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<p>This research proposes a novel approach for the fabrication of gold nanoparticle-infused silicon substrates suitable for Surface-Enhanced Raman Scattering (SERS) applications. This process leverages Surface Plasmon Resonance (SPR) elicited by nanosecond laser irradiation upon Metal-Insulator-Metal (MIM, Au/AAO/Au) configurations. Utilization of a porous AAO film as the dielectric stratum, and subsequent gold deposition on both AAO surfaces, yields the requisite MIM arrangement. Exposure of this MIM structure to a 532&#xa0;nm nanosecond laser results in the induction of SPR and the generation of gold nanoparticles. By manipulating the laser energy density, we examined the distribution and size of the gold nanoparticles, significantly augmenting SERS performance and delivering a stable, homogenous substrate platform. Maximum SERS performance is realized on gold nanoparticle/silicon substrates averaging 100&#xa0;nm in diameter, prepared using a laser energy density of 90&#xa0;mJ/cm<sup>2</sup>. This technique introduces a fresh perspective for practical SERS applications in areas such as pollutant detection and food safety.</p> Graphical abstract <p></p>

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Nanosecond laser-induced surface plasmon resonance on MIM (Au/AAO/Au) for SERS enhancement on gold nanospheres/silicon substrate

  • 期刊论文

  • 发表日期：

    2026年3月30日

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  • Kang Wang,
  • Sipeng Luo,
  • Xiaoming Yin,
  • Zhiquan Guo,
  • Jingnan Zhao,
  • Yuanchen Cui,
  • Ruishen Wang

摘要

This research proposes a novel approach for the fabrication of gold nanoparticle-infused silicon substrates suitable for Surface-Enhanced Raman Scattering (SERS) applications. This process leverages Surface Plasmon Resonance (SPR) elicited by nanosecond laser irradiation upon Metal-Insulator-Metal (MIM, Au/AAO/Au) configurations. Utilization of a porous AAO film as the dielectric stratum, and subsequent gold deposition on both AAO surfaces, yields the requisite MIM arrangement. Exposure of this MIM structure to a 532 nm nanosecond laser results in the induction of SPR and the generation of gold nanoparticles. By manipulating the laser energy density, we examined the distribution and size of the gold nanoparticles, significantly augmenting SERS performance and delivering a stable, homogenous substrate platform. Maximum SERS performance is realized on gold nanoparticle/silicon substrates averaging 100 nm in diameter, prepared using a laser energy density of 90 mJ/cm2. This technique introduces a fresh perspective for practical SERS applications in areas such as pollutant detection and food safety.

Graphical abstract