The synthesis of egg-white (EW) capped silver nanoparticles (NPs) was carried-out in a one-step reaction using crude EWs, which is a reagent that can be easily found. These NPs were applied for the colorimetric detection of Hg2+ ions in solution. The results showed a blue shift of the surface plasmon absorption due to the decrease in Ag NP size upon incorporating Hg through the formation of an Ag-Hg amalgam shell. The probe was used for the selective determination of Hg2+ ions in tap water with excellent selectivity and sensitivity with a detection limit of about 300 nM.
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Dr. Tirado-Guizar gratefully acknowledges the support from Consejo Nacional de Ciencia y Tecnologia, Mexico (CONACyT) for a postdoctoral grant. We also thank to C. Ornelas and W. Antunes for the technical support in microscopy at Nanotech CIMAV-Chihuahua, Mexico.
The supplementary material for this article can be found at https://doi.org/10.1557/mrc.2017.74.
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Tirado-Guizar, A., Rodriguez-Gattorno, G., Paraguay-Delgado, F. et al. Eco-friendly synthesis of egg-white capped silver nanoparticles for rapid, selective, and sensitive detection of Hg(II). MRS Communications 7, 695–700 (2017). https://doi.org/10.1557/mrc.2017.74