Scalable Fabrication of Highly Ordered Au/Ag Composite Nanoshell Array for Ultrasensitive SERS Detection of Trace Pesticides
Surface-enhanced Raman scattering is highly promising for trace molecular detection but requires substrates with both ultrahigh sensitivity and macroscopic uniformity. Current bimetallic nanostructures struggle to achieve large-area structural reproducibility and high-density “hot spots” due to the lack of precise spat...