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Journal of Nanomaterials
Volume 2013, Article ID 986764, 9 pages
http://dx.doi.org/10.1155/2013/986764
Research Article

Preparation of Graphene Oxide Stabilized Nickel Nanoparticles with Thermal Effusivity Properties by Laser Ablation Method

1Wireless and Photonics Networks Research Center of Excellence (WiPNET), Faculty of Engineering, University Putra Malaysia, 43400 Serdang, Malaysia
2Department of Computer and Communication Systems Engineering, Faculty of Engineering, University Putra Malaysia, 43400 Serdang, Malaysia
3Department of Chemistry, Faculty of Science, University Putra Malaysia, 43400 Serdang, Malaysia
4Department of Physics, Faculty of Science, University Putra Malaysia, 43400 Serdang, Malaysia
5Low Dimensional Materials Research Centre, Physics Department, University of Malaya, Malaysia

Received 4 May 2013; Revised 20 August 2013; Accepted 28 August 2013

Academic Editor: Tianxi Liu

Copyright © 2013 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

Nickel nanoparticles were dispersed uniformly in a graphene oxide solution, using a laser ablation technique with different ablation times that ranged from 5 to 20 minutes. The results indicate that the nickel nanoparticle sizes inside the graphene oxide decreased, and the volume fraction for the nickel nanoparticles in the graphene oxide increased with an increasing ablation time. Further, using Fourier Transform Infrared Spectroscopy, the nickel nanoparticles in the graphene oxide demonstrate greater stability from possible agglomeration when the nanoparticle was capped with oxygen from the carboxyl group of the graphene oxide. The thermal effusivity of the graphene oxide and nickel nanoparticle graphene oxide composite was measured using a photoacoustic technique. The concentration of graphene oxide shifted from 0.05 mg/L to 2 mg/L, and the thermal effusivity increased from 0.153 W·s1/2·cm−2·K−1 to 0.326 W·s1/2·cm−2·K−1. In addition, the thermal effusivity of the nickel nanoparticles graphene oxide composite increased with an increase in the volume fraction of nickel nanoparticles from 0.1612 W·s1/2·cm−2·K−1 to 0.228 W·s1/2·cm−2·K−1.