Silica-based (Greensilica®) particles were sol-gel synthesized(under hydrothermal catalysis) with four different compositions:SiO2, amine-SiO2, diamine-SiO2and epoxy-SiO2, and within eachcomposition with two inorganic/organic silica precursors’ ratios(9:1 and 7:3) (Table 1).