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The Ag and Ag–SiO 2 nanoparticles were synthesized by γ-irradiation, and characterized by field-emission transmittance electron microscopy (FE-TEM), field-emission scanning electron microscopy (FE-SEM), and energy dispersive X-ray spectroscopy (EDXS). The electron microscopy images show that well-dispersed Ag nanoparticles of about 7nm were attached to the surface of SiO 2 nanoparticles...
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