TAILIEUCHUNG - Synthesis of silver nanoparticles by y-ray irradiation using pva as stabilizer

Colloidal silver nanoparticles were synthesized by Co-60 ray irradiation of Ag+ in aqueous solution containing polyvinyl alcohol (PVA) as stabilizer and M ethyl alcohol as free radical (OH• ) scavenger. The effect of Ag+ concentration which varied from 1 to 50 mM on the saturated conversion dose (D) of Ag+ into Ag determined by UV-vis spectroscopy and the size of Ag nanoparticles characterized by transmission electron microscopy (TEM) were investigated. The dependence of D (kGy) and average size (d, nm) of Ag nanoparticles on Ag+ concentration was found out to be as: D (kGy) = [Ag+]2 + [Ag+] + (R2 = ) and d(nm) = [Ag+]2 + [Ag+] + (R2 = ) for Ag+ concentration from 1 to 50 mM stabilized by 2% PVA. Results indicated the Ag nanoparticles size to be in the range of 6 - 18 nm. The concentration of PVA ( - ) in the irradiated solution also considerably affected the silver nanoparticles size which decreased with increasing the amount of PVA in the solution. Due to the unique features of the processing procedures, thus Co-60 ray irradiation has been considered as a suitable method for mass production of colloidal silver nanoparticles. | Journal of Chemistry Vol. 45 Special issue P. 136 -140 2007 SYNTHESIS OF SILVER NANOPARTICLES BY y-RAY IRRADIATION USING PVA AS STABILIZeR Received 15 October 2007 BUI Duy DU1 DANG VAN PHU2 BUI Duy CAM3 NGUyEN Quoc HIEN2 institute of Applied Materials Science Vietnam National Institute for Science and Technology 2Research and Development Center for Radiation Technology Vietnam Atomic Energy Commission 3Natural Science College Hanoi National University SUMMARY Colloidal silver nanoparticles were synthesized by yCo-60 ray irradiation of Ag in aqueous solution containing polyvinyl alcohol PVA as stabilizer and M ethyl alcohol as free radical OH scavenger. The effect of Ag concentration which varied from 1 to 50 mM on the saturated conversion dose D of Ag into Ag determined by UV-vis spectroscopy and the size of Ag nanoparticles characterized by transmission electron microscopy TEM were investigated. The dependence of D kGy and average size d nm of Ag nanoparticles on Ag concentration was found out to be as D kGy Ag 2 Ag R2 and d nm Ag 2 Ag R2 for Ag concentration from 1 to 50 mM stabilized by 2 PVA. Results indicated the Ag nanoparticles size to be in the range of 6 - 18 nm. The concentration of PVA - in the irradiated solution also considerably affected the silver nanoparticles size which decreased with increasing the amount of PVA in the solution. Due to the unique features of the processing procedures thus yCo-60 ray irradiation has been considered as a suitable method for mass production of colloidal silver nanoparticles. I - INTRODUCTION Silver nanoparticles have attractive considerable interest owing to their potential applications in different areas such as in medicine as biocides for burn and traumatic wound 1 2 and radiotherapy 3 in catalysis 4 in electronics 5 as well as in agriculture 6 . A number of methods have been developed for the synthesis of silver nanoparticles stabilized by polymers

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