%0 Journal Article %T Nonlinear Coefficient Determination of Au/Pd Bimetallic Nanoparticles Using Z-Scan %A Jos¨¦ Luis Jim¨¦nez P¨¦rez %A Rub¨¦n Guti¨¦rrez-Fuentes %A Jos¨¦ Francisco S¨¢nchez Ram¨ªrez %A Omar Uriel Garc¨ªa Vidal %A Daniel Erick T¨¦llez-S¨¢nchez %A Zormy Nacary Correa Pacheco %A Alfredo Cruz Orea %A Jes¨²s Antonio Fuentes Garc¨ªa %J Advances in Nanoparticles %P 223-228 %@ 2169-0529 %D 2013 %I Scientific Research Publishing %R 10.4236/anp.2013.23031 %X

In this paper we present the nonlinear optical characterization of Au/Pd nanoparticles in order to obtain the nonlinear refractive indices using the Z-scan technique. The experiments were performed using a 514 nm laser beam Ar+, with 14 Hz of modulation frequency, as excitation source. By using a lens the excitation beam was focused to a small spot and the sample was moved across the focal region along the z-axis by a motorized translation stage. Seven samples with different concentration ratio of Au/Pd nanoparticles were prepared by simultaneous reduction of gold and palladium ions in presence of poly (N-vinyl-2-pirrolidone) (PVP) using ethanol as a reducing agent. In this work, we report the application of the Z-scan technique, to generate optical transmission of laser light as a function of the z position for solutions containing bimetallic nanoparticles of Au (core)/Pd (shell) with average sizes ranging from 3 to 5 nm. The magnitude of the obtained nonlinear refractive index was in the order of 10?8 cm2/W. Our results show that the nonlinear refractive index has a nonlinear behavior when the (Au/Pd) ratio was increased.

%K Nanofluids %K Nanoparticles %K Nonlinear Refractive Indices %K Z-Scan %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=35058