Femtosecond Laser Ablation–Modified Hybrid SERS/SEIRA Substrate with Silver Nanoparticles for High-Sensitivity Analysis

Key Points

• The research aims to enhance the sensitivity of substrate analysis using femtosecond laser modification techniques.
• Utilized femtosecond laser ablation on planar Si/Cr/Ag/SiO2/Ag NPs structure.
• Varied pulse energies from 1.4 to 9.8 nJ during modification.
• Collected Raman and infrared reflectance spectra of malachite green and Pseudomonas aeruginosa.
• Achieved improved sensitivity in the detection of malachite green.
• Modified substrates showed enhanced Raman and infrared spectra for bacteria analysis.