Materials Literature
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Ballistic requirements in the design of military aerospace components are critical for the structural assessment. Although experimental tests remain fundamental, numerical analyses allow us to simulate such a very complex scenario. However, in order to improve the consistency of such simulations, several aspects have…
Chemical modification of porous silicon surface has been investigated to have different physical surface properties. Porous silicon modified with dodecyl functionality exhibits hydrophobic feature, however the oxidation of porous silicon to modify with hydroxyl group displays hydrophilic properties. Surface characteri…
New method to encode multiple photonic features of Bragg type reflector on silicon wafer has been investigated. Multiple bit encodes of distributed Bragg reflector features have been prepared by electrochemical etching of crystalline silicon by using various square wave current densities. Optical characterization of m…
Green composites constitute a loosely defined family of materials which are obtained from renewable resources and are degradable through action of living organisms. These materials offer a possible alternative to traditional non-biodegradable materials where recycling is unpractical or not economical. Renewable source…
Cubic boron nitride (cBN) particles coated with 20 wt% nanocrystalline TiN were prepared by coating the surface of cBN particles with TiO2, followed by nitridation with NH3 gas at 900 degrees C. Coating of TiO2 on cBN powders was accomplished by a sol-gel process from a solution of titanium (IV) isopropoxide and anhyd…
Generic industry aims to produce safe, efficient, built-in quality medicines that will satisfy patients’ requirements and will be competitive on the market. In this paper, assessment of the need for quality by design (QbD) and process analytical technology (PAT) implementation by generic industry was made, by analysis…
A new method for creating a honeycomb texture has been found. It uses a directly printed inkjet mask and isotropic wet chemical etching through it. A special printing pattern has been designed so that structures smaller than the droplet diameter could be printed. After etching it yields a hexagonal honeycomb texture w…
Antimicrobial packaging, an active packaging concept, can be considered challenging technology that could have a significant impact on food safety of meat and meat products. The feasibility of polylactic acid (PLA)-based film was evaluated for its application as a material for antimicrobial film. A bio-based commercia…
The distribution of flelds travelling in the laminated structure with assumed values for the tangential components of the magnetic fleld intensities on the top and bottom surfaces of the structure, has been obtained using linear electromagnetic fleld theory. The treatment takes cognizance of interlaminar capacitance i…
Nanoporous pseudo-carbon paste electrode (Nano-PPCPE) was fabricated by mixing polystyrene (PS) microspheres as the template, graphite powders as the filler, pyrrole as the precursor of polymer which actually acted as the paste. After the polymerization of pyrrole catalyzed by Fe3+, the PS microspheres were removed to…
The supramolecular assembly of a non-luminescent cationic platinum complex with an amphiphilic block copolymer bearing free carboxylic acid moieties leads to a turn-on of red phosphorescence due to the formation of luminescent platinum complex aggregates guided by the carboxylic acid groups. This principle enables pre…
The effect of hydrogen on ZnO while annealing at 1100 °C with Zn vapour or Ti metal is studied. ZnO turns red only when hydrogen is present in combination with oxygen deficiency. The coloration is reversible at 1100 °C by removing hydrogen either by evacuating or by gettering hydrogen with Ti at low temperature while…
Synthesis of nanocrystals that exhibit strong upconversion (UC) luminescence upon infrared excitation has been challenging due to the stringent control needed over experimental variables. Herein, we report a method to synthesize nanocrystals demonstrating high UC at room temperature in aqueous solution on graphene.
A transition in the mechanism and kinetics of slow crack growth (SCG) is described in this paper. Itresembles well-knownductile-brittle transitionin dynamic impact resistance and referred to asductile-brittle transition of second kind (DBT2). There is acorresponding transition temperature (TT2). A discontinuous, stepw…
Steel elbows are used in petrochemical facilities and power plants. In the case of an earthquake event, in addition to other service loads, they are subjected to strong repeated cyclic structural loading that may lead to failure due to cyclic accumulation of plastic strain or collapse. Furthermore, due to their flexib…
An experimental bench test was conducted to evaluate the catalytic ignition of gaseous hydrogen and oxygen mixtures at low temperature by injection of cold gas mixtures on the catalytic microreactor. The selected supports for this study were cylindrical monoliths; i.e., cordierite honeycomb (600 channels per square in…
Desiccant air conditioning and humidity control systems, which utilize the water adsorption/desorption by porous materials, have attracted much attention as an environment-friendly and energy-efficient air conditioning system. Micelle-templated mesoporous silicas (MPS), which have been extensively studied in recent ye…
Microbial redox reactions of inorganic sulfur compounds are one of the important reactions responsible for the recycling of this element to maintain the environmental sulfur balance. These reactions are carried out by phylogenetically diverse set of microorganisms. The sulfur oxidizing gene cluster (sox) of thermo-neu…
A model of thermomechanical processes of composite thin-walled shells at high temperatures with account for thermodestruction effects has been developed. The model allows for interlayer and transverse stresses in the shell and variation of composite properties in heating. A numerical method has been developed for solu…
We report the deposition of NiO onto ZnO nanowires prepared on ZnO:Ga/glass templates. With the sputtered NiO, the nanowires became mushroom-like. Experimental results point out that sputtered NiO also formed nanoshells surrounding ZnO nanowires. The p-NiO/n-ZnO heterostructure exhibits rectifying behavior with a shar…