Surface modification of nanoporous alumina layers by deposition of Ag nanoparticles. Effect of alumina pore diameter on the morphology of silver deposit and its influence on SERS activity

- Magnetron sputtering of Ag is a suitable method of producing a SERS-active substrate.
- Morphology of nanoporous substrate is crucial in the resulting of SERS activity.
- Free Ag-NPs act as surface nanoresonators for pyridine molecules.