Morphology Effect of Photoconverted Silver Nanoparticles on the Performance of Surface-Enhanced Raman Spectroscopy...

Area of Science:

• Materials Science
• Spectroscopy
• Nanotechnology

Background:

• Surface-enhanced Raman spectroscopy (SERS) is crucial for sensitive chemical analysis.
• Developing high-sensitivity, low-cost SERS substrates remains a significant research challenge.
• Controlling nanoparticle morphology is key to optimizing SERS performance.

Purpose of the Study:

• To fabricate cost-effective SERS substrates with high sensitivity.
• To investigate the effect of silver nanoparticle shape on SERS performance.
• To utilize a simple and affordable method for nanoparticle synthesis and substrate fabrication.

Main Methods:

• Photoconversion of silver nanoparticles using a red-green-blue light-emitting diode photoreactor.
• Formation of a nanoparticle paste and fabrication of SERS substrates via drop-casting under controlled humidity.
• Evaluation of SERS substrate performance using p-aminothiophenol as a Raman probe.

Main Results:

• The study successfully fabricated SERS substrates from photoconverted silver nanoparticles.
• Nanoparticle shape significantly influences Raman intensities and substrate sensitivity.
• Increased particle faces and vertices correlate with enhanced Raman signal and sensitivity.

Conclusions:

• A simple, affordable method for producing high-performance SERS substrates has been demonstrated.
• Optimizing silver nanoparticle morphology is critical for maximizing SERS detection capabilities.
• This approach offers a viable pathway for developing advanced SERS applications.