Materials Literature
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The role of some anhydride derivatives namely: tetrabromophthalic anhydride, 1,2,4,5-benzene tetracarboxylic anhydride, phthalic anhydride, and maleic anhydride (1-4) as corrosion inhibitors for carbon steel in 0.5 M HCl have been studied using weight loss, potentiodynamic polarization, electrochemical impedance spect…
RF GFET devices have been processed on SiC wafer using Al2O3as a gate oxide. These devices have been characterised with DC, S parameter and high frequency noise measurement (NF50). The noise parameters have been extracted in order to evaluate the graphene material for RF applications. This GFET shows some potentialiti…
A life cycle costing (LCC) is to be performed complementary to the ongoing research on an enhanced supercapacitor pouch cell, in order to provide additional decision support on the best cell chemistry from the economic point of view. Due to the early stage of the project so far merely the production phase is considere…
Surface-enhanced Raman scattering (SERS) spectroscopy is one of the most sensitive tools for the detection of molecules adsorbed on nanometer-sized roughened metal surfaces. Additionally, SERS combines high sensitivity with the observation of vibrational spectra of the adsorbate, giving complete information on the mol…
During the various hydrological periods in 2011, we studied the phytoplankton along an 87-km stretch of the Araguari and Falsino rivers, which are located in the eastern Brazilian Amazon, in the state of Amapá, Brazil, the most ecologically preserved state in the country. In the study area, the aquatic ecosystem is un…
In studying integrated dual damascene hardware at 10 nm node dimensions, we identified the mechanism for Co liner enhancement of Cu gap-fill to be a wetting improvement of the PVD Cu seed, rather than a local nucleation enhancement for Cu plating. We then show that Co “divot” (top-comer slit void defect) formation can…
Encapsulant materials provide protection and electrical isolation of the solar components in photovoltaic (PV) modules from the environment. However, some photovoltaic devices are sensitive to low levels of moisture and the rate of moisture ingress into a module can decrease its performance significantly during the li…
For many subsea HVDC cable systems, the DC current is transmitted through the HV cable in a voltage source converter (VSC) - HVDC scheme. Modulated upon the DC voltage are harmonics, which originate from the switching feature of the VSC stations. The main purpose of this paper is to examine the effect of a superpositi…
Multiphase composites composed of a continuous hydrogenous (polymeric) phase and of neutron absorbing filler particles are attractive candidate materials for the design of light-weight neutron shields. While the characteristic size of the inclusions is traditionally in the micrometer range, we argue that the shielding…
Abstract Ionic compounds containing the polyoxomolybdate anion [Mo 6 O 19 ] 2 - and [(n-C 4 H 9 ) 4 P] + (tetrabutylphosphonium), [(n-C 4 H 9 ) 3 P(n-C 14 H 29 )] + (tributyl (tetradecyl)phosphonium), [Bmim] + (1- butyl-3-methylimidazolium) and [Dbmim]+ (1,2-dimethyl-3-butylimidazolium) cations were prepared and chara…
Polybetaines are the subclass of polyampholytes bearing positive and negative charges within the same monomeric unit. Polybetaines are technologically advanced polymers due to their ionic structure, high dipole moment, mechanical strength and thermal stability. This review represents the progressive growth of polycarb…
Atomic force microscopy ( AFM ), X‐ray photoelectron spectroscopy ( XPS ), and solution analysis by inductively coupled plasma mass spectrometry ( ICP ‐ MS ) were used to investigate the molecular scale processes responsible for the roughening of glass surfaces due to aqueous corrosion. The study of atomically smooth…
Abstract The physicochemical and mineralogical characterization of the <250 μm particle-size fraction from six clay-rich samples from the Sabga deposit (north-west, Cameroon) were carried out to evaluate their potential applications. The major clay mineral is dioctahedral smectite and minor kaolinite is present in…
The energy distributions of the occupied and unoccupied electronic states for copper halides CuCl and CuI have been investigated using X-ray photoemission and absorption spectroscopy with a highenergy resolution on the equipment of the Russian-German beamline for outlet and monochromatization of synchrotron radiation…
Summary Three different grades of Boron Nitride (BN) powder (BN NX1, BN NX5 and BN HCV) having different mean particle size (0.7 to 11 μm) and specific surface area (16 to 40 m 2 · g −1 ) were used as nucleating agents for poly (3‐hydroxybutyrate‐ co ‐3‐hydroxyvalerate) (PHBV) at a fixed concentration of 2 wt %. Polar…
Abstract The crystal structures of the alkali aluminium thiohypodiphosphates M I AlP 2 S 6 (M I = Li, Na) are reported. NaAlP 2 S 6 crystallizes in the orthorhombic space group Fdd 2 (no. 43) with a = 8.0400(2), b = 10.9452(2), c = 20.8801(4) Å, and V = 1837.44(7) Å 3 ( Z = 8). It is isostructural with AgAlP 2 S 6 , w…
According to International Electrotechnical Commission (IEC) technical specification (TS) 60034-18-42, to ensure the insulation system reliability of inverter-fed form wound motors, endurance tests should be performed on formettes to compare new insulation systems with proven ones. IEC TS 60034-18-42 makes reference t…
Abstract Dioctahedral clays from an active continental geothermal system have been studied to assess their usefulness as proxies of paleo-hydrological and thermal conditions in the subsurface. Drill cuttings from Well WK244 in the Te Mihi area of the Wairakei Geothermal Field, New Zealand, were analyzed to determine t…
The problem of corrosive sulfur is extremely well documented in the electrical power industry and to some extent remains a global problem. The presence of corrosive sulfur in transformers is widely reported as a cause of sudden and unexpected failure. Regeneration of transformer oil using a reactivating sorbent in the…
We investigate the fluorescence quenching of Rhodamine 6G (R6G), a well known laser dye with a high fluorescence quantum yield, by as-synthesized graphene oxide (GO) in aqueous solution, which is found to be rather efficient. By means of steady-state and time-resolved fluorescence spectroscopy combined with detailed a…