Journal of Materials Research

Articles

Laser ablation synthesis and optical properties of copper nanoparticles

Amir Reza Sadrolhosseinia1, Ahmad Shukri Bin Muhammad Noora1 c1, Kamyar Shamelia2, Ghazaleh Mamdoohia3, Mohod Maarof Moksina4 and Mohod Adzir Mahdia5

a1 Wireless and Photonics Networks Research Center (WiPNet), Faculty of Engineering, University Putra Malaysia, 43400 UPM Serdang, Malaysia

a2 Department of Chemistry, Faculty of Science, University Putra Malaysia, 43400 UPM Serdang, Malaysia

a3 Wireless and Photonics Networks Research Center (WiPNet), Faculty of Engineering University Putra Malaysia, 43400 UPM Serdang, Malaysia

a4 Department of Physics, Faculty of Science, University Putra Malaysia, 43400 UPM Serdang, Malaysia

a5 Wireless and Photonics Networks Research Center (WiPNet), Faculty of Engineering, University, Putra Malaysia, 43400 UPM Serdang, Malaysia

Abstract

Copper nanoparticles (Cu-NPs) were prepared in virgin coconut oil (VCO) using a laser ablation technique. A copper plate immersed in VCO was irradiated by an Nd:YAG laser at wave lengths of 532 nm for 5, 10, 20, and 30 min. By increasing the ablation time from 5 to 30 min, the particle size inside the nanofluid decreased from 11 to 4 nm and the concentration, refractive index, and the volume fraction of copper nanofluid increased. The Cu-NPs were capped with oxygen from hydroxyl groups of the VCO, as verified by Fourier transform infrared spectroscopy. The refractive indices, obtained by analysis of the surface plasmon resonance signals increased from 1.44371 + 0.0034i to 1.44387 + 0.0142i, and special self-phase modulation due to nonlinearity effect was investigated.

(Received February 21 2013)

(Accepted August 13 2013)

Correspondence

c1 Address all correspondence to this author. e-mail: ashukri@upm.edu.my

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