Stability of Colloidal Silver Nonoparticle Solutions Prepared by Chemical Reduction

H. Al-Khateeb, F. Alzoubi, M. Alqadi, M. Mohammed Department of Physics, Jordan University of Science and Technology (JUST), P.O. Box 3030, Irbid 22110, Jordan

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Three different samples of silver colloidal nanoparticles were synthesized via the chemical reduction method using three different stabilizers (citrate, PVP, SDS). The prepared samples were characterized using UV-vis spectra, TEM imaging and XRD analysis. Our results show that absorption spectra of the three samples were stable over time. Slight changes have occurred in the spectrum of the PVP sample, indicating lesser stability of this sample. TEM images show that silver nanoparticles are well dispersed in the three samples and the sizes of these nanoparticles range from 10.1±4.2 nm to 13.5±4.7 nm. XRD curves show that the prepared silver nanoparticles are of FCC crystal structure. The XRD curves were used to calculate the size of our nanocrystals and it is found that the average size of the nanoparticles in the citrate sample is 19.9 nm, in the PVP sample it is 11.5 nm, and in the SDS sample it is 12.5 nm. In conclusion, the prepared samples were stable over time and no considerable aggregation was observed.

DOI:10.12693/APhysPolA.134.217 topics: silver colloidal nanoparticles, chemical reduction method, sodium citrate, polyvinylpyrrolidone, sodium dodecyl sulfate