Surface-enhanced Raman spectroscopy on laser-engineered ruthenium dye-functionalized nanoporous gold

- Photothermal laser processing is used to modify the surface structure of nanoporous gold.
- Laser-fabricated structures exhibit pore sizes in the range from 25 nm to 200 nm and higher.
- Ru-dye-functionalized surface structures are used in surface-enhanced Raman spectroscopy (SERS) studies.
- Raman peak intensities of N719, a commercial Ru-dye, exhibit a strong dependence on the pore size.
- Maximum Raman peak intensities are observed for small pore sizes close to 25 nm.