Dynamically Modulating the Surface Plasmon Resonance of Doped Semiconductor Nanocrystals
Garcia, Guillermo, Raffaella Buonsanti, Evan L. Runnerstrom, Rueben J. Mendelsberg, Anna Llordes, André Anders, Thomas J. Richardson, Delia J. Milliron
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.
Year of Publication
Building Technologies Department, Building Technology and Urban Systems Division, Windows and Envelope Materials