Development of new functional optical materials based on the ordered ensembles of monodisperse semiconductor and metal nanocrystals (NCs) is an actual problem. One of the effective methods of formation of NCs ensembles is template synthesis which allows to control density of filling of the modified substrate (template) by nanocrystals and provides the high uniformity of their sizes. To present day the prevention of isolated nanocrystals aggregation on substrates at ensembles formation is one of the unsolved problems. The purpose of the present work is to obtain the ensembles of isolated gold NCs in an environment from silicium dioxide with controlled thickness by the template synthesis method on the modified substrates (glass, quartz). The ensembles of monodisperse gold NCs in diameter of 20 nanometers in an environment from silicium dioxide with thickness 5 - 100 nanometers are synthesized. The characterization of NCs ensembles (structure, sizes, optical properties) was done by methods of electronic diffraction, photoelectronic and optical spectroscopy, electronic microscopy. It is established, that Au NCs have FCC crystal structure with lattice parameters, corresponded to bulk gold. It is shown, that creation of the protective environment from silicium dioxide prevents the aggregation gold nanocrystals on a substrate. The absorption spectra of the ensembles of Au NCs with an SiO2 shell with thickness 5-15 nanometers are characterized by a maximum of plasmonic resonance peak at the 540 nanometers. The increase of shell SiO2 thickness leads to peak broadering and shifting in long-wave region. Thus, changing the thickness of SiO2 shell it is possible to verifying the optical properties of nanostructures studied.

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