In this work Ag nanoparticles have been synthesized using microwave irradiation. The synthesis parameters were optimized. The as-prepared Ag particles were employed to synthesis Ag@TiO 2 core- shell nanoparticles without any treatment from the initial solution.Uv-vis spectroscopy and TEM imaging were applied for particle characterizations. the Ag nanoparticles own a Plasmon peak at /02 nm which corresponds to particles with size of 10-20 nm. it is in consistency with TEM results. Oleyamine was found to be an effective capping agent and Dymethylformamide as reduction agent for the synthesis of Ag nanoparticles. After the formation of TiO 2 shell, The Plasmon peak of Ag nanoparticles shifted to /30nm. the obtained particles had a dark-brown color which is the characteristic of the formation of Ag@TiO 2 core-shell structure.

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