Tin dioxide nanoparticles embedded in silica matrix were fabricated by ion implantation combined with thermal oxidation. Silica substrate was implanted with a 150 keV Sn(+) ions beam with a fluence of 1.0 x 10(17) ions/cm(2). The sample was annealed for 1 h in a conventional furnace at a temperature of 800 C under flowing O(2) gas. According to the structural characterization performed by X-ray diffraction and transmission electron microscopy techniques, metallic tetragonal tin nanoparticles with a volume average size of 12.8 nm were formed in the as-implanted sample. The annealing in oxidizing atmosphere promotes the total oxidation of the tin nanoparticles into tin dioxide nanoparticles with a preferential migration toward the surface of the matrix, where large and coalesced nanoparticles were observed, and a small diffusion toward the bulk, where smaller nanoparticles were found.

Synthesis and characterization of SnO(2) nanoparticles embedded in silica by ion implantation

BELLO, VALENTINA;PELLEGRINI, GIOVANNI;MATTEI, GIOVANNI;MAZZOLDI, PAOLO;
2010

Abstract

Tin dioxide nanoparticles embedded in silica matrix were fabricated by ion implantation combined with thermal oxidation. Silica substrate was implanted with a 150 keV Sn(+) ions beam with a fluence of 1.0 x 10(17) ions/cm(2). The sample was annealed for 1 h in a conventional furnace at a temperature of 800 C under flowing O(2) gas. According to the structural characterization performed by X-ray diffraction and transmission electron microscopy techniques, metallic tetragonal tin nanoparticles with a volume average size of 12.8 nm were formed in the as-implanted sample. The annealing in oxidizing atmosphere promotes the total oxidation of the tin nanoparticles into tin dioxide nanoparticles with a preferential migration toward the surface of the matrix, where large and coalesced nanoparticles were observed, and a small diffusion toward the bulk, where smaller nanoparticles were found.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/145733
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