Drastic surface plasmon mode shifts in gold nanorods due to electron charging

被引：151
作者：
Mulvaney, Paul
Perez-Juste, Jorge
Giersig, Michael
Liz-Marzan, Luis M.
Pecharroman, Carlos
机构：
[1] Nanoparticle Technol Grp, Caesar Stiftung, D-53175 Bonn, Germany
[2] Univ Melbourne, Sch Chem, Parkville, Vic 3010, Australia
[3] Inst Ciencia Mat Madrid, Madrid 28049, Spain
来源：
PLASMONICS | 2006年 / 1卷 / 01期
基金：
澳大利亚研究理事会;
关键词：
gold rods; surface plasmon band; electron density; plasmon band shift; color changes;
D O I：
10.1007/s11468-005-9005-0
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：
The color of small gold rods changes dramatically when electrons are injected by chemical reductants. The longitudinal and transverse plasmon modes are both found to blue-shift, and the shift is larger for rods with larger aspect ratios. The color changes are visible to the eye for rods with aspect ratios around 2-3. It is found that the surface plasmon band is damped when charging becomes high. The effects are in qualitative agreement with a model in which the gold plasma frequency increases due to an increase in electron density.
引用
收藏
页码：61 / 66
页数：6
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