Porous silicon decorated with Au/TiO nanocomposites for efficient photoinduced enhanced Raman spectroscopy.

In this study, we investigated the potential of porous silicon (PSi) modified with Au/TiO nanocomposites (NCPs) as a substrate for photoinduced enhanced Raman spectroscopy (PIERS). One-step pulsed laser-induced photolysis (PLIP) was used to embed Au/TiO NCPs in the surface of PSi. Scanning electron microscopy revealed that adding TiO nanoparticles (NPs) during PLIP led to the formation of predominantly spherical Au NPs with a diameter of approximately 20 nm.