Size-controlled synthesis of monodispersed gold nanoparticles via carbon monoxide gas reduction

Autor: Lewinski Nastassja, Langsner Robert, Kennedy Laura, Nammalvar Vengadesan, Lin Adam, Satyanarayan Arthi, Young Joseph, Drezek Rebekah
Jazyk: angličtina
Rok vydání: 2011
Předmět:
Zdroj: Nanoscale Research Letters, Vol 6, Iss 1, p 428 (2011)
Druh dokumentu: article
ISSN: 1931-7573
1556-276X
Popis: Abstract An in depth analysis of gold nanoparticle (AuNP) synthesis and size tuning, utilizing carbon monoxide (CO) gas as a reducing agent, is presented for the first time. The sizes of the AuNPs are tunable from ~4 to 100 nm by altering the concentration of HAuCl4 and inlet CO gas-injection flow rate. It is also found that speciation of aqueous HAuCl4, prior to reduction, influences the size, morphology, and properties of AuNPs when reduced with CO gas. Ensemble extinction spectra and TEM images provide clear evidence that CO reduction offers a high level of monodispersity with standard deviations as low as 3%. Upon synthesis, no excess reducing agent remains in solution eliminating the need for purification. The time necessary to synthesize AuNPs, using CO, is less than 2 min.
Databáze: Directory of Open Access Journals
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