SERS Nanorod Arrays for Rapid Viral Detection

The patent transforms the detection approach by changing the physical parameter measured from biochemical reactions (ELISA, PCR) to optical scattering properties (Raman spectroscopy). This parameter change enables direct detection of biomolecules based on their inherent optical signatures, eliminating the need for time-consuming amplification or labeling steps while maintaining high sensitivity through the use of nanostructured substrates that enhance Raman signals.

The patent replaces complex biochemical systems (enzymes, polymerases, fluorescent reporters) with a purely optical detection system. By substituting mechanical and biochemical amplification mechanisms with optical enhancement through nanostructures, the system achieves rapid detection without the cumbersome procedures associated with conventional methods.

The patent applies local quality by creating specific functional zones on the nanorod surfaces through controlled deposition. Different regions of the nanorod array can be optimized for different functions (e.g., enhanced Raman signal generation versus biomolecule binding), allowing simultaneous achievement of high sensitivity and reproducibility by optimizing local surface properties rather than relying on uniform roughened surfaces.

The patent employs composite materials by combining metal nanorods (for Raman enhancement) with controlled surface coatings or functional layers. This composite structure maintains the optical enhancement properties of the metal while providing a more controlled and reproducible interface for biological molecule interaction, reducing the variability inherent in purely roughened metal surfaces.