Abstract This experiment addressed the effect of Nickel-doped on dielectric, ac conductivity, and optical properties pure doped Zn (1−x) Ni x O (x = 0, 3 6%) nanostructures. The un-doped Ni-doped ZnO nanostructures were synthesized using co-precipitation. In this paper, frequency-dependent dielectric electrical conductivity examined at various temperatures ranging from 320 K to 460 an LCR meter...

We describe a new synthetic approach to heterogeneous metal-TiO(2) nanomaterials based on conversion of Ti(3+) to hydrous TiO(2) occurring uniquely on the nanostructured metallic surfaces such as Pt, Au, and Ni nanowires and nanoparticles. The TiO(2) growth mechanism was studied by designing an electrochemical cell. A variety of heterogeneous metal-TiO(2) nanostructures, such as segmented meta...

We report the in situ microscopy observation of an unnatural phase of Ni, a highly strained hexagonal close-packed shcpd form which we believe is stabilized by heteroepitaxial growth on the s001d face of MgO. We find that the nanosized hcp nickel islands transform into the normal face-centered cubic structure when the size of the islands exceeds a critical value sabout 2.5 nm thick with a later...

We propose a 'weaving' evolution mechanism, by systematically investigating the products obtained in controlled experiments, to demonstrate the formation of Ni-based 'microflowers' which consists of multiple characteristic dimensions, in which the three dimensional (3D) NiO 'microflower' is constructed by a two-dimensional (2D) nanosheet framework that is derived from weaving one-dimensional (1...

The engineering of hollow nanostructures is a promising approach to addressing instabilities in silicon-based electrodes for lithium-ion batteries. Previous studies showed that a SiOx coating on silicon nanotubes (SiNTs) could function as a constraining layer and enhance capacity retention in electrodes with low mass loading, but we show here that similarly produced electrodes having negligible...

Three dimensional hierarchical nanostructures have attracted great attention for electrochemical energy storage applications. In this work, self-supported TiO2@Ni(OH)2 core-shell nanowire arrays are prepared on carbon fiber paper via the combination of hydrothermal synthesis and chemical bath deposition. In this core-shell hybrid, the morphology and wall size of the interconnected nanoflake she...

The key atomistic mechanisms of graphene formation on Ni for technologically relevant hydrocarbon exposures below 600 °C are directly revealed via complementary in situ scanning tunneling microscopy and X-ray photoelectron spectroscopy. For clean Ni(111) below 500 °C, two different surface carbide (Ni2C) conversion mechanisms are dominant which both yield epitaxial graphene, whereas above 500 °...