zno nanowires with a diameter of 70 nm and nanorods with a diameter in the range of 100-150 nm and two micrometer in length were grown on glass substrates by resistive evaporation method and applying a two step oxidation process at low temperatures, without using any catalyst, template or buffer layer. xrd pattern of these nanostructures indicated a good crystallinity property with wurtzite hex...

double layer zno/sno2 thin film resistive gas sensors were fabricated by successive pvd of those oxides onto porcelain substrates. the metallic contacts were provided by electron beam evaporation of platinum onto substrates prior to deposition of the gas sensitive layers. deposits were thermally annealed at different temperatures. it was shown that the activation energy of electrical conduction...

ZnO nanowires with a diameter of 70 nm and nanorods with a diameter in the range of 100-150 nm and two micrometer in length were grown on glass substrates by resistive evaporation method and applying a two step oxidation process at low temperatures, without using any catalyst, template or buffer layer. XRD pattern of these nanostructures indicated a good crystallinity property with wurtzite hex...

in the . The Two-sourced evaporation technique is used to prepare hard ZnSe films by controlling the evaporation rates o Zn and Se at substrate temperature of 400 1C. The films are doped with Cu by immersion in the Cu(NO3)2 solution for different periods of time. The XRD has not shown a drastic change in the film structure while the ele resistivity of the deposited film dropped from 10O-cm to a...

X-ray flares belong to magnetic activity phenomena that are characteristic for T-Tauri stars. The relatively strong magnetic fields of T-Tauri magnetospheres can be regarded as the primary energy source for the flares. The energy can be converted to particle acceleration and plasma heating by reconnection events in twisted flux tubes that connect the central object and the circumstellar disk. C...

Fullerenes, a new form of carbon, were discovered in 1985 [1] in graphite vaporization under inert gas at low pressure. Fullerenes have many properties different from either diamond or graphite. Potential applications include superconductors, sensors, catalysts, optical and electronic devices, polymer composites, high-energy fuels and biological and medical materials. But wide application of fu...

We show that, in tantalum oxide resistive memories, activation power provides a multi-level variable for information storage that can be set and read separately from the resistance. These two state variables (resistance and activation power) can be precisely controlled in two steps: (1) the possible activation power states are selected by partially reducing resistance, then (2) a subsequent par...