By a News Reporter-Staff News Editor at Science Letter -- Investigators publish new report on Nanoparticles. According to news reporting out of Bilbao, Spain, by NewsRx editors, research stated, "We describe a simple and efficient methodology for the aqueous synthesis of stable, uniform, and size tunable Au@Ag core-shell nanoparticles (NPs) that are stabilized by citrate ions. The synthetic route is based on the stepwise Ag reduction on preformed Au NPs."
Our news journalists obtained a quote from the research from Basque Foundation for Science, "The final size of the core-shell NPs and therefore their optical properties can be modulated at least from 30 to 110 nm by either tuning the Ag shell thickness or changing the size of the Au core. The optical properties of the Au@Ag core-shell NPs resemble those of pure Ag NPs of similar sizes, which was confirmed by means of Mie extinction calculations. We additionally evaluated the surface-enhanced raman scattering (SERS) enhancing properties of Au@Ag core-shell NP colloids with three different laser lines (532, 633, and 785 nm). Importantly, such core-shell NPs also exhibit a higher SERS efficiency than Ag NPs of similar size under near-infrared excitation."
According to the news editors, the research concluded: "The results obtained here serve as a basis to select Au@Ag core-shell NPs of specific size and composition with maximum SERS efficiency at their respective excitation wavelengths for SERS-based analytical and bioimaging applications."
For more information on this research see: Size Tunable Au@Ag Core Shell Nanoparticles: Synthesis and Surface-Enhanced Raman Scattering Properties. Langmuir, 2013;29(48):15076-15082. Langmuir can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Langmuir - www.pubs.acs.org/journal/langd5)
Our news journalists report that additional information may be obtained by contacting A.K. Samal, Ikerbasque, Basque Fdn Sci, Bilbao 48011, Spain. Additional authors for this research include L. Polavarapu, S. Rodal-Cedeira, L.M. Liz-Marzan, J. Perez-Juste and I. Pastoriza-Santos (see also Nanoparticles).
Keywords for this news article include: Spain, Bilbao, Europe, Nanotechnology, Emerging Technologies
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