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

作者：Zimbone M; Calcagno L; Baeri P; Messina G C; Compagnini G^*

来源：Applied Surface Science, 2012, 258(23): 9246-9249.

DOI：10.1016/j.apsusc.2011.08.112

• Gold nanoparticles
• Light scattering
• Plasmon resonance
• Laser ablation

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 %26apos;as-prepared%26apos; and aggregated colloids obtained either by %26quot;spontaneous%26quot; or with %26quot;controlled%26quot; 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 %26apos;as-prepared%26apos; 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.

• 出版日期2012-9-15