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Journal of Nanomaterials
Volume 2014, Article ID 962917, 8 pages
http://dx.doi.org/10.1155/2014/962917
Research Article

Optical Nonlinear Refractive Index of Laser-Ablated Gold Nanoparticles Graphene Oxide Composite

1Wireless and Photonic Networks Research Centre of Excellence (WiPNET), Faculty of Engineering Universiti Putra Malaysia, Malaysia
2Department of Computer and Communication Systems Engineering, Faculty of Engineering, Universiti Putra Malaysia (UPM), 43400 Serdang, Malaysia
3Department of Physics, Faculty of Science, Universiti Putra Malaysia (UPM), 43400 Serdang, Malaysia

Received 5 June 2014; Revised 26 August 2014; Accepted 7 September 2014; Published 3 November 2014

Academic Editor: Tianxi Liu

Copyright © 2014 Amir Reza Sadrolhosseini et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Gold nanoparticles were prepared in graphene oxide using laser ablation technique. The ablation times were varied from 10 to 40 minutes, and the particle size was decreased from 16.55 nm to 5.18 nm in spherical shape. The nanoparticles were capped with carboxyl and the hydroxyl groups were obtained from Fourier transform infrared spectroscopy. Furthermore, the UV-visible peak shifted with decreasing of nanoparticles size, appearing from 528 nm to 510 nm. The Z-scan technique was used to measure the nonlinear refractive indices of graphene oxide with different concentrations and a gold nanoparticle graphene oxide nanocomposite. Consequently, the optical nonlinear refractive indices of graphene oxide and gold nanoparticle graphene oxide nanocomposite were shifted from  cm2/W to  cm2/W and from  cm2/W to  cm2/W, respectively.