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<p>Motivated by the extraordinary features of AgNO<sub>3</sub>, the PEG/CS/AgNO<sub>3</sub> polymer nanocomposites were prepared and characterized. AgNO<sub>3</sub> nanofillers were incorporated in the PEG-chitosan (CS) blends using the solution casting approach. The integration of AgNO<sub>3</sub> nanofillers aimed to modify the structural (crystallite size, micro strain and dislocation density), optical, and electrical/dielectric properties of the PEG/CS polymer blend. XRD analysis confirmed the semi-crystalline nature and the absence of large crystalline silver phases. FTIR spectra revealed strong coordination between Ag⁺ ions and hydroxyl and amine groups of the polymer blend. Raman analysis confirmed structural modification of the polymer network upon AgNO<sub>3</sub> addition. UV–Vis–NIR spectroscopy showed changes in optical features like optical bandgap (5.59 to 4.42&#xa0;eV), Urbach energy (0.684 to 1.157&#xa0;eV), and refractive index (1.92 to 2.09) associated with charge transfer interactions. Photoluminescence (PL) measurements indicated reduced emission intensity due to suppressed charge carrier recombination. FE-SEM images demonstrated uniform morphology with well-distributed nanofillers. Dielectric studies showed improvement in dielectric constant at lower frequencies (improved by 7 times i.e. from 10 to 70). Novelty of the work is lying in demonstrating the role of AgNO<sub>3</sub> in modification of the structural features of the PEG/CS matrix blend along with tailoring its optical and dielectric characteristics, thereby providing a multifunctional polymer nanocomposite for advanced device-oriented applications.</p>

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Tuning the structural, electrical, optical, and surface properties of PEG/CS polymer blend using AgNO3 nanomaterial

  • 期刊论文

  • 发表日期：

    2026年8月1日

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  • Komal,
  • Kavya Gangwar,
  • Shivratan Saini,
  • S. Z. Hashmi,
  • B. L. Choudhary,
  • A. M. Quraishi,
  • Shalendra Kumar,
  • P. A. Alvi

摘要

Motivated by the extraordinary features of AgNO3, the PEG/CS/AgNO3 polymer nanocomposites were prepared and characterized. AgNO3 nanofillers were incorporated in the PEG-chitosan (CS) blends using the solution casting approach. The integration of AgNO3 nanofillers aimed to modify the structural (crystallite size, micro strain and dislocation density), optical, and electrical/dielectric properties of the PEG/CS polymer blend. XRD analysis confirmed the semi-crystalline nature and the absence of large crystalline silver phases. FTIR spectra revealed strong coordination between Ag⁺ ions and hydroxyl and amine groups of the polymer blend. Raman analysis confirmed structural modification of the polymer network upon AgNO3 addition. UV–Vis–NIR spectroscopy showed changes in optical features like optical bandgap (5.59 to 4.42 eV), Urbach energy (0.684 to 1.157 eV), and refractive index (1.92 to 2.09) associated with charge transfer interactions. Photoluminescence (PL) measurements indicated reduced emission intensity due to suppressed charge carrier recombination. FE-SEM images demonstrated uniform morphology with well-distributed nanofillers. Dielectric studies showed improvement in dielectric constant at lower frequencies (improved by 7 times i.e. from 10 to 70). Novelty of the work is lying in demonstrating the role of AgNO3 in modification of the structural features of the PEG/CS matrix blend along with tailoring its optical and dielectric characteristics, thereby providing a multifunctional polymer nanocomposite for advanced device-oriented applications.