Uniform Au-Ag alloy nanoparticles have been synthesized on cellulose nanocrystal (CNXL) by co-reduction method of corresponding metal ions. CNXL that plays a dual role of a matrix and of a stabilizer has been used to obtain stable dispersions of alloy nanoparticles. The composition of alloy nanoparticles indicates quantitative deposit of metal ions on CNXL surface followed by reduction. The sizes of alloy nanoparticles were controlled in the range of 3-7 nm by capping agent, sodium citrate, and their average diameter was increased with an increase of Ag content. Aqueous suspensions of Au-Ag alloy nanoparticles and their dried films are characterized by UV-Vis spectroscopy, Field Emission-Scanning Electron Microscope (FE-SEM), Transmission Electron Microscope (TEM), and X-ray Diffraction (XRD).
Revised: April 25, 2008 |
Published: April 3, 2008
Citation
Shin Y., I. Bae, B.W. Arey, and G.J. Exarhos. 2008.Facile stabilization of gold-silver alloy nanoparticles on cellulose nanocrystal.Journal of Physical Chemistry C 112, no. 13:4844-4848.PNNL-SA-58613.doi:10.1021/jp710767w