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<p>ZnO/polyaniline (PAni) composite structures were synthesized by chemical mixing and deposited on p-type silicon wafers via casting. Various PAni weight ratios (5%, 10%, 15%, and 20%) were incorporated to optimize sensing performance. The fabricated specimens were characterized using X-ray diffraction (XRD), UV-visible spectroscopy (UV-Vis), Raman spectroscopy, and field-emission scanning electron microscopy (FESEM). The ZnO/PAni composites exhibited higher crystallinity, a lower optical bandgap, and improved surface morphology. Gas-sensing tests were conducted at different hydrogen concentrations, demonstrating that the composite containing 15% PAni exhibited the highest sensitivity (S). These findings indicate that the ZnO/PAni composite is a suitable material for hydrogen-sensing applications at room temperature (~ 30&#xa0;°C).</p>

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Preparation of ZNO/polyaniline composite structures via chemical mixing on P-type silicon substrates for hydrogen sensing applications

  • 期刊论文

  • 发表日期：

    2026年5月11日

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  • Rawnaq A. Talib,
  • Husam S. Al-Salman,
  • Dalal N. Alhilfi,
  • M. J. Abdullah

摘要

ZnO/polyaniline (PAni) composite structures were synthesized by chemical mixing and deposited on p-type silicon wafers via casting. Various PAni weight ratios (5%, 10%, 15%, and 20%) were incorporated to optimize sensing performance. The fabricated specimens were characterized using X-ray diffraction (XRD), UV-visible spectroscopy (UV-Vis), Raman spectroscopy, and field-emission scanning electron microscopy (FESEM). The ZnO/PAni composites exhibited higher crystallinity, a lower optical bandgap, and improved surface morphology. Gas-sensing tests were conducted at different hydrogen concentrations, demonstrating that the composite containing 15% PAni exhibited the highest sensitivity (S). These findings indicate that the ZnO/PAni composite is a suitable material for hydrogen-sensing applications at room temperature (~ 30 °C).