Hydrogen storage in MWNT was enhanced ®ia the catalytic acti®ity of NiMgO. The magnitude of the hydrogen to metal ratio for the MWNTrNiMgO system, combined with temperature programmed adsorption and desorption studies, showed hydrogen spillo®er from the catalyst to the carbon surface. Metal doping combined with temperature acti®ation studies showed that both nickel and magnesium are acti®e in t...

Azide ion is an excellent vibrational probe for studying ion-ion and ion-dipole interactions in solutions because its frequency is sensitively dependent on its local environments. When azide ion forms contact ion pairs with cations in dimethylsulfoxide (DMSO), free azide ion and contact ion pairs are spectrally well distinguished in FTIR spectra. Here, we investigated vibrational population rel...

A new ohmic contact scheme for gallium nitride is presented. The use of Nitrideforming metal Over Gallide-forming metal, “NOG”, can modify the thermodynamic activity of N and Ga near the interface. This in turn can modify the near-surface point defect concentrations, particularly the vacancies of Ga and N. The principle of this contact scheme was shown to be consistent with results from Ni/Au, ...

Aluminium, Au, Be, Co, Cr, Cu, Hg, Ir, Ni, Pd, Pt, Rh and Ti represent causes of metal-induced allergic contact dermatitis (ACD) which expresses in a broad spectrum of cutaneous adverse manifestations. The exposure is primarily by skin contact with various items and products such as jewellery and piercing, cosmetics and tattoos, detergents, body implants and dental prostheses. To reduce the gro...

This numerical study examines the importance of self-consistently accounting for transport and electrostatics in the calculaiton of semiconductor/metal Schottky contact resistivity. It is shown that ignoring such self-consistency results in significant under-estimation of the contact resistivity. An explicit numerical method has also been proposed to efficiently improve contact resistivity calc...

Changes in amino acid metabolism during cell death of human myelogenous leukemic cell lines (HL-1, ML-1, KG-1) induced by contact with gold (Au), silver (Ag) or palladium (Pd) were investigated. All three leukemic cell lines consumed glutamine and serine at the highest rate (amounting to 50%-58% and 12%-16% of the total amino acid consumption, respectively). HL-60 cell growth was slightly stimu...

The numerical simulation of problems involving contact with friction between deformable and rigid bodies is highly dependent of the predicted contact conditions, which are continuously changing during the process. In the case of sheet metal forming processes, the forming tools are assumed to behave rigidly, and thus only the definition of the outer surfaces is required for the simulation. This ...