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<p>In this study, new polymethyl methacrylate (PMMA) composites were developed by doping with tin oxide (SnO<sub>2</sub>) nanoparticles at varying concentrations (2%, 5%, 10%, and 20% by weight) via solution casting. The dielectric properties and alternating current (AC) conductivity of SnO<sub>2</sub>/PMMA were examined. The impact of SnO<sub>2</sub> ratio, frequency and temperatures on the electrical properties were investigated. Unlike previous studies with limited conditions, our work systematically explores a broad frequency–temperature range, revealing deeper insights into interfacial polarization and charge transport. Results showed that the doping with SnO<sub>2</sub> nanoparticles significantly enhanced the dielectric constant (ε′), particularly at lower frequencies, due to increased interfacial polarization (Maxwell-Wagner-Sillars effect). The dielectric loss (ε″) also increased with SnO<sub>2</sub> content and temperature, reflecting enhanced interfacial polarization and restricted polymer chain mobility. The AC conductivity followed a power-law dependence on frequency, indicating charge hopping mechanisms, with higher conductivities observed in SnO<sub>2</sub>-doped PMMA. The real and imaginary parts of the electric modulus (M’ and M″) increased with nanoparticle content, suggesting improved dielectric relaxation. These results demonstrate that SnO<sub>2</sub> nanoparticles effectively enhance the dielectric and conductive properties of PMMA, making these composites suitable for advanced electronic applications.</p>

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Development of high-dielectric constant polymethyl methacrylate composites doped with tin oxide nanoparticles for advanced electronic applications

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年12月5日

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  • Nazeeha S. Alkayal,
  • Ali H. Bashal,
  • Talat Habeeb,
  • Abeer S. Elsherbiny

摘要

In this study, new polymethyl methacrylate (PMMA) composites were developed by doping with tin oxide (SnO2) nanoparticles at varying concentrations (2%, 5%, 10%, and 20% by weight) via solution casting. The dielectric properties and alternating current (AC) conductivity of SnO2/PMMA were examined. The impact of SnO2 ratio, frequency and temperatures on the electrical properties were investigated. Unlike previous studies with limited conditions, our work systematically explores a broad frequency–temperature range, revealing deeper insights into interfacial polarization and charge transport. Results showed that the doping with SnO2 nanoparticles significantly enhanced the dielectric constant (ε′), particularly at lower frequencies, due to increased interfacial polarization (Maxwell-Wagner-Sillars effect). The dielectric loss (ε″) also increased with SnO2 content and temperature, reflecting enhanced interfacial polarization and restricted polymer chain mobility. The AC conductivity followed a power-law dependence on frequency, indicating charge hopping mechanisms, with higher conductivities observed in SnO2-doped PMMA. The real and imaginary parts of the electric modulus (M’ and M″) increased with nanoparticle content, suggesting improved dielectric relaxation. These results demonstrate that SnO2 nanoparticles effectively enhance the dielectric and conductive properties of PMMA, making these composites suitable for advanced electronic applications.