Thus, the development of semiconductor materials will introduce a new epoch for SERS-based research. Semiconductor-based SERS has the potential to enrich SERS theory and applications. In recent years, SERS research based on semiconductor materials has attracted significant attention because semiconductor materials have advantages such as repeatable preparation, simple pretreatment, stable SERS spectra and superior biocompatibility, stability, and reproducibility. Noble metal nanostructures have been commonly used as SERS-active substrates due to their strong local electric fields and relatively mature preparation, application, and enhancement mechanisms.
SERS activity is believed to be closely related to the LSPR and charge transfer (CT) of the material. Due to its remarkable sensitivity in trace detection, SERS has gained prominence in the fields of catalysis, biosensors, drug tracking, and optoelectronic devices. The coupling of nanomaterials induces local surface plasmon resonance (LSPR), which contributes greatly to SERS. Surface-enhanced Raman scattering (SERS) is a very important tool in vibrational spectroscopy.
