Synthesis and optical properties of silver nanoparticles/ polystyrene nanocomposite

Reza M. Tilaki 1Azam Iraji zad 1Seyed Mohammad Mahdavi 1Mehdi Ranjbar Maryam Raftari 1

1. Sharif University of Technology, Azadi Avenue, Tehran 14588, Iran


Silver nanoparticles/polystyrene nanocomposites were prepared via casting the solution of polystyrene in a mixture of carbon tetrachloride and acetone containing silver nanoparticles. Colloidal silver nanoparticles in acetone were synthesized by pulsed laser ablation of pure bulk silver. Nd:YAG laser at wavelength of 1064 nm, 130 mJ/pulse energy, 10 ns duration and reparation rate of 10 Hz has been employed to synthesis of nano silvers. TEM images show rather spherical nanoparticles with mean diameter of 3 nm. Silver nanoparticles in acetone are stable even after 8 months. Optical measurements of nano silver in acetone exhibit single maximum of optical extinction at 399 nm which is related to surface plasmon resonance. Casting the solution of nano silver in a mixture of carbon tetrachloride, acetone and polystyrene results a transparent polymeric sheet in light yellow color. Maximum of optical extinction of the sheet appeared at 428 nm and exhibited a red shift due to change of refractive index of the medium. The peak optical extinction spectra are in agreement with that calculated from the Mie theory for 5 nm spherical silver particles in polystyrene. This study demonstrates that hybridizing of pulsed laser ablation in liquids with casting method provides a simple, applicable and flexible technique in order to fabricate nanocomposite from different metals and polymers.


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Presentation: Oral at E-MRS Fall Meeting 2006, Symposium D, by Maryam Raftari
See On-line Journal of E-MRS Fall Meeting 2006

Submitted: 2006-05-14 15:00
Revised:   2009-06-07 00:44