Kinetics of silver nanoparticle growth in aqueous polymer solutions: 1st Nano Update |
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Authors: | Zaheer Khan Shaeel Ahmed Al-Thabaiti FM Al-Nowaiser Abdullah Yousif Obaid Abdulrahman O Al-Youbi Maqsood Ahmad Malik |
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Institution: | 1. Department of Chemistry, Faculty of Science, King Abdul Aziz University, P.O. Box 80203, Jeddah 21413, Saudi Arabia;2. Department of Chemistry, Jamia Millia Islamia (Central University), New Delhi 110 025, India |
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Abstract: | In this paper we report the effect of poly(vinyl alcohol) (PVA) on the silver nanoparticles formation of different morphologies by using silver nitrate and citric acid as the oxidant and reductant, respectively, for the first time. Our transmission electron microscopy (TEM) results suggest that the presence of PVA has significant impact on the size, shape, and the size distribution of the silver nanoparticles. The reaction follows a zero-order kinetics in citric acid] as well as in silver(I)] in the absence and presence of PVA. It was found that PVA and cetyltrimethylammonium bromide (CTAB) concentrations show no significant effects on the rate of CTAB-stabilized silver nanoparticles formation, whereas in presence of PVA, the reaction rate increases with (CTAB). Both spectrophotometric and TEM measurement demonstrated that the orange silver sol consists of aggregates, whereas the purple sol does not contain the aggregated arrangement. On the basis of various observations, the most plausible mechanism has been envisaged. |
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Keywords: | Nanoparticles Polymer Citric acid Surfactant |
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