Surface-Enhanced Raman Scattering Techniques in Semiconductor Materials

Surface-enhanced Raman scattering (SERS) leverages enhancements in Raman signal intensity to detect molecules at trace concentrations. While noble metals have dominated SERS substrates via plasmonic “hot spots”, semiconductors offer tunable electronic structures, chemical stability and biocompatibility, expanding the scope of applications. Recent work has focused on engineering semiconductor morphology, band structure and defect states to amplify SERS signals through both electromagnetic and chemical enhancement mechanisms. Advances include nanostructure design to maximise local electric fields, heteroatom doping to tailor electronic transitions, creation of oxygen vacancies or interlayer modifications to facilitate charge-transfer resonances, and functionalisation strategies to improve analyte–substrate interactions. These efforts have enabled semiconductor substrates to approach or even rival noble metals in enhancement factors, with detection limits down to single-molecule or single-cell levels. The field continues to explore novel materials—from two-dimensional carbon allotropes and metal nitrides to organic semiconductors—while striving for reproducibility, renewability and compatibility with practical sensing platforms.

Research from Nature Portfolio

Surfactant-free microspheres of two-dimensional graphdiyne have been synthesised at liquid–liquid interfaces, yielding hollow structures that exhibit enhancement factors exceeding 10^7 and detection limits near 10^−12 M. The enhanced Raman response is attributed to efficient interfacial charge transfer within the graphdiyne–molecule system, as confirmed by theoretical simulations.

Three-dimensional organic semiconducting films engineered via carbonyl functionalisation demonstrate face-on molecular orientations that strengthen π-interactions and tune a low-lying LUMO. Such films deliver molecule-specific SERS enhancements by optimising chemical enhancement pathways, offering a low-cost platform for high-fidelity detection.

Ultrathin δ–MoN nanosheets synthesised at moderate temperature and pressure show strong plasmonic resonance across visible wavelengths, achieving enhancement factors above 10^6 and sub-nanomolar detection limits. Their high conductivity and stability position them as versatile, non-oxide semiconductor substrates for trace detection.

Research from all publishers

A coupled-resonance strategy in Mo-doped Ta₂O₅ nanorods integrates molecular resonance, photo-induced charge transfer and electromagnetic “gap” effects to produce enhancement factors on the order of 10^7, enabling detection limits near 10^−8 M. This work highlights the synergy between band engineering and nanorod morphology.

An Nd-doped ZnO system reveals that modulation of the probe–substrate interaction via rare-earth ion incorporation can simultaneously enhance Raman scattering and suppress photoluminescence background. Charge-transfer mechanisms are shown to underpin the dual control of signal amplification and fluorescence quenching.

Niobium pentoxide nanoparticles emerge as a promising semiconductor substrate when engineered to support both chemical (photo-induced charge transfer) and electromagnetic enhancements. Enhancement factors exceeding 10^7 rival those of metal nanostructures, demonstrating broad potential in biological and surface science applications.

Surface-Enhanced Raman Scattering Techniques in Semiconductor Materials publication trend

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

Technical terms

Surface-Enhanced Raman Scattering (SERS): Technique that increases Raman signal intensity by exploiting substrate-induced enhancements.

Electromagnetic enhancement: Amplification of local electric fields near nanostructures, often linked to plasmonic resonance.

Chemical enhancement: Increased Raman cross-section due to charge-transfer interactions between analyte and substrate.

Photo-induced charge transfer: Light-driven transfer of electrons between a substrate and adsorbed molecule, boosting Raman scattering.

Oxygen vacancy: A lattice defect where an oxygen atom is missing, altering electronic states to enhance SERS activity.

References

1. Surfactant-free interfacial growth of graphdiyne hollow microspheres and the mechanistic origin of their SERS activity. Nature Communications (2023).
2. Enabling three-dimensional porous architectures via carbonyl functionalization and molecular-specific organic-SERS platforms. Nature Communications (2021).
3. Low temperature synthesis of plasmonic molybdenum nitride nanosheets for surface enhanced Raman scattering. Nature Communications (2020).
4. A Novel Ultra‐Sensitive Semiconductor SERS Substrate Boosted by the Coupled Resonance Effect. Advanced Science (2019).
5. Monitoring the charge-transfer process in a Nd-doped semiconductor based on photoluminescence and SERS technology. Light: Science & Applications (2020).
6. Niobium pentoxide: a promising surface-enhanced Raman scattering active semiconductor substrate. npj Computational Materials (2017).