Surface-Enhanced Raman Spectroscopy Techniques and Applications

Surface-Enhanced Raman Spectroscopy (SERS) has emerged as a transformative analytical tool that combines the molecular specificity of Raman scattering with the high sensitivity afforded by plasmonic and chemical amplification. At its core, SERS capitalises on metallic nanostructures—most commonly composed of silver, gold or copper—to generate localised surface plasmons, leading to intense electromagnetic fields in nanometre-scale gaps or around sharp features known as “hot spots.” Complementary chemical enhancement mechanisms, arising from charge transfer between the substrate and the target molecules, further boost signal strength. Advances in nanofabrication have driven the design of reproducible substrates, ranging from self-assembled nanoparticle arrays and lithographically defined patterns to novel hybrid materials incorporating semiconductors or two-dimensional layers. These efforts have addressed long-standing challenges of uniformity, scalability and stability, paving the way for real-world applications in trace chemical sensing, biomedical diagnostics, environmental monitoring and materials science. Integration with microfluidic platforms and the development of self-cleaning or reusable surfaces have further broadened the practical utility of SERS. Collectively, these developments underscore the global significance of SERS as a versatile, label-free approach for rapid, ultra-sensitive molecular analysis.

Research from Nature Portfolio

Recent studies have introduced a template-guided electrodeposition strategy using porous coordination polymers to produce highly ordered metallic nanopatterns. This method leverages rapid ion transport within the template’s nanochannels to yield robust, reproducible plasmonic films with precisely located hot spots, facilitating sensitive, scalable SERS sensing. Another pioneering work has applied transformation optics to engineer “warped” nanospaces that simultaneously enlarge the volume and magnitude of field enhancement. The resulting platforms achieve broadband, uniform hotspots, enabling single-molecule detection with exceptionally rapid analyte uptake across a wide spectral range. Together, these contributions exemplify the fusion of fundamental plasmonic theory and innovative fabrication to overcome key limitations in hotspot accessibility and uniformity, marking significant strides towards quantitative, high-throughput SERS analyses.

Research from all publishers

A novel manufacturing approach employs magnetic-field-assisted ultrafast laser deposition to assemble ultrafine, densely packed cobalt nanoparticle arrays on surfaces. This green process produces uniform hot-spot networks that enhance Raman signals by up to an order of magnitude, delivering detection limits in the sub-nanomolar regime while demonstrating excellent reusability. In parallel, multiscale cavity architectures comprising molybdenum disulfide films grown on silicon pyramid arrays and decorated with gold nanoparticles have realised self-cleaning, hydrophobic SERS substrates. These structures exploit synergistic light trapping and plasmonic coupling to achieve uniform, high-performance sensing of both organic pollutants and biomolecules in complex mixtures. Foundational work on single-molecule SERS has also advanced the understanding of hot-spot formation at nanorough interfaces, enabling real-time chemical imaging within live cells and offering a route towards intracellular diagnostics with molecular resolution.

Surface-Enhanced Raman Spectroscopy Techniques and Applications publication trend

The graph below shows the total number of articles in surface-enhanced raman spectroscopy techniques and applications across all publications each year (not limited to Nature Index journals).

Technical terms

Surface-enhanced Raman spectroscopy (SERS): Technique that amplifies Raman scattering signals via plasmonic or chemical interactions at nanostructured surfaces.

Electromagnetic enhancement: Increase in Raman signal due to intensified local electromagnetic fields near plasmonic nanostructures.

Chemical enhancement: Signal amplification arising from charge transfer between the analyte and the substrate surface.

Hot spot: Nanometre-scale region of intense electromagnetic field concentration responsible for the greatest signal enhancement.

Enhancement factor (EF): Ratio quantifying the signal amplification achieved by SERS compared with normal Raman scattering.

Metal-organic framework (MOF): Porous coordination polymer used as a template for producing precise nanopatterns.

References

1. Metal-organic framework template-guided electrochemical lithography on substrates for SERS sensing applications. Nature Communications (2023).
2. Broadband single molecule SERS detection designed by warped optical spaces. Nature Communications (2018).
3. Revolutionizing plasmonic platform via magnetic field-assisted confined ultrafast laser deposition of high-density, uniform, and ultrafine nanoparticle arrays. International Journal of Extreme Manufacturing (2024).
4. Hydrophobic multiscale cavities for high-performance and self-cleaning surface-enhanced Raman spectroscopy (SERS) sensing. Nanophotonics (2020).
5. Prospects for plasmonic hot spots in single molecule SERS towards the chemical imaging of live cells. Physical Chemistry Chemical Physics (2015).