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

✍ Scribed by Qitao Zhao; Lisong Hou; Chongjun Zhao; Sipeng Gu; Ruian Huang; Shuhua Ren

• Publisher: John Wiley and Sons
• Year: 2004
• Tongue: English
• Weight: 144 KB
• Volume: 1
• Category: Article
• ISSN: 1612-2011
• DOI: 10.1002/lapl.200310033

✦ Synopsis

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.

Absorption spectra of the silver nanoprisms after exposure to 800 nm femtosecond laser pulses for various time lengths.