Facile Photochemical Synthesis of Unprotected Aqueous Gold Nanoparticles

Facile Photochemical Synthesis of Unprotected Aqueous Gold Nanoparticles

Aqueous, unprotected gold nanoparticles were prepared from HAuCl4 using a water-soluble benzoin (Irgacure-2959) as a photochemical source of strongly reducing ketyl radicals. This rapid method provides spatiotemporal control of nanoparticle generation, while light intensity can be used to control pa...

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Veröffentlicht in:Journal of the American Chemical Society 2006-12, Vol.128 (50), p.15980-15981
Hauptverfasser: McGilvray, Katherine L, Decan, Matthew R, Wang, Dashan, Scaiano, Juan C
Format: Artikel
Sprache:eng
Schlagworte:
Chemistry
Exact sciences and technology
General and physical chemistry
Gold - chemistry
Microscopy, Electron, Transmission
Molecular Structure
Nanoparticles - chemistry
Nanoparticles - ultrastructure
Photochemistry
Physical chemistry of induced reactions (with radiations, particles and ultrasonics)
Spectrum Analysis
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Beschreibung
Zusammenfassung:Aqueous, unprotected gold nanoparticles were prepared from HAuCl4 using a water-soluble benzoin (Irgacure-2959) as a photochemical source of strongly reducing ketyl radicals. This rapid method provides spatiotemporal control of nanoparticle generation, while light intensity can be used to control particle size. The particles are stable for months and do not require any of the conventional (S, N, or P) stabilizing ligands, although these can be readily incorporated if required.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja066522h