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Oxygen reduction on carbon cryogel-supported Pt nanoparticles in acid media
(Materials Science Forum, 2006)
The kinetics of oxygen reduction (ORR) on carbon cryogel supported Pt nanoparticles (Pt / C) in acid solution was studied using the rotating disk electrode technique. This electrocatalyst OF was prepared by a modified ...
Many-body calculations of dynamic polarizability, reffractive index and verdet coefficient
(Materials Science Forum, 2006)
Within the framework of the many-body theory by using the Random Phase Approximation with Exchange (RPAE) method we calculated the frequency dependent polarizability, refractive index, and Verdet coefficient of some atoms. ...
Influence of carbon concentration and rotational temperature on fullerene yield in RF reactor
(Materials Science Forum, 2006)
In this paper, report on fullerene formation in a radio-frequency (RF) thermal plasma reactor has been presented. In order to determine the degree of evaporation of the graphite precursor used, analysis of SEM micrographs ...
Surface modification of titanium by high intensity ultra-short Nd : YAG laser
(Materials Science Forum, 2006)
The effects of an Nd:YAG laser interaction with titanium target using laser radiation at wavelengths 1.064 or 0.532 mu m (40 picoseconds pulse duration) were studied. Modification of target surfaces at laser energy densities ...
Molecular modeling of new dioxomolybdenum(VI) complexes with heteroalicyclic dithiocarbamates. In silico models for metal-implant coating within living systems
(Materials Science Forum, 2006)
A huge variety of nano-objects, allowing specific reactions at well-defined positions can be generated using oxo-molybdenurn compounds based building blocks and fragments. On the other side, the use of suphur-based interfaces ...
Structural, electronic and optical properties of some oligo-phenylenes
(Materials Science Forum, 2006)
Using semi-empirical quantum mechanic (AMI, ZINDO/S) and ab-initio Hartree-Fock (HF) calculations we investigated selected structural, electronic and vibrational properties of phenylene-based oligomers from biphenyl P2P ...
Surface characteristics and modification of different carbon materials
(Materials Science Forum, 2006)
In this work, surface characteristics of different carbon materials were investigated. The materials under consideration were: activated carbon, carbon monolith, carbon felt and glassy carbon (powder, plate and broken ...
Electrooxidation of hydrogen on nanostructured Pt/C catalysts for polymer electrolyte fuel cells
(Materials Science Forum, 2006)
Mesoporous carbon cryogel synthesized by sol-gel polycondensation and freeze-drying with specific surface area (BET) of 517 m(2) g(-1) was used as a catalyst support. Pt/C catalysts were prepared by a modified ethylene ...
Structural and dielectric properties of BaTi1-xSnxO3 ceramics
(Materials Science Forum, 2006)
BaTi1-xSnO3 (BTS) powders, with x ranging from 0 to 1, were synthesized by solid-state reaction technique. The powders were pressed into pellets and sintered at 1370 and 1420 T. The structural characterization of sintered ...
Gamma radiation effects on mechanical properties of carbon/epoxy composites
(Materials Science Forum, 2006)
Unidirectional and angle-ply carbon/epoxy laminates were gamma irradiated up to doses of 12 and 20 MGy. Composites with two different, low and high temperature epoxy matrices have been submitted to irradiation and subsequent ...