A. Alessi, S. Agnello, G. Buscarino and F. M. Gelardi Structural properties of core and surface of silica nanoparticles investigated by Raman spectroscopy Journal of Raman Spectroscopy 44
Our Raman investigation on silica nanoparticles with specific surface from 380 to 50 m2g-1 (diameters from 40 to 7 nm) sheds new light on the shell model. The Raman spectrum of the core is essentially the one recorded in nanoparticles with lower specific surface, whereas the spectrum of the surface shell is essentially the one of the nanoparticles with the higher specific surface. These results evidence the differences in the structure and density of these two nanoparticle regions.
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