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<p>In this study, we measured the surface-enhanced Raman scattering (SERS) spectra of 4-aminothiophenol (4-ATP) using substrates coated with different noble metals paired with multiple wavelengths of laser. After theoretical and experimental studies, we propose a mechanism for the effect of different test conditions on the SERS spectra. For the 532&#xa0;nm laser, the damage to the molecule and the Au-S bond is primarily attributed to the photothermal effect of the metal. For the 785&#xa0;nm laser, it is primarily due to the synergistic induction of oxidation by laser and noble metals of 4-ATP molecules to produce 4,4-dimercaptoazobenzene (DMAB).</p>

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Effects of localized field thermal effect and induced oxidation on SERS spectra of 4-ATP

  • 期刊论文

  • 发表日期：

    2026年7月24日

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  • Jizhe Song,
  • Sujuan Feng,
  • Jiacheng Li,
  • Xiaolong Wang,
  • Dejun Jiang,
  • Xinyue Wang,
  • Guangqiang Liu

摘要

In this study, we measured the surface-enhanced Raman scattering (SERS) spectra of 4-aminothiophenol (4-ATP) using substrates coated with different noble metals paired with multiple wavelengths of laser. After theoretical and experimental studies, we propose a mechanism for the effect of different test conditions on the SERS spectra. For the 532 nm laser, the damage to the molecule and the Au-S bond is primarily attributed to the photothermal effect of the metal. For the 785 nm laser, it is primarily due to the synergistic induction of oxidation by laser and noble metals of 4-ATP molecules to produce 4,4-dimercaptoazobenzene (DMAB).