Dynamically Modulating the Surface Plasmon Resonance of Doped Semiconductor Nanocrystals

TitleDynamically Modulating the Surface Plasmon Resonance of Doped Semiconductor Nanocrystals
Publication TypeJournal Article
Year of Publication2011
AuthorsGuillermo Garcia, Raffaella Buonsanti, Evan L. Runnerstrom, Rueben J. Mendelsberg, Anna Llordes, André Anders, Thomas J. Richardson, Delia J. Milliron
JournalNano Letters
Volume11
Issue10
Pagination4415 - 4420
Date Published10/2011
ISSN1530-6984
Keywordsdoping, indium tin oxide, nanocrystal, spectroelectrochemistry, surface plasmon
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.

DOI10.1021/nl202597n
Short TitleNano Lett.