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Xu Y.,Tianjin Normal University | Wang C.,State Mine Support Products Quality Supervision and Inspection Center | Chen D.,Key Laboratory for Special Functional Aggregate Materials | Jiao X.,Key Laboratory for Special Functional Aggregate Materials
Materials Letters | Year: 2010

Nanostructured CuO film was prepared using glass or stainless steel slices as substrate via a simple ammonia-assisted solution route at 60 °C. The obtained CuO film was made up of well-crystallized nanosheets of 50-360 nm in thickness and 0.7-4.5 μm in width. The reaction time and the substrate have significant effects not only on the thickness, width, arrangement of the nanosheets but also on the morphology and the thickness of the films. The CuO film was characterized by SEM, TEM, XRD, IR, and Raman spectroscopy techniques. © 2009 Elsevier B.V. All rights reserved. Source


Ji B.,Key Laboratory for Special Functional Aggregate Materials | Chen D.,Key Laboratory for Special Functional Aggregate Materials | Jiao X.,Key Laboratory for Special Functional Aggregate Materials | Zhao Z.,Key Laboratory for Special Functional Aggregate Materials | Jiao Y.,Key Laboratory for Special Functional Aggregate Materials
Materials Letters | Year: 2010

Nanoporous barium titanate with high specific surface area was prepared from co-gel precursors through solvothermal method followed by supercritical drying. The samples were accumulated by BaTiO3 nanoparticles with excellent crystallinity. The BaTiO3 obtained at 60 °C exhibited a high BET surface area of 117 m2/g. The porosity reduced with the increasing solvothermal temperature. Raman spectra indicated that the solvothermal-synthesized BaTiO3 was composed by both cubic phase and tetragonal phase. The relations between dielectric properties and the porosity of the samples were also investigated. The introduction of pores reduced the dielectric constant obviously. The dielectric constant of the obtained sample increased with the decrease of the porosity. © 2010 Elsevier B.V. All rights reserved. Source

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