Free Reducing Agent, One Pot, and Two Steps Synthesis of Ag@SiO2 Core-shells using Microwave Irradiation

Authors M. Karimipour1, S. Mostoufirad1, M. Molaei1, H. Rezvani Nikabadi2, A. Ghasempour Nesheli3

1 Department of Physics, Vali-e-Asr University of Rafsanjan, 77139-36417 Rafsanjan, Iran

2 Faculty of science, International University of Imam Reza, Mashhad, Iran

3 Department of Physics, Shiraz Branch, Islamic Azad University, Shiraz, Iran

Issue Volume 8, Year 2016, Number 3
Dates Received 21 April 2016; published online 03 October 2016
Citation M. Karimipour, S. Mostoufirad, M. Molaei, et al., J. Nano- Electron. Phys. 8 No 3, 03020 (2016)
DOI 10.21272/jnep.8(3).03020
PACS Number(s) 78.67. – n; 81.07.Bc; 81.05.Dz
Keywords Ag@SiO2, Microwave (8) , APTS, Polyvinylpyrrolidone, Plasmon (6) .
Annotation In this work a new method for the fabrication of Ag@SiO2 nanoparticles have been proposed that is completely different from Stober method. Ag nanoparticles were synthesized using microwave irradiation. polyvinylpyrrolidone was used as stabilizer and capping agent, 3-Aminopropyltriethoxysilane as functionalizer of silver particles in fully ethanol solution. The Ag nanoparticles were used subsequently without any subtraction and treatment in the preparation of Ag@SiO2 core-shell nanoparticles. UV-Vis spectroscopy shows a characteristic plasmon peak at 400 nm and 430 nm for Ag nanoparticles and Ag@SiO2 core-shells. Transmission electron microscope images show that Ag nanoparticles have the average size of 10 nm. It is also depicted that SiO2 shell structure was formed uniformly with the average size of 10 nm. The application of 3-Aminopropyltriethoxysilane in the preparation of core-shells yields single Ag core structure.

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