US Patent 7400395 - Metal coated nanoporous silicon

http://www.freepatentsonline.com/7400395.html

This patent from Intel teaches a substrate useful for Raman spectroscopy based on metal coated nanoporous silicon useful for enhanced molecular detection. Claim 1 reads:


1. A wafer comprising a layer of metal-coated nanocrystalline porous silicon, wherein the metal coating covers substantially the entire exposed surface area of the nanocrystalline porous silicon, and wherein the nanocrystalline porous silicon has a pore size of from 2 nm to 200 nm.