Influence of dose on particle size of colloidal silver nanoparticles synthesized by gamma radiation |
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| Authors: | Kazem Naghavi Elias Saion Khadijeh Rezaee Wan Mahmood Mat Yunus |
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| Institution: | 1. Universiti Putra Malaysia, Physics Department, 43400 UPM SERDANG, Selangor, Malaysia;2. Department of Nuclear Engineering, Faculty of Modern Sciences and Technologies, University of Isfahan, Isfahan 81746-73441, Iran;1. Department of Chemical and Biological Engineering, Missouri University of Science and Technology, 400 W. 11th St. Rolla, MO 65409, USA;2. Department of Mining and Nuclear Engineering, Missouri University of Science and Technology, 301 W. 14th St. Rolla, MO 65409, USA;3. Department of Chemistry, College of Science, University of Baghdad, Jaderiya, Baghdad, Iraq;1. Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims (ICMR), CNRS UMR 7312, UFR des Sciences Exactes et Naturelles, Bâtiment 18 Europol''Agro, BP 1039, F-51687 Reims Cedex 2, France;2. Research and Development Center for Radiation Technology, Vietnam Atomic Energy Institute, 202A, Street 11, Linh Xuan Ward, Thu Duc District, Ho Chi Minh City, Vietnam;1. Department of Management Information Systems, Central Taiwan University of Science and Technology, Taichung, Taiwan, ROC;2. Institute of Biomedical Engineering and Materials Science, Central Taiwan University of Science and Technology, Taichung, Taiwan, ROC;3. Department of Biomedical Imaging and Radiological Sciences, Central Taiwan University of Science and Technology, Taichung, Taiwan, ROC;4. Department of Biomedical Imaging and Radiological Science, China Medical University, Taichung, Taiwan, ROC |
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| Abstract: | Colloidal silver nanoparticles were synthesized by γ-irradiation-induced reduction method of an aqueous solution containing silver nitrate as a precursor in various concentrations between 7.40×10?4 and 1.84×10?3 M, polyvinyl pyrrolidone for capping colloidal nanoparticles, isopropanol as radical scavenger of hydroxyl radicals and deionised water as a solvent. The irradiations were carried out in a 60Co γ source chamber at doses up to 70 kGy. The optical absorption spectra were measured using UV–vis spectrophotometer and used to study the particle distribution and electronic structure of silver nanoparticles. As the radiation dose increases from 10 to 70 kGy, the absorption intensity increases with increasing dose. The absorption peak λmax blue shifted from 410 to 403 nm correspond to the increase of absorption conduction electron energy from 3.02 to 3.08 eV, indicating the particle size decreases with increasing dose. The particle size was determined by photon cross correlation spectroscopy and the results showed that the particle diameter decreases exponentially with the increase of dose. The transmission electron microscopy images were taken at doses of 20 and 60 kGy and the results confirmed that as the dose increases the diameter of colloidal silver nanoparticle decreases and the particle distribution increases. |
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