Materials Literature
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We report on the usage of Carbon Nanowalls (CNW) synthesized by a PECVD process as electrode material for oxygen reduction reaction (ORR). In order to substitute the platinum based catalysts in fuel cells, graphene is a promising candidate. Carbon Nanowalls are a graphene modification with good accessibility and a con…
The morpho‐structural and electrochemical properties of the oxide film formed on the implants surface play a decisive role for the bio‐compatibility of titanium‐based prosthesis. The aim of the present work is to investigate and compare the corrosion behavior of titanium dioxide (TiO2) coated Ti–6Al–7Nb prepared by an…
We present a-Si:H/µc-Si:H tandem solar cells on laser textured ZnO:Al front contact layers. Direct pulsed laser interference patterning (DLIP) was used for writing arrays of one-dimensional micro gratings of submicron period into ZnO:Al films. The laser texture provides good light trapping which is indicated by an inc…
Sulfonated carbons were explored as functionalized supports for Ni nanoparticles to hydrodeoxygenate (HDO) phenol. Both hexadecane and water were used as solvents. The dual-functional Ni catalysts supported on sulfonated carbon (Ni/C-SO3H) showed high rates for phenol hydrodeoxygenation in liquid hexadecane, but not i…
We report a controllable one-step calcination synthesis of NaV 3 O 8 nanobelts, nanorods and microrods. In situ TEM characterization confirms the basic lithiation mechanism of NaV 3 O 8 cathode materials.
Highly ordered Fe2O3 nanotube arrays have been fabricated by a simple and cost effective anodisation method on iron foils in an ethylene glycol solution containing NH4F and H2O. The Fe2O3 nanotube electrodes were characterised by field emission SEM, energy dispersive X-ray spectroscopy and UV–vis absorbance spectra. T…
The effect of bamboo portions and beating revolution on paper made from Gigantochloa scortechinii was determined. The bamboo was pulped using soda- anthraquinone (AQ) pulping comparing two pulping conditions (alkali 15 & 20%, temperature 160 & 170°C) for different bamboo portions consisted of top, middle and bottom. H…
Abstract Poly(methyl methacrylate) was mixed with poly[(vinylidene chloride)‐co‐acrylonitrile] (Saran‐F) and lithium perchlorate in tetrahydrofuran to make polymer blend systems. Solvent‐free membranes with various blend ratios were prepared using a solution casting technique. Impedance analysis was used to study the…
Low-emitting cotton fabric with low infrared emissivity near to 0.795 at the wavebands of 8–14 µm was prepared using mesoporous carbon-aluminum doped zinc oxide (C-AZO) coatings. The effects of binders, the content of C-AZO composites, coating thickness and roughness of fabrics on the infrared emissivity were investig…
We present theoretical scaling and computational analysis of nanostructured free surfaces formed in chiral liquid crystals (LC) and plant-based twisted plywoods. A nemato-capillary model is used to derive a generalized equation that governs the shape of cholesteric free surfaces. It is shown that the shape equation in…
ABSTRACT The ability for polymers and additives to physically mix in many industrial applications is dictated by a combination of kinetic and thermodynamic factors. The presence of moisture may complicate the mixing performance as water can interact at various degrees with each of the components; this depends on the h…
Zonal flows (ZF) play a crucial role in regulating ion temperature gradient (ITG) turbulence. In previous global gyrokinetic simulations [1] using the ORB5 code with the adiabatic electron model, it was observed that long-lived ZF structures, leading to a corrugated transport and temperature gradient pattern, could de…
Ni‐P\nano‐ZrO2composite coatings were obtained on the AISI 304 steel substrate by the electroless method from a bath containing dodecyltrimethylammonium bromide (DTAB). This cationic surfactant prevents ZrO2agglomeration in the bath and affects the ZrO2content in the coating, hence it alters functional properties of t…
We calculate the magnetization of the helical metallic surface states of a topological insulator. We account for the presence of a small sub-dominant Schrödinger piece in the Hamiltonian in addition to the dominant Dirac contribution. This breaks particle-hole symmetry. The cross-section of the upper Dirac cone narrow…
Solidification in a small experimental steel ingot casting was studied using finite element based simulation. Using the model, the phenomenon associated with fluid flow, temperature distribution, mushy zone formation, thermal gradient ahead of solidification front, local solidification time at various instances of sol…
This paper investigated the effect of cell temperature and product species concentration induced by small-jet flame on the power generation performance of Direct Flame Fuel Cell (DFFC). The cell is placed above the small flame and heated product gas is impinged toward it and this system is the simplest and smallest un…
The exciton dissociation, recombination, and charge transport of bulk heterojunction organic photovoltaic cells (OPVs) is influenced strongly by the nanomorphology of the blend, such as the grain size and the molecular packing. Although it is well known that polymers based on amorphous poly(p-phenylenevinylene) (PPV)…
Low-velocity dynamic compression tests were carried out to reveal the failure mechanism and the energy absorption capacity of multilayered woven lattice sandwich panels. Dynamic compression coupled with shear deformation results in typical softening deformation after the peak stress. The load–displacement curve is cha…
Polymer 6, ([trans-Pt(PBu3 )2 (C≡C)2 ]-[Ir(dFMeppy)2 (N^N)](PF6 ))n , (([Pt]-[Ir](PF6 ))n ; N^N = 5,5'-disubstituted-2,2'-bipyridyl; dFMeppy = 2-(2,4-difluoro-phenyl)-5-methylpyridine) is prepared along with model compounds. These complexes are investigated by absorption and emission spectroscopy and their photophysic…
Abstract The lowest drag shape of fixed volume in Stokes flow has been known for some 40 years. It is front–back symmetric and similar to an American football with ends tangent to a cone of $60^{\circ }$ . The analogous convex axisymmetric shape of fixed surface area, which may be of interest for particle design in ch…