In a new approach, we have fabricated 6:1 aspect ratio magnetic nanocolumns, 60–250 nm in diameter, embedded in a hard aluminum-oxide/gallium-arsenide (Al2O3 /GaAs) substrate. The fabrication technique uses the highly selective etching properties of GaAs and AlAs, and highly efficient masking properties of Al2O3 to create small diameter, high aspect ratio holes. Nickel ~Ni! is subsequently elec...

Development of a transition metal based catalyst aiming at concomitant high activity and stability attributed to distinguished catalytic characteristics is considered as the bottleneck for dry reforming methane (DRM). This work highlights role modifying zirconia (ZrO2) alumina (Al2O3) supported nickel catalysts using lanthanum oxide (La2O3) varying from 0 20 wt% during methane. The mesoporous w...

This paper presents the results of study nickel-based coatings fabricated by cold gas spraying. In this study, compositions based on Ni, Ni–Cu, Ni–Zn, and Ni–Al2O3/TiC applied to low-alloyed steel bases were investigated. The composition, type powder (mechanical mix or mechanically alloying), thickness varied choose optimal characteristics for recovery, repair procedures, specific applications ...

Aluminium oxide (Al2O3), commonly known as alumina, is a widespread naturally occurring compound that has a broad range of industrial applications. Besides its use as a pigment or abrasive, alumina also plays a vital role as catalyst support for desulfurization or hydrogenation reactions. In the latter case, the active phase on the catalyst often consists of nickel metal nanoparticles. The inte...

In order to reduce greenhouse gas emissions, which are reaching alarming levels in the atmosphere, capture, recovery, and transformation of carbon dioxide emitted methane is considered a potentially profitable process. This transformation, known as methanation, catalytic reaction that mainly uses catalysts based on noble metals such Ru and, although with less efficiency, transition Ni. improve ...

Producing reliable electrical contacts of molecular dimensions has been a critical challenge in the field of molecule-based electronics. Conventional thin film deposition and photolithography techniques have been utilized to construct novel nanometer-sized electrodes on the exposed vertical plane on the edge of a thin film multilayer structure (metal/insulator/metal). Via thiol surface attachme...