Ce doped BaTiO3 1D-nanostructures prepared by colloidal chemistry

Reference Presenter Authors
08-046 Adelina C IANCULESCU IANCULESCU, A.C.(University "Politehnica" of Bucharest, Bucharest, Romania); STANCIU, C.A.(University "Politehnica" of Bucharest, Bucharest, Romania); VASILE, B.S.(University "Politehnica" of Bucharest, Bucharest, Romania); NICOARA, A.(University "Politehnica" of Bucharest, Bucharest, Romania); TRUSCA, R.(University "Politehnica" of Bucharest, Bucharest, Romania); CERNEA, M.(National Institute of Materials Physics, Romania); TRUPINA, L.(National Institute of Materials Physics, Romania); The preparation by colloidal chemistry and the characteristics of Ce3+-doped BaTiO3 nanotubes and nanowires with the nominal formula Ba0.95Ce0.05Ti0.9875O3 were described. Porous polycarbonate membranes with channels diameter of 100 nm and 200 nm, were used as templates. The uncalcined nanotubes of 100 nm show an average outer diameter of ~86 nm and an average wall thickness of 9 nm, while, the uncalcined nanoshell tubes of 200 nm show ~186 nm and 12 nm, respectively. Crystalline Ce-doped BaTiO3 nanotubes obtained after thermal treatment in air, at 700°C/ 1h, exhibit a diameter of 157 nm, higher porosity and larger grains ~38 nm and crystallites of 6 – 9 nm, than the nanotubes with diameter of 77 nm, which show grain size of 20 nm and crystallites of 3 – 5 nm. Uniform, uncalcined wires with diameter of about 81 nm were produced by the same method. After calcination in similar conditions the amorphous 1D-structures were converted into crystalline nanowires, with a diameter of 60 nm. PFM investigations indicated ferroelectric and piezoelectric characteristics for all the Ba0.95Ce0.05Ti0.9875O3 nanotubes/nanowires prepared in this study.
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