Synthesis of Gold Nanoparticles and Theimprovement of their Optical Properties and Mass Attenuation Coefficient under Gamma-ray Irradiation

Dehghani, Z.; Vejdani Noghreiyan, A.; H. Majles Ara, M.; Nadafan, M.

Synthesis of Gold Nanoparticles and Theimprovement of their Optical Properties and Mass Attenuation Coefficient under Gamma-ray Irradiation

Authors

Z. Dehghani ¹

A. Vejdani Noghreiyan ¹

M. H. Majles Ara ²

M. Nadafan ³

¹ Department of Physics, University of Neyshabur, Neyshabur

² Photonics Lab., Physics Department, Kharazmi University, Tehran,Iran

³ Department of physics, Tarbiat Modares University, Tehran, Iran

Abstract

Au nanoparticles have been synthesis by chemical method. Optical properties of Au nanoparticles have been studied by using UV-Vis and z-scan method and Raman spectroscopy. In addition, the mass attenuation coefficients of the synthesized nanoparticles at different energies were measured by the gamma spectroscopy method. The UV-Vis spectrum of these nanoparticles exhibit an absorption peak at 530 nm region. Nonlinear reflection and nonlinear absorption indexes obtain from close aperture and open aperture z-scan in order of 10-8 cm2/W and 10-4 cm/W were studied with using continue wave Ne: YAG laser λ532 nm by use of closed aperture and open aperture z-scan setup, respectively. The performed measurements show that gamma irradiation affects the mass attenuation coefficient and optical properties of Au nanoparticles.

Keywords

Au nanoparticles

Optical properties

Raman spectroscopy

z-scan method

attenuation coefficient

gamma irradiation