Isolating and Probing the Hot Spot Formed between Two Silver Nanocubes

摘要

There has been a renewed interest in surface-enhanced Raman scattering(SERS)after the demonstration of single-molecule detection with substrates made of silver nano-particles.In this system,it is thought that the giant enhancements that allowed for single-molecule detection did not occur homogeneously over the entire substrate.Instead,they occurred only at particular sites,the so-called hot spots.