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A composition and size controllable approach for Au-Ag alloy nanoparticles.
- Source :
-
Nanoscale research letters [Nanoscale Res Lett] 2012 Apr 18; Vol. 7 (1), pp. 225. Date of Electronic Publication: 2012 Apr 18. - Publication Year :
- 2012
-
Abstract
- A capillary micro-reaction was established for the synthesis of Au-Ag alloy nanoparticles (NPs) with a flexible and controllable composition and grain size by tuning the synthesis temperature, the residence time, or the mole ratio of Au3+:Ag+. By extending the residence time from 5 to 900 s, enhancing the temperature from 120°C to 160°C, or decreasing the mole ratio of Au3+:Ag+ from 1:1 to 1:20, the composition of samples was changed continuously from Au-rich to Ag-rich. The particles became large with the increase of the residence time; however, synthesis temperatures showed less effect on the particle size change. The particle size of the Au-Ag alloy NPs with various composition could be kept by adjusting the mole ratio of Au3+:Ag+. TEM observation displayed that the as-obtained NPs were sphere-like with the smallest average size of 4.0 nm, which is half of those obtained by the traditional flask method.
Details
- Language :
- English
- ISSN :
- 1556-276X
- Volume :
- 7
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Nanoscale research letters
- Publication Type :
- Academic Journal
- Accession number :
- 22513005
- Full Text :
- https://doi.org/10.1186/1556-276X-7-225