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<p>Herein, biodegradable polymers (PVA and PVP) are considered for fabricating the nanocomposite film by incorporating CoFe<sub>2</sub>O<sub>4</sub> (PPC). As fabricated PPC nanocomposite films are subjected to 30&#xa0;kGy gamma irradiation, and the film's structural, optical, dielectric, and AC conductivity were studied before and after the irradiation scenario to understand the impact of gamma irradiation. FTIR analysis confirms the structural variation in the PPC nanocomposite film after irradiation by a decrease in intensity and shifting of the peak from its original position. The crystallinity of PPC films decreased from (69.58–79.04%) to (65.08–71.52%)by gamma irradiation due to disorders leading to an increased dislocation density (δ) and microstrains (ε). Owing to the gamma irradiation, the direct and indirect band gaps have been reduced due to the increased availability of states for charge transitions from valence to conduction bands. Similarly, the nonlinear dielectric properties, and AC conductivity of PPC nanocomposite films were enhanced after irradiation. This evidence confirms the potential of PPC nanocomposite films in optoelectronic device applications.</p>

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Influence of Gamma Irradiation in Enhancing Optoelectronic Properties of CoFe2O4 Embedded PVA/PVP Films

  • 期刊论文

  • 发表日期：

    2026年1月6日

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  • M. Shivanand,
  • S. Manjunatha,
  • G. B. Devidas,
  • Y. T. Ravikiran

摘要

Herein, biodegradable polymers (PVA and PVP) are considered for fabricating the nanocomposite film by incorporating CoFe2O4 (PPC). As fabricated PPC nanocomposite films are subjected to 30 kGy gamma irradiation, and the film's structural, optical, dielectric, and AC conductivity were studied before and after the irradiation scenario to understand the impact of gamma irradiation. FTIR analysis confirms the structural variation in the PPC nanocomposite film after irradiation by a decrease in intensity and shifting of the peak from its original position. The crystallinity of PPC films decreased from (69.58–79.04%) to (65.08–71.52%)by gamma irradiation due to disorders leading to an increased dislocation density (δ) and microstrains (ε). Owing to the gamma irradiation, the direct and indirect band gaps have been reduced due to the increased availability of states for charge transitions from valence to conduction bands. Similarly, the nonlinear dielectric properties, and AC conductivity of PPC nanocomposite films were enhanced after irradiation. This evidence confirms the potential of PPC nanocomposite films in optoelectronic device applications.