Dynamic light scattering in gold colloids prepared by laser ablation in water

被引：8
|
作者：
Zimbone, M. [1 ]
Calcagno, L. [1 ]
Baeri, P. [1 ]
Messina, G. C. [2 ]
Compagnini, G. [1 ,2 ]
机构：
[1] Catania Univ, Dept Chem, I-95123 Catania, Italy
[2] Catania Univ, Dept Phys, I-95123 Catania, Italy
来源：
APPLIED SURFACE SCIENCE | 2012年 / 258卷 / 23期
关键词：
Gold nanoparticles; Light scattering; Plasmon resonance; Laser ablation; NANOPARTICLES; IRRADIATION;
D O I：
10.1016/j.apsusc.2011.08.112
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：
A polarized and depolarized dynamic light scattering analysis on gold nano-colloids prepared by laser ablation in water has been conducted. This technique allows a simultaneous measurement of the translational and rotational diffusivities and has been applied to characterize 'as-prepared' and aggregated colloids obtained either by "spontaneous" or with "controlled" procedure. A simple model was applied to obtain information on the size, shape and anisotropy properties of the nanoparticles directly in the liquid state. The 'as-prepared' Au nanoparticles (AuNPs) are spherical, while a prolate ellipsoidal shape can be attributed to the aggregated nanoparticles. Depolarized dynamic light scattering results a powerful technique to determine the size and shape of AuNPs directly in solution. (C) 2011 Elsevier B. V. All rights reserved.
引用
收藏
页码：9246 / 9249
页数：4
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