Dynamically Modulating the Surface Plasmon Resonance of Doped Semiconductor Nanocrystals

被引：482

作者：

Garcia, Guillermo ^{[1
,2
]}

Buonsanti, Raffaella ^{[1
]}

Runnerstrom, Evan L. ^{[1
,3
]}

Mendelsberg, Rueben J. ^{[1
,4
]}

Llordes, Anna ^{[1
]}

Anders, Andre ^{[4
]}

Richardson, Thomas J. ^{[5
]}

Milliron, Delia J. ^{[1
]}

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Mol Foundry, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA

[3] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA

[4] Univ Calif Berkeley, Lawrence Berkeley Lab, Plasma Applicat Grp, Berkeley, CA 94720 USA

[5] Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA

来源：

NANO LETTERS | 2011年 / 11卷 / 10期

关键词：

Surface plasmon; nanocrystal; indium tin oxide; spectroelectrochemistry; doping; OPTICAL-PROPERTIES; GOLD; ELECTROCHROMISM; NANOPARTICLES; FILMS;

D O I：

10.1021/nl202597n

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：4415 / 4420

页数：6

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