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The structural-phase state of the ion-modified surface layer of the VT-23 titanium samples was investigated by TEM and SEM. The results of the surface modification of the VT-23 titanium alloy by the intense flux of copper ions with energy of 2 keV and the ion current density of 3.5 mA/cm² were studied. The dependence of the microhardness and the penetration depth of ions as a function of duration of ion treatment was determined. The microhardness was investigated by the nanoindentation method. [ABSTRACT FROM AUTHOR]

This work concentrates on the study of catalyst and buffer layer effects on growth of carbon nanowalls (CNWs) on glass substrates that coated with various metal nanocatalysts and/or buffer layers using hot filament chemical vapor deposition (HF-CVD) technique. A combination of C2H2/NH3/H2 renders the growth of carbon nanostructures (carbon nanowalls). Parameters affecting the growth of the CNWs such as C2H2 flow ratio, deposition time, and substrate temperature are investigated. Low temperature plasma is applied for deposition of the Fe and Al thin films as nanocatalyst and/or buffer layer on the glass substrate. Surface morphology of the substrate is observed using the atomic force microscopy (AFM) technique, while the thicknesses were measured by means of Rutherford back scattering (RBS) technique. The samples utilized are characterized by the scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Raman spectroscopy techniques. One of the important conclusions in this work is that the increasing of the substrate temperature from 600° C to 700° C caused to the increasing of the crystallite size of the CNWs that were grown on the Fe and Al nanocatalysts. It is also determined that, deposition of the Al nanolayer under the Fe naocatalyst as a buffer layer caused to the increasing of the crystallite size of the CNWs that were grown on the Fe nanocatalyst. [ABSTRACT FROM AUTHOR]

We reported a single step process for the synthesis of Ni having wire, sponge and flower type microstructures that are obtained via a microwave-assisted decomposition of Ni-TEA (triethanolamine) complex precursor with and without amino acid. The products formed at different stages of the growth process were characterized using scanning electron microscope (SEM), transmission electron microscope (TEM) and magnetometer. Morphological modification enhanced the coercivity from 40 Oe for the Ni-wire to 120 Oe for the Ni-flower with exchange bias effect, which mechanistically arises due to the presence of NiO phase. [ABSTRACT FROM AUTHOR]