Super-Resolution Surface-Enhanced Raman Scattering: Perspectives on the Past, Present, and Future

Area of Science:

• Nanotechnology
• Spectroscopy
• Microscopy

Background:

• Far-field optical microscopy has inherent resolution limits.
• Plasmonic nanoparticle aggregates create electromagnetic hot spots.
• Surface-enhanced Raman scattering (SERS) amplifies weak molecular signals.

Purpose of the Study:

• To review the advancements and challenges in super-resolution SERS.
• To explore the mapping of single-molecule SERS hot spots.
• To identify future opportunities in the field of super-resolution SERS.

Main Methods:

• Localizing SERS signals from single or few molecules.
• Utilizing plasmonic nanoparticle aggregates for signal enhancement.
• Comparing SERS super-resolution with fluorescence-based techniques.

Main Results:

• Super-resolution SERS enables nanoscale resolution imaging.
• It allows determination of relationships between signal origin, field enhancement, and intensity.
• Current state-of-the-art techniques are discussed.

Conclusions:

• Super-resolution SERS offers unique capabilities for nanoscale investigations.
• Challenges remain in achieving optimal performance and broader application.
• Further research can advance the field and its applications in various scientific domains.