Conversion of silver nanoprisms into colloidal nanoparticles induced by femtosecond laser pulses

作者：Qitao Zhao, Lisong Hou, Chongjun Zhao, Sipeng Gu, Ruian Huang, Shuhua Ren · 发表于：Laser Physics Letters · 年份：2004 · DOI：10.1002/lapl.200310033 · 被引用次数：16 · 研究领域：Laser-Ablation Synthesis of Nanoparticles、Laser Material Processing Techniques、Laser-induced spectroscopy and plasma

Shape transformation of silver nanoprisms in aqueous solution was studied using femtosecond laser pulses. Irradiation of a pulsed Ti:Sapphire laser at 800 nm caused the shape change of the nanoprisms from triangle into sphere, forming a stable colloid of a narrow size distribution with the particle diameters having ∼10 nm. The effects of laser fluence on fragmentation and conversion were investigated using UV-vis absorption spectroscopy and transmission electron microscopy. The mechanism of laser-induced colloid formation is discussed. (© 2004 by HMS Consultants. Inc. Published exclusively by WILEY-VCH Verlag GmbH & Co.KGaA)