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Laser ablation synthesis and optical properties of copper nanoparticles
Ist Teil von
Journal of materials research, 2013-09, Vol.28 (18), p.2629-2636
Ort / Verlag
New York, USA: Cambridge University Press
Erscheinungsjahr
2013
Link zum Volltext
Quelle
SpringerLink (Online service)
Beschreibungen/Notizen
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.