  There is a high current interest for novel plasmonic platforms and materials
able to extend their applicability into the ultraviolet (UV) region of the
electromagnetic spectrum. In the UV it is possible to explore spectral
properties of biomolecules with small cross section in the visible spectral
range. However, most used metals in plasmonics have their resonances at
wavelengths > 350 nm. Aluminum and rhodium are two interesting candidate
materials for UV plasmonics, and in this work we developed a simple and
low-cost preparation of functional substrates based on nanoporous aluminum
decorated with rhodium nanoparticles. We demonstrate that these functionalized
nanoporous metal films can be exploited as plasmonic materials suitable for
enhanced UV Raman spectroscopy
