In situ SERS and in situ Raman: deciphering interfacial phenomena and processes

Area of Science:

• Surface Science
• Spectroscopy
• Chemical Analysis

Background:

• Raman and SERS provide vibrational spectral data for surface analysis.
• These techniques are sensitive to molecular electron density, aiding chemical reaction studies.
• Challenges exist in developing in situ SERS substrates and analyzing complex data.

Purpose of the Study:

• To systematically review in situ Raman/SERS principles and advances for surface reaction studies.
• To compile species identifications and spectral features from recent in situ studies.
• To discuss challenges and future perspectives for in situ SERS.

Main Methods:

• Brief introduction to SERS mechanisms and influencing factors.
• Discussion of interfacial phenomena (species transition, electron density, crystalline structure changes).
• Compilation and analysis of reported in situ SERS studies on surface reactions.

Main Results:

• Overview of SERS mechanisms and factors affecting in situ measurements.
• Systematic compilation of species identification and spectral features in surface reactions.
• Identification of interfacial phenomena crucial for in situ SERS analysis.

Conclusions:

• In situ Raman/SERS are powerful tools for detailed surface reaction analysis.
• Further development is needed for robust in situ SERS substrates and data interpretation.
• Future research should integrate advanced computational methods like machine learning for deeper insights.