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The sol-gel silica glasses doped with copper selenide nanoparticles werestudied through small-angle neutron scattering (SANS) and transmission electronmicroscopy. SANS intensities demonstrate the complicated dependence on thescattering parameter (transferred momentum within the framework of thistechnique), however, with no pronounced peaks throughout the full q interval.The multi-component power-law-exponential model was applied for theapproximation and evaluation of the scattering objects sizes at differentlevels. Also, fitting to the mono-exponential fractal model was elaborated forSANS data. From the results of both simulations we derive the sizes of Cu2Separticles about 60nm and the noticeable modification of the glass matrix at thescale of the one order more (the long-range effect of particles upon theglass). The fractal dimension of the above scattering objects is varied from1.5 through 4.2 indicating the formation of complex structure'particle-in-glass' which may not be reduced to a simple model of singleparticles in solid matrix.

Structural studies of the sol-gel glasses with copper selenide nanoparticles by SANS technique