Experimental and theoretical determination of the plasmonic responses and shape distribution of colloidal metallic nanoparticles

被引：27

作者：

Resano-Garcia, A. ^{[1
]}

Battie, Y. ^{[1
]}

Naciri, A. En ^{[1
]}

Akil, S. ^{[1
]}

Chaoui, N. ^{[1
]}

机构：

[1] Univ Lorraine, Inst Jean Barriol, LCP A2MC, F-57070 Metz, France

来源：

JOURNAL OF CHEMICAL PHYSICS | 2015年 / 142卷 / 13期

关键词：

OPTICAL-PROPERTIES; SILVER NANOPARTICLES; GOLD NANOPARTICLES; THIN-FILMS; COMPOSITES; DEPENDENCE; RESONANCE; NANORODS; COLORS; GROWTH;

D O I：

10.1063/1.4916917

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 optical properties of gold and silver nanoparticles (NPs) dispersed in water and distributed in shape are investigated by introducing a shape distributed effective medium theory (SDEMT). This model takes into account the variation of depolarization parameter induced by a NP shape distribution. Simulations show that the shape distribution induces an inhomogeneous broadening and a decrease of the amplitude of the plasmon band. The number of plasmon bands and their positions depend on both the mean value of depolarization parameter and the NP material. By fitting the measured absorption spectra with the SDEMT, we unambiguously demonstrate that the depolarization parameter distribution, i.e., the shape distribution of nanoparticles can be deduced from absorption spectra. (C) 2015 AIP Publishing LLC.

引用

页数：9

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