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<p>The (PS/BaTiO<sub>3</sub>-SiC) nanocomposites were produced via the solution cast technique. The specimens consisted of a Polystyrene (PS) organic host matrix mixed with different concentrations of nano Barium titanate (BaTiO<sub>3</sub>) and nano Silicon carbide (SiC), varying from 0 to 5 weight%. This study investigated the structural, (linear/nonlinear) optical, and electrical properties of nanocomposites made up of (PS/BaTiO<sub>3</sub>-SiC). The FTIR analysis revealed a change in peak status and alterations in shape and intensity when compared with pure PS. The optical microscope images reveal a uniform distribution of nanoparticles within the blend, leading to the formation of continuous chains in the structure of the polymer. The experimental and theoretical findings regarding the optical properties of (PS/BaTiO<sub>3</sub>-SiC) nanocomposites indicated that the absorbance, absorption coefficient, extinction coefficient, refractive index, as well as the actual and imaginary dielectric constants, and optical conductivity of pure PVA enhanced with the increasing concentration of (BaTiO<sub>3</sub>- SiC) nanoparticles. The transmittance decreased with the growing concentration of (BaTiO<sub>3</sub>-SiC) nanoparticles. The energy band gap decreases from (4.11 to 2.41) eV and from (3.85 to 1.16) eV for allowed and forbidden transitions respectively with increasing of (BaTiO<sub>3</sub>-SiC) NPs concentration while the nonlinear susceptibility (χ<sup>(3)</sup>) and nonlinear refractive index (n<sub>2</sub>) increase from 1.26 × 10<sup>−12</sup> to 7.17 × 10<sup>−12</sup> and from 1.0310×<sup>−10</sup> to 2.0910×<sup>−10</sup>, respectively. The Urbach tail energy (E<sub>u</sub>), linear susceptibility (χ<sup>(1)</sup>), average oscillator parameter (λ<sub>o</sub>), zero-frequency dielectric constant (ε<sub>o)</sub> and zero-frequency refractive index (n<sub>o</sub>) increase with the increase of nanoparticles, while single-oscillator energy (E<sub>oso</sub>), dispersion energy (E<sub>d</sub>) and average oscillator strength (S<sub>o</sub>) decrease. The A.C electrical conductivity rises as the frequency increases. The dielectric constant and dielectric loss increase from 0.813 to 1.393 and from 0.325 to 0.571 respectively with increasing of (BaTiO<sub>3</sub>-SiC) NPs concentration. Compared to current pressure sensors, the (PS/BaTiO<sub>3</sub>-SiC) nanostructures exhibited enhanced pressure sensitivity, remarkable flexibility, and robust environmental resilience. The result indicate that these nanocomposites more suitable for applications in nonlinear optics, such as optical switching or frequency conversion.</p>

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Fabrication and development morphological, structural, dielectric, linear and nonlinear optical properties of PS/BaTiO3-SiC nanocomposites for optoelectronic and energy storage applications

  • 期刊论文

  • 发表日期：

    2025年2月28日

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  • Majeed Ali Habeeb,
  • Idrees Oreibi,
  • Rehab Shather Abdul Hamza

摘要

The (PS/BaTiO3-SiC) nanocomposites were produced via the solution cast technique. The specimens consisted of a Polystyrene (PS) organic host matrix mixed with different concentrations of nano Barium titanate (BaTiO3) and nano Silicon carbide (SiC), varying from 0 to 5 weight%. This study investigated the structural, (linear/nonlinear) optical, and electrical properties of nanocomposites made up of (PS/BaTiO3-SiC). The FTIR analysis revealed a change in peak status and alterations in shape and intensity when compared with pure PS. The optical microscope images reveal a uniform distribution of nanoparticles within the blend, leading to the formation of continuous chains in the structure of the polymer. The experimental and theoretical findings regarding the optical properties of (PS/BaTiO3-SiC) nanocomposites indicated that the absorbance, absorption coefficient, extinction coefficient, refractive index, as well as the actual and imaginary dielectric constants, and optical conductivity of pure PVA enhanced with the increasing concentration of (BaTiO3- SiC) nanoparticles. The transmittance decreased with the growing concentration of (BaTiO3-SiC) nanoparticles. The energy band gap decreases from (4.11 to 2.41) eV and from (3.85 to 1.16) eV for allowed and forbidden transitions respectively with increasing of (BaTiO3-SiC) NPs concentration while the nonlinear susceptibility (χ(3)) and nonlinear refractive index (n2) increase from 1.26 × 10−12 to 7.17 × 10−12 and from 1.0310×−10 to 2.0910×−10, respectively. The Urbach tail energy (Eu), linear susceptibility (χ(1)), average oscillator parameter (λo), zero-frequency dielectric constant (εo) and zero-frequency refractive index (no) increase with the increase of nanoparticles, while single-oscillator energy (Eoso), dispersion energy (Ed) and average oscillator strength (So) decrease. The A.C electrical conductivity rises as the frequency increases. The dielectric constant and dielectric loss increase from 0.813 to 1.393 and from 0.325 to 0.571 respectively with increasing of (BaTiO3-SiC) NPs concentration. Compared to current pressure sensors, the (PS/BaTiO3-SiC) nanostructures exhibited enhanced pressure sensitivity, remarkable flexibility, and robust environmental resilience. The result indicate that these nanocomposites more suitable for applications in nonlinear optics, such as optical switching or frequency conversion.