Surface-enhanced Raman scattering and plasmon excitations from isolated and elongated gold nanoaggregates

被引：15

作者：

Hossain, Mohammad Kamal ^{[1
]}

Huang, Genin Gary ^{[1
]}

Kaneko, Tadaaki ^{[2
]}

Ozaki, Yukihiro ^{[1
]}

机构：

[1] Kwansei Gakuin Univ, Sch Sci & Technol, Dept Chem, Sanda, Hyogo 6691337, Japan

[2] Kwansei Gakuin Univ, Sch Sci & Technol, Dept Phys, Sanda, Hyogo 6691337, Japan

来源：

CHEMICAL PHYSICS LETTERS | 2009年 / 477卷 / 1-3期

关键词：

SINGLE-MOLECULE SERS; NEAR-FIELD; CRYSTAL VIOLET; ACTIVE SITES; NANOPARTICLES; SPECTROSCOPY; FLUORESCENCE; ADSORBATES;

D O I：

10.1016/j.cplett.2009.06.043

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Surface plasmon resonance (SPR) and subsequent surface-enhanced Raman scattering (SERS) of gold nanoaggregates were investigated with reference to hot-sites availability. Correlated SPR and SERS observation of the same sample shows that the plasmon excitations excited at the interstitials of nanoaggregates are more important rather than resonance conditions. The isolated aggregates mostly show a broadened SPR peak centered at similar to 560 nm overlapping absorption band of analytes, whereas the elongated aggregates yield several SPR peaks in the longer wavelength region and provide higher enhancement in SERS. Finite-different time-domain analysis predicts that the localization sites get increased at least double in elongated aggregates. (C) 2009 Published by Elsevier B. V.

引用

页码：130 / 134

页数：5

共 31 条

[1] Progress in plasmonic engineering of surface-enhanced Raman-scattering substrates toward ultra-trace analysis [J].