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<p>In this research work, we specify the fabrication and characterization of three unique hybrid nanostructures that employ nanostructures as substrate components: porous silicon (PSi), gold nanoparticles (Au NPs), and tungsten oxide nanoparticles (WO<sub>3</sub>). N-type silicon wafer oriented in the (100) direction was employed to fabricate PSi layers via photo-electrochemical etching (PECE) process. In this study, the etching conditions were set to a duration of 25&#xa0;min and a current density of 20&#xa0;mA cm<sup>2</sup>. Gold salt (HAuCl₄) was utilized to synthesize gold nanoparticles through ionic reduction methods, subsequently deposited onto the PSi layer. The tri-type hybrid nanostructures were fabricated by dip-coating the Au NPs/PSi hybrid layer with WO<sub>3</sub> NPs. To characterize the WO<sub>3</sub> NPs/PSi and WO<sub>3</sub> NPs/Au NPs/PSi hybrid nanostructures, many analyses were conducted including Fourier transform infrared spectroscopy FTIR, atomic force microscopy AFM, field-emission scanning electron microscopy FE-SEM, X-ray diffraction XRD, energy dispersive X-ray spectroscopy EDX, and photoluminescence spectroscopy PL. The nanostructured WO<sub>3</sub> NPs/Au NPs/PSi exhibited a specific surface area (S.S.A) of around 6.23 m<sup>2</sup>/g. The specific surface area for gold nanoparticles (Au NPs) was 6.47 m<sup>2</sup>/g, while that for WO₃ NPs was measured at 8.25 m<sup>2</sup>/g. The NP surface densities of WO<sub>3</sub> NPs/PSi and WO<sub>3</sub> NPs/Au NPs/PSi were ~ 5.5 × 10⁷ and ~ 3.2 × 10⁹ NPs/cm<sup>2</sup>, respectively. The produced tri-type hybrid nanostructures are inexpensive, easy to use, and ideal for gas-sensing applications.</p>

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Well Modification of Porous Silicon/WO3 Hybrid Structure by Incorporating A Gold Nanoparticles

  • 期刊论文

  • 发表日期：

    2025年8月7日

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  • Abeer Ghalib Hadi,
  • Alwan M. Alwan,
  • Ali A. Yousif

摘要

In this research work, we specify the fabrication and characterization of three unique hybrid nanostructures that employ nanostructures as substrate components: porous silicon (PSi), gold nanoparticles (Au NPs), and tungsten oxide nanoparticles (WO3). N-type silicon wafer oriented in the (100) direction was employed to fabricate PSi layers via photo-electrochemical etching (PECE) process. In this study, the etching conditions were set to a duration of 25 min and a current density of 20 mA cm2. Gold salt (HAuCl₄) was utilized to synthesize gold nanoparticles through ionic reduction methods, subsequently deposited onto the PSi layer. The tri-type hybrid nanostructures were fabricated by dip-coating the Au NPs/PSi hybrid layer with WO3 NPs. To characterize the WO3 NPs/PSi and WO3 NPs/Au NPs/PSi hybrid nanostructures, many analyses were conducted including Fourier transform infrared spectroscopy FTIR, atomic force microscopy AFM, field-emission scanning electron microscopy FE-SEM, X-ray diffraction XRD, energy dispersive X-ray spectroscopy EDX, and photoluminescence spectroscopy PL. The nanostructured WO3 NPs/Au NPs/PSi exhibited a specific surface area (S.S.A) of around 6.23 m2/g. The specific surface area for gold nanoparticles (Au NPs) was 6.47 m2/g, while that for WO₃ NPs was measured at 8.25 m2/g. The NP surface densities of WO3 NPs/PSi and WO3 NPs/Au NPs/PSi were ~ 5.5 × 10⁷ and ~ 3.2 × 10⁹ NPs/cm2, respectively. The produced tri-type hybrid nanostructures are inexpensive, easy to use, and ideal for gas-sensing applications.