Effect of edge smoothening on the extinction spectra of metal nanoparticles

被引：13

作者：

Jayabalan, J. ^{[1
]}

Singh, Asha ^{[1
]}

Chari, Rama ^{[1
]}

机构：

[1] Raja Ramanna Ctr Adv Technol, Laser Phys Applicat Div, Indore 452013, India

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 04期

关键词：

extinction coefficients; melting; nanoparticles; surface plasmon resonance; surface structure; DISCRETE-DIPOLE APPROXIMATION; OPTICAL-PROPERTIES; SHAPE; SCATTERING;

D O I：

10.1063/1.3464321

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

To calculate the extinction spectrum of a metal nanoparticle, it is common to use a regular shape which is close to the experimental one. We show that, to model a real metal particle, it is essential to remove sharp corners and tips and smoothen the bounding surface. An efficient and simple method to smoothen the tips and corners of the model shape of the particle is presented. The extinction calculated using smoothed particles predicts more accurately the extinction spectrum of as grown particles as well as the changes in the extinction spectrum during melting and reshaping of the particle. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3464321]

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