Gold silver core shell nanoparticles free#
The size dependence of these properties falls into two groups: the first one includes those properties related to changes in the energy levels of system, passing from a continuous system to a discrete system and the second one includes those properties related to surface plasmon resonance (SPR), which is the coherent excitation of all the free electrons in the conduction band produced by a beam of incident light.
The size reduction of materials to the nanometric scale brings important effects on their optical properties. Nanoparticles, bimetallic, core-Shell, gold, Silver, Au/Ag The development of this process, which is benign for the environment, opens the possibility for many applications in the areas of renewable energy, medicine and biology. The average hydrodynamic size and the size distribution of the synthesized nanoparticles were obtained by dynamic light scattering. To obtain a better understanding of the coating conditions, high resolution transmission electron microscopy was used. The absorption peaks of the surface plasmon band show a clear red-shift due to size effect in the case of the silver surface, and a plasmon coupling effect, in the case of gold. Using the optical properties of metallic nanoparticles, surface plasmon resonance was determined by UV-Vis spectroscopy, and the values obtained for gold and silver were approximately 520 nm and 400 nm in wavelength, respectively. Gold nanoparticles were synthesized, and silver cations were then reduced on the nanoparticles. Received 7 August 2015 accepted 6 November 2015 published 9 November 2015īimetallic gold-silver core-shell nanoparticles were prepared by chemical reduction in aqueous solution, following a method that was friendly to the environment, allowing us to use this for medicinal purposes.
Gold silver core shell nanoparticles license#
This work is licensed under the Creative Commons Attribution International License (CC BY). 1Facultad de Ciencias, Universidad Nacional de Ingeniería, Lima, PerúĢLaboratorio Nacional de Nanotecnología, Centro de Investigación de Materiales Avanzados, Chihuahua, MéxicoĬopyright © 2015 by authors and Scientific Research Publishing Inc.
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