Preparation of M/TiO2 (M = Au, Pt) nanocomposite films using co-sputtering method

https://doi.org/10.1016/S0965-9773(99)00171-3Get rights and content

Abstract

Au/TiO2 and Pt/TiO2 nanocomposite films were deposited on quartz glass substrates by the co-sputtering method. As-deposited Pt/TiO2 andAu/TiO2 nanocomposite films consist of amorphous nanoparticles of Pt, Pt-Ti-O or PtO2 in amorphous TiO2−x and crystallized Au nanoparticles in amorphous TiO2−x, respectively. The chemical states of Pt in as-deposited Pt/ TiO2 nanocomposite films were strongly dependent upon the content of Pt in the nanocomposites. The heated Au/TiO2 andPt/TiO2 nanocomposite films were composed of Pt metal and Au metal nanoparticles in the matrix of rutile-type TiO2, respectively. Both Pt and Au nanoparticles in the nanocomposite films inhibit the formation of anatase-type TiO2 during heat treatment.

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    Citation Excerpt :

    In the particular context of embedded and supported metal NPs, much research work has been focused on exploring both solution- and vapor-phase approaches, as well as on the influence of the matrix surface in directing the nano-unit nucleation and subsequent organization [136]. Up to date, M′/MxOy-based nanocomposites have been synthesized by several chemical and physical routes, including CVD [70,137], SG and impregnation [8,14,35,36,57,89,97,118,138–153], wet chemical methods and layer-by-layer self-assembly [8,13,20,27,71,77,93,154–160], ion beam-assisted techniques [11,55,56,103,161,162], ion implantation [55,76,163–165], combined thermal and electron beam deposition [166], evaporation [4,33,34,92,167–171], sputtering [2,40,53,73,75,79,94–96,101,102,105,113,116,172–180] and joint sputtering/PE-CVD [181]. An attractive bottom-up preparation strategy for the synthesis of M′/MxOy nanocomposites is the SG process [182–184], a versatile low-temperature approach from the liquid to the solid-state [57,118,142,143,185–194].

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