocrystals.
basic_science · Level V
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- Record sourced from PubMed, PMID 21859093.
- Also identified by DOI 10.1021/nl202597n.
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Abstract
Localized surface plasmon absorption features arise at high doping levels in semiconductor nanocrystals, appearing in the near-infrared range. Here we show that the surface plasmons of tin-doped indium oxide nanocrystal films can be dynamically and reversibly tuned by postsynthetic electrochemical modulation of the electron concentration. Without ion intercalation and the associated material degradation, we induce a > 1200 nm shift in the plasmon wavelength and a factor of nearly three change in the carrier density.