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<p>Current investigation reports in-situ polymerization of aniline in the presence of binary ZnO@CuO (ZCO) nanocomposites (NCPs) under acidic medium of fresh Lemon juice extract. The synthesized polyaniline (PANI) coated ZCO (ZCO@PANI) NCPs were analyzed for their potential application as a dielectric material for electronic industries. The synthesized NCPs were characterized through various analytical tools such as X-ray diffraction (XRD), High-resolution scanning electron microscopy (HRSEM), Fourier-transform infrared (FTIR) spectroscopy, Transmission electron microscopy (TEM), Photoluminescence (PL) spectrum and Ultraviolet-visible spectroscopy to identify their structural phase, optical band transition and microstructural morphology. The formation of core-shell structure was confirmed through TEM imaging for ZCO@PANI70% NCPs. The modified Debye function was used to fit the dielectric data over a frequency range of 100&#xa0;Hz to 120&#xa0;MHz, suggesting the involvement of multiple ionic species in the dielectric relaxation process. The calculated spreading factor and relaxation time ranged from 0.5215 to 0.7719 and 2.74 × 10<sup>− 4</sup> to 627.20 × 10<sup>− 4</sup> seconds, respectively. Variations in weight percentages of PANI in ternary NCPs significantly influenced the dielectric behavior of PANI by altering polarization mechanisms and charge carrier dynamics. Further, the contributions of grain boundaries and grains were analyzed by fitting Cole-Cole plots using an EIS spectrum analyser, and grains were found to be dominant. Overall, ZCO@PANI NCPs with 70 and 80 weight percentages of PANI demonstrated the highest AC conductivity and highest dielectric constant among ternary NCPs, making them a promising candidate for electromagnetic interference (EMI) shielding applications. However, the dielectric loss was comparably higher than that for pure PANI and ZCO, which can be optimized in future works. Therefore, both can be considered as potential candidates for energy storage devices such as capacitors and supercapacitors.</p>

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Lemon juice assisted synthesis of ternary ZnO@CuO@PANI nanocomposite as an efficient dielectric material for high-frequency applications

  • 期刊论文

  • 发表日期：

    2026年5月26日

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  • Pooja Pandey,
  • Chandra Shekhar Joshi,
  • Abhay Kumar Choubey

摘要

Current investigation reports in-situ polymerization of aniline in the presence of binary ZnO@CuO (ZCO) nanocomposites (NCPs) under acidic medium of fresh Lemon juice extract. The synthesized polyaniline (PANI) coated ZCO (ZCO@PANI) NCPs were analyzed for their potential application as a dielectric material for electronic industries. The synthesized NCPs were characterized through various analytical tools such as X-ray diffraction (XRD), High-resolution scanning electron microscopy (HRSEM), Fourier-transform infrared (FTIR) spectroscopy, Transmission electron microscopy (TEM), Photoluminescence (PL) spectrum and Ultraviolet-visible spectroscopy to identify their structural phase, optical band transition and microstructural morphology. The formation of core-shell structure was confirmed through TEM imaging for ZCO@PANI70% NCPs. The modified Debye function was used to fit the dielectric data over a frequency range of 100 Hz to 120 MHz, suggesting the involvement of multiple ionic species in the dielectric relaxation process. The calculated spreading factor and relaxation time ranged from 0.5215 to 0.7719 and 2.74 × 10− 4 to 627.20 × 10− 4 seconds, respectively. Variations in weight percentages of PANI in ternary NCPs significantly influenced the dielectric behavior of PANI by altering polarization mechanisms and charge carrier dynamics. Further, the contributions of grain boundaries and grains were analyzed by fitting Cole-Cole plots using an EIS spectrum analyser, and grains were found to be dominant. Overall, ZCO@PANI NCPs with 70 and 80 weight percentages of PANI demonstrated the highest AC conductivity and highest dielectric constant among ternary NCPs, making them a promising candidate for electromagnetic interference (EMI) shielding applications. However, the dielectric loss was comparably higher than that for pure PANI and ZCO, which can be optimized in future works. Therefore, both can be considered as potential candidates for energy storage devices such as capacitors and supercapacitors.