Thank you Foder. I've dispersed nano particles in water then dropped it on the porous silicon. After evaporating of water the Ag nanoparticles were located on PSi surface, so Ag particles cannot diffuse in the Si structures. It is like a sprinkle of Ag nanopowder on the PSi surface, how they can...
Metal nanoparticles (Au, Ag, Al or ...) can coat on porous silicon, the particles can be located inside the pores or on the silicon micro/nano structures. By applying this type of coating is there any change in band structure of porous silicon? As I've measured the band gap has changed.