Voltage-Induced Adsorbate Damping of Single Gold Nanorod Plasmons in Aqueous Solution

被引：70

作者：

Dondapati, S. K. ^{[1
,2
]}

Ludemann, M. ^{[3
,4
]}

Mueller, R. ^{[3
,4
]}

Schwieger, S. ^{[3
,4
]}

Schwemer, A. ^{[1
,2
]}

Haendel, B. ^{[3
,4
]}

Kwiatkowski, D. ^{[5
]}

Djiango, M. ^{[5
]}

Runge, E. ^{[3
,4
]}

Klar, T. A. ^{[1
,2
,3
,4
,5
]}

机构：

[1] Univ Munich, Photon & Optoelect Grp, Dept Phys, D-80799 Munich, Germany

[2] Univ Munich, CENS, Dept Phys, D-80799 Munich, Germany

[3] Ilmenau Univ Technol, Inst Phys, D-98684 Ilmenau, Germany

[4] Ilmenau Univ Technol, Inst Micro & Nanotechnol, D-98684 Ilmenau, Germany

[5] Johannes Kepler Univ Linz, Inst Appl Phys, A-4040 Linz, Austria

来源：

NANO LETTERS | 2012年 / 12卷 / 03期

关键词：

Plasmonics; electrochemistry; interface damping; ion sensing; nanoparticle plasmon resonance; localized surface plasmon resonance; QUARTZ-CRYSTAL MICROBALANCE; COLLOIDAL SILVER; METAL NANOPARTICLES; MATRIX ENVIRONMENT; OPTICAL-PROPERTIES; AU-NANOPARTICLES; OXIDE-GROWTH; INTERFACE; RESONANCE; SPECTROSCOPY;

D O I：

10.1021/nl203673g

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Unbiased gold nanoparticles are negatively charged in aqueous solution but not hydrated. Optical spectroscopy of voltage-clamped single gold nanoparticles reveals evidence that anion adsorption starts at positive potentials above the point of zero charge, causing severe but reversible plasmon damping in combination with a spectral red shift exceeding the linear double layer charging effect. Plasmon damping by adsorbate is relevant for the use of nanoparticles in catalysis, in biodiagnostics, and in surface enhanced Raman scattering.

引用

页码：1247 / 1252

页数：6

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