Localized Plasmon resonance in metal nanoparticles using Mie theory

5th Colombian Conference of Engineering Physics

物理学;工业技术

Duque, J.S.^1 ; Blandón, J.S.^1 ; Riascos, H.^1

Grupo Plasma, Láser y Aplicaciones, Universidad Tecnológica de Pereira, Colombia^1

关键词: Co Nanoparticles;    Cu nano-particles;    Electric field intensities;    Laser ablation technique;    Localized plasmon resonance;    Ni Nanoparticles;    Scattering light;    UV-vis spectroscopy;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/850/1/012017/pdf
DOI  :  10.1088/1742-6596/850/1/012017

学科分类：工业工程学

来源: IOP

【 摘 要 】

In this work, scattering light by colloidal metal nanoparticles with spherical shape was studied. Optical properties such as diffusion efficiencies of extinction and absorption Qextand Qabswere calculated using Mie theory. We employed a MATLAB program to calculate the Mie efficiencies and the radial dependence of electric field intensities emitted for colloidal metal nanoparticles (MNPs). By UV-Vis spectroscopy we have determined the LSPR for Cu nanoparticles (CuNPs), Ni nanoparticles (NiNPs) and Co nanoparticles (CoNPs) grown by laser ablation technique. The peaks of resonances appear in 590nm, 384nm and 350nm for CuNPs, NiNPs and CoNPs respectively suspended in water. Changing the medium to acetone and ethanol we observed a shift of the resonance peaks, these values agreed with our simulations results.