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Incorporation of zirconia and germania and ternary compounds of ZrO2-GeO2 into silica sol-gel matrices

Gurin V. S., Alexeenko A. A., Kasparov K. N., Tyavlovskaya E. A.

Materials Science Poland

2005

Vol. 23, No. 1

49--60

Silica sol-gel glasses were doped with zirconia and germania. Nanoparticles composed from these oxides and the binary oxides Zr-Ge-O were produced within the matrices. XRD, TEM, and XPS studies were used to determine the phase composition and energy of the electronic states of the elements. The optical features of the materials were chracterized by UV/Visible absorption and photoluminescence. Nanoparticles of ZrGeO4 and Zr3GeO8 within the solid matrices were fabricated for the first time.

An Incorporation of copper and its oxides and chalcogenides into silica sol-gel materials

Gurin V. S., Alexeenko A. A., Prakapenka V. B., Kovalenko D. L., Yumashev K. V., Prokoshin P. V.

Materials Science

2002

Vol. 20, No. 2

29-37

Recent results concerning fabrication and optical features of the metal- and semiconductornanoparticles doped sol-gel are reviewed. The nanoparticles of copper, copper oxides, sulfides and selenides have been produced by means of the modified silica-based sol-gel technique within the two types of materials: amorphous silica films and monolithic glasses. The features of the optical absorption are discussed in dependence on the chemical composition. Optical properties are varied with element composition of the compounds, size of particles, their concentration, etc. The quantum confinement and partial surface chemical modification of the nanoparticles are considered as possible reasons for appearance of optical features at the copper multivalent compounds.