Synthesis of Silica Coated Silver Nanoparticles Using Reverse Micelles

Murugasu, Hemananthini (2016) Synthesis of Silica Coated Silver Nanoparticles Using Reverse Micelles. Final Year Project (Bachelor), Tunku Abdul Rahman University College.

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Abstract

In recent science study, Nanotechnology is a burning field for the researchers. Nanotechnology deals with the nanoparticles having a size of 1-100 nm in one dimension used significantly concerning medical chemistry, atomic physics, and all other known fields. Nanoparticles are used immensely due to its small size, orientation, physical properties, which are reportedly shown to change the performance of any other material which is in contact with these tiny particles. These particles can be prepared easily by different chemical, physical, and biological approaches. But the chemical approach is the most emerging approach of preparation, because, this method is easier than the other methods and less time consuming. The chemical approach employed in this study involves the concept of reverse micelle. Silver was of a particular interest for this process due to its evocative physical and chemical properties. The Ag NPs are further coated with silica because surface coating or surface modification of nanoparticles is necessary to improve and overcome the physicochemical limitations that would be likely to be encountered by the colloidal particles. These limitations include non-desired aggregation process, low stability and high chemical reactivity meet the desired properties. The silica coated Ag NPs are synthesized by reverse micelles replacing the conventional and traditional StÖber method. The nanoparticles synthesized were characterized by UV-Vis Spectrophotometer, XRD, and TEM. The nanoparticles were found to have the size of 20 nm. An observation of a bright yellow color solution has proved the formation of Ag NPs and the formation of a cloudy yellow solution has confirmed the synthesis of silica coated silver nanoparticles.