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

Joseph K. Young, Nastassja A. Lewinski, Robert J. Langsner, Laura C. Kennedy, Arthi Satyanarayan, Vengadesan Nammalvar, Adam Y. Lin, Rebekah A. Drezek

Research output: Contribution to journalArticlepeer-review

50 Scopus citations


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 HAuCl 4 and inlet CO gas-injection flow rate. It is also found that speciation of aqueous HAuCl 4, 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.

Original languageEnglish (US)
Article number428
Pages (from-to)1-11
Number of pages11
JournalNanoscale Research Letters
StatePublished - 2011
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Materials Science(all)


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