Clean synthesis of silver nanoparticles by radiochemical methods for antimicrobial materials

Gamma ray is ionic radiation which has high energy so that it can be used to synthesize nanoparticles. This synthesis method has advantages as a clean synthesis which can simultaneously regulate the shape and size of particles. This paper reports the preparation of colloidal silver nanoparticles that have been synthesized with gamma ray radiation and used for anti-microbial materials. In this synthesis, polyvinyl alcohol has been used as a capping agent and silver nitrate with a concentration of 10 mM as a precursor. The sample solution was irradiated using gamma rays with varying doses of 0.5, 1.0 and 2.0 kGy. The silver nanoparticles were characterized using a UV-Vis spectrophotometer and their antimicrobial properties were tested using the well diffuse method. The UV-Vis absorbance spectrum shows that as the radiation dose increases, the absorption intensity increases. The absorption peaks are at wavelengths of 408ânm, 415ânm, and 420 nm which are the LSPR characteristics of silver nanoparticles and correspond to the increasing dose received by the sample. Synthesized silver nanoparticles showed the ability to inhibit the growth of E. coli and S. aureus bacteria. These results provide evidence that the radiochemical synthesis of silver nanoparticles with gamma rays provides good prospects for the application of antimicrobial materials