Nanoparticle-Enhanced Raman Spectroscopy Techniques

Nanoparticle-enhanced Raman spectroscopy encompasses a suite of methods that exploit the strong electromagnetic fields generated by plasmonic nanostructures to amplify the inherently weak Raman scattering of molecules. By tailoring nanoparticle composition, shape and surface chemistry, signal enhancements of several orders of magnitude can be achieved, enabling the detection and identification of trace species under ambient or operando conditions. Core–shell architectures, anisotropic particles and magnetic–plasmonic hybrids have extended applicability to catalytic reaction monitoring, environmental sensing and biomedical diagnostics. Beyond classical surface-enhanced Raman scattering, specialized approaches such as shell-isolated nanoparticle-enhanced Raman spectroscopy (SHINERS) and electrochemical surface oxidation enhanced Raman scattering (EC-SOERS) provide unprecedented access to interface chemistry on electrode surfaces and within complex matrices. Together, these advances offer a versatile, label-free platform for real-time structural characterisation and mechanistic insight across chemistry, materials science and the life sciences.

Research from Nature Portfolio

Seminal work on shell-isolated nanoparticle-enhanced Raman spectroscopy has established a generalised strategy for in situ tracking of heterogeneous catalytic processes. By decorating catalyst surfaces with silica-coated gold nanoparticles, researchers have achieved ultrahigh surface sensitivity and stability under reaction conditions. Combined with density functional theory, this approach has directly observed adsorbed intermediates—including superoxide and metal-carbon species—during low- and high-temperature oxidation reactions. The methodology has proven broadly applicable to diverse metal catalysts and provides a robust framework for elucidating structure–activity relationships in operando.

Research from all publishers

A recent investigation into electrochemical surface oxidation enhanced Raman scattering has elucidated the role of chloride ions in the formation of active silver oxide substrates. By coupling dark-field microscopy with operando Raman measurements, it was shown that optimal chloride concentrations generate AgCl nanocrystals without passivating the electrode, ensuring reproducible signal enhancement. This mechanistic insight transforms substrate preparation from empirical to knowledge-driven design.

Shell-isolated nanoparticle-enhanced Raman spectroscopy has also been leveraged to interrogate electrocatalytic pathways in sustainable energy conversion. Studies on nickel-catalysed hydrogenation and CO₂ reduction reveal transient intermediates and surface speciation across a range of potentials. The versatility of SHINERS enables application to non-noble systems and complex electrolytes, advancing the understanding of reaction kinetics and selectivity under realistic operating conditions.

In the field of biochemical analysis, advances in plasmonic substrate engineering have delivered ultrasensitive detection of biomolecules in bodily fluids. Novel composite materials, including metal–dielectric nanocomposites and nanoparticle-decorated films, yield high enhancement factors and low background. These substrates support multiplexed assays for proteins, nucleic acids and metabolites, paving the way for rapid, point-of-care diagnostics without labelling requirements.

Nanoparticle-Enhanced Raman Spectroscopy Techniques publication trend

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

Technical terms

Surface-enhanced Raman scattering (SERS): A technique in which plasmonic nanostructures concentrate electromagnetic fields to amplify Raman signals of nearby molecules by several orders of magnitude.

Shell-isolated nanoparticle-enhanced Raman spectroscopy (SHINERS): A variant of SERS in which plasmonic nanoparticles are coated with an ultrathin inert shell, preventing direct contact with the sample while preserving field enhancement.

Electrochemical surface oxidation enhanced Raman scattering (EC-SOERS): A method that generates Raman-active substrates through controlled electrochemical oxidation of metal surfaces in the presence of specific ions, yielding dynamic signal enhancement.

Operando spectroscopy: Measurements performed under actual working conditions of a system to capture real-time changes in structure and chemistry during a reaction.

References

1. In situ dynamic tracking of heterogeneous nanocatalytic processes by shell-isolated nanoparticle-enhanced Raman spectroscopy. Nature Communications (2017).
2. The Role of Chloride in Raman Signal Enhancement by Electrochemical Silver Oxidation Revealed by Dark Field Microscopy. Analytical Chemistry (2025).
3. In Situ Shell‐Isolated Nanoparticle‐Enhanced Raman Spectroscopy of Nickel‐Catalyzed Hydrogenation Reactions. ChemPhysChem (2020).
4. Fe3O4-protected gold nanoparticles: New plasmonic-magnetic nanomaterial for Raman analysis of surfaces. Applied Surface Science (2021).
5. Plasmonic substrates for biochemical applications of surface-enhanced Raman spectroscopy. Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy (2023).