SERS Active Surface Based on Au‐Coated Porous GaN

Since the discovery of the surface-enhanced Raman spectroscopy SERS effect on roughened silver electrode surfaces numerous promising substrates have been explored that can be used as efficient SERS-platform. In the last decade broad interest was focused on producing and using nano-structural forms (e.g. nano-columns) as active platforms for immobilization and examination of organic substances. Such platforms, covered by nano-size metal layers (e.g. Au, Ag, Cu), constitutes very sensitive bio-sensors on which different individual organic molecules can be examined by SERS2. Despite the considerable progress that have been made towards improving and optimizing SERS substrates, the fabrication of reproducible SERS platform still remains a challenging task. In this respect a promising approached was described recently, namely the use of porous GaN(3) covered by gold and silver layers.