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 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 language | English (US) |
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Article number | 428 |
Pages (from-to) | 1-11 |
Number of pages | 11 |
Journal | Nanoscale Research Letters |
Volume | 6 |
DOIs | |
State | Published - 2011 |
Externally published | Yes |
Funding
This work was supported by a DoD Era of Hope Scholar Award, Welch Foundation Grant C-1598. We thank Lissett Bickford and Oara Neumann for their assistance and helpful suggestions.
ASJC Scopus subject areas
- Condensed Matter Physics
- General Materials Science