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<p>Silver nanoparticles were synthesized on glass substrates via pulsed laser deposition at fluences of 2.5 and 8.3 J/cm<sup>2</sup>. The number of laser pulses (300, 600, 900, and 1200) was varied to evaluate its impact on the surface plasmon resonance (SPR) absorption properties of the films. A Langmuir probe was used to characterize the plasma plume, allowing correlation between ion energy/density and nanoparticle features. The results show that both fluence and the number of pulses significantly influence the nanoparticle size, leading to changes in the position and width of the SPR absorption band. Atomic force microscopy revealed spherical nanoparticles with size variations depending on the laser fluence. The potential of these thin films as surface-enhanced Raman spectroscopy (SERS) substrates was investigated using methylene blue as a probe molecule. SERS spectra were collected from the film with the highest SPR intensity in the UV–Vis range, comparing spectra from different regions of the sample.</p>

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Study of Plasmon Resonance Absorption of Pulsed Laser Deposited Silver Nanoparticles

  • 期刊论文

  • 发表日期：

    2025年6月5日

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  • Abril Vázquez-Francisco,
  • M. Flores-Castañeda,
  • Santiago Camacho López,
  • Yasmín Esqueda Barrón,
  • L. P. Rivera,
  • O. Blanco-Alonso,
  • J. G. Quiñones-Galván

摘要

Silver nanoparticles were synthesized on glass substrates via pulsed laser deposition at fluences of 2.5 and 8.3 J/cm2. The number of laser pulses (300, 600, 900, and 1200) was varied to evaluate its impact on the surface plasmon resonance (SPR) absorption properties of the films. A Langmuir probe was used to characterize the plasma plume, allowing correlation between ion energy/density and nanoparticle features. The results show that both fluence and the number of pulses significantly influence the nanoparticle size, leading to changes in the position and width of the SPR absorption band. Atomic force microscopy revealed spherical nanoparticles with size variations depending on the laser fluence. The potential of these thin films as surface-enhanced Raman spectroscopy (SERS) substrates was investigated using methylene blue as a probe molecule. SERS spectra were collected from the film with the highest SPR intensity in the UV–Vis range, comparing spectra from different regions of the sample.