Linear and nonlinear optical properties of innovative synthesis of nickel nanoparticles in polystyrene matrix as a new optical system

被引:17
作者
Abomostafa, H. M. [1 ]
机构
[1] Menoufia Univ, Phys Dept, Fac Sci, Shibin Al Kawm, Egypt
关键词
Polystyrene (PS); Ni nanoparticles; Linear and nonlinear (NLO) optical; properties;
D O I
10.1016/j.molstruc.2020.129126
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The manuscript reports the effect of incorporation of Ni nanoparticles into polystyrene matrix on the linear and nonlinear optical properties (NLO). The Ni-PS nanocomposite films were synthesized by casting method. The structure of synthesized Ni nanoparticles was analyzed by High-resolution transmission electron microscope (HRTEM). It obvious the formation of nickel nanoparticles like needle shaped particles. The optical properties of the Ni-PS nanocomposite films have been studied from the optical reflection data recorded by UV-Visible spectrometer at typical frequencies of light in the wavelengths range of 850-2000 nm. The linear optical parameters (linear refractive index n, indirect optical energy gap (E-g), oscillator energy (E-0), dispersion energy (E-d), real and imaginary part of dielectric constants and the optical conductivity were evaluated and discussed. The indirect optical energy gap decreased from 4.54 to 3.91 eV as Ni nanoparticles increased. The dispersion of refractive index was studied using single oscillator Wemple-Di Domenico model. The third order nonlinear optical properties (chi((3))), nonlinear refractive index (n(2)) were found to increase as Ni nanoparticles increased and were estimated to be in the range of 7.5 x 10(-19) - 9.4 x 10(-14)esu and 27 x 10(-18) - 206 x 10(-14)esu respectively. The nonlinear absorption coefficient beta(c) also increased as the Ni content increased. Furthermore, the electrical susceptibility chi(e) and relative permittivity epsilon(r) increased by Ni content. So, Ni-PS nanocomposite films are promising candidate for nonlinear optical devices. (C) 2020 Published by Elsevier B.V.
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页数:10
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