Full Physical Preparation of Size-Selected Gold Nanoparticles in Solution:  Laser Ablation and Laser-Induced Size Control

Colloidal gold nanoparticles with a broad size distribution were prepared by laser ablation of a gold metal plate in an aqueous solution of sodium dodecyl sulfate (SDS) and were fragmented under irradiation of a 532 nm laser at different SDS concentrations and laser fluences. Gold nanoparticles with...

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Veröffentlicht in:The journal of physical chemistry. B 2002-08, Vol.106 (31), p.7575-7577
Hauptverfasser: Mafuné, Fumitaka, Kohno, Jun-ya, Takeda, Yoshihiro, Kondow, Tamotsu
Format: Artikel
Sprache:eng
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Zusammenfassung:Colloidal gold nanoparticles with a broad size distribution were prepared by laser ablation of a gold metal plate in an aqueous solution of sodium dodecyl sulfate (SDS) and were fragmented under irradiation of a 532 nm laser at different SDS concentrations and laser fluences. Gold nanoparticles with a desired average size (1.7−5.5 nm in diameter) were prepared by tuning properly the surfactant concentration and the laser fluence. The concentration of SDS was found to be higher than a critical micelle concentration so as to gain a significant size reduction and to obtain stable final products. Laser ablation in combination with the laser-induced size control provides a versatile full physical preparation method of size-selected gold nanoparticles.
ISSN:1520-6106
1520-5207
DOI:10.1021/jp020577y