Abstract
Highly dispersed uniform silver nanoparticles were prepared by reducing silver diamine ions [Ag(NH3)2]+ with D-glucose in the presence of a stabilizing agent. Along with the nature of the dispersing agent, the pH and the temperature of the reaction had the most pronounced effect on the reduction rate, the nucleation of the metallic phase, and ultimately the size and dispersion of the resulting particles. Through suitable manipulations of these parameters, it was possible to prepare uniform Ag nanoparticles ranging in size from 30 to 120 nm. A rapid and complete reduction of the silver species was possible only at elevated pH and temperatures above 50 °C. The reduction of silver diamine ions in these conditions caused the complete cleavage of the C–C bond, resulting in the release of 12 electrons per molecule of D-glucose. It was also found that the addition of ammonia to an already acidified silver nitrate solution leads to the formation of a much more stable and safe-to-handle diamine complex.
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The authors would like to acknowledge the generous support provided for this work by NanoDynamics Inc., Buffalo, NY. This work was funded in part by National Science Foundation Grant DMR-0509104.
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Andreescu, D., Eastman, C., Balantrapu, K. et al. A simple route for manufacturing highly dispersed silver nanoparticles. Journal of Materials Research 22, 2488–2496 (2007). https://doi.org/10.1557/jmr.2007.0308
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DOI: https://doi.org/10.1557/jmr.2007.0308