Materials Literature
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Abstract Titanium dioxide (TiO2) is a unique material that can be used as an excellent photocatalyst, hence it will be very useful to solve the current world pollution problem. For photocatalytic application, the cold spray process, which uses supersonic high velocity technique at moderate temperature is considered to…
Ti-rich Mg1ЎxTi1+xO3 samples were synthesized by solid-state reaction. Sampleswere characterized by room temperature x-ray powder di®raction, scanning electron microscopyand energy dispersive spectroscopy of x-rays. Hexagonal lattice parameters a and c increasedwith increasing Ti content. Time-of-Flight-Secondary-Ion-…
Simple and up-scalable production of carbon nanotubes (CNTs) still remains difficult with current production methods. Plasma enhanced chemical vapour deposition (PECVD) provides an excellent method for producing high purity and large amounts of carbon nanotubes. This work demonstrates how PECVD can be used to tailor t…
Influence of developed technology of integrated processing (vibration treatment with the following chrome plating) is specified. Videlicet, the linear relationship between the force indentation, radius of deforming element and the thickness of chromium.
Novel low-angle bent molecules with 1,7-naphthalene central core and alkylthio tails form the hexagonal columnar phase as well as the well-known B4 phase. The columnar phase has a large two-dimensional hexagonal lattice of 65–70 Å and exhibits the antiferroelectric switching with the spontaneous polarization along the…
Tailoring rheological properties of colloidal suspensions with the adsorption of polyelectrolyte multilayers (PEMs) is based on the idea of controlling macroscopic mechanical properties by modifying the particle surface in a reproducible and well-understood manner. With layer-by-layer self-assembly, monodisperse polys…
A portable fibre optic dosimeter has been developed that uses transparent fluroperovskite dosimeters at the end of a multimode polymer fibre. It uses two stimulation sources that take advantage of the bimodal trap distribution so that the dose rate and cumulative dose can be monitored. Photoluminescence (PL), opticall…
The settling of marine diatoms Amphora coffeaeformis onto a photocatalytic titanium dioxide surface was monitored by ATR-IR. Attachment of the diatoms via their mucilaginous secretions was monitored via observation of protein amide I and II linkages, carboxylate linkages from a uronic acid polysaccharide, and sulfate…
Abstract Recent developments in hybrid low pressure thermal spray technologies such as Plasma Spray-Thin Film (PS-TF), PS-PVD, PS-CVD are being increasingly used to develop functional inorganic coatings and films for emerging high end energy applications. The requirements of such coatings and films are more highly spe…
We report on room temperature electroluminescence (EL) from n–n isotype heterostructures composed of Al-doped graded-band-gap Zn 1− x Mg x O (g-ZnMgO : Al) and ZnO films fabricated on Pt/Ti/SiO 2 /Si substrates. The isotype heterostructure device generated EL emission at operation voltages as low as 3–5 V, whose emiss…
The structure of kapok fiber was characterized using FTIR and <TEX>$^{13}C$</TEX>-NMR spectrometers, elemental analyzer, x-ray diffractometer, SEM and IMT I-Solution ver 7.5. The kapok has a hollow tube shape and is composed of cellulose I with crystallinity of 47.95%. To develop novel oil-sorbent materials necessary…
Solid-state welding takes place during the extrusion of hollow shapes and tubes made from selected metals such as aluminum and magnesium and their alloys. DEFORM TM is one of the most frequently used FEM software packages to analyze the metal flow in deformation processes. However, it has some limitations while applie…
Bio-ethanol based fuel cell is an energy source with a promising future. The low temperature solid oxide fuel cell fed by direct bio-ethanol is receiving considerable attention as a clean and highly efficient for the production of both electricity and high grade waste heat. The comparison of fuel cell performance with…
The effect on morphological, spectroscopic, and thermal properties of oil palm empty fruit bunch fibers (OPEFB fibers) and oil palm frond fibers (OPF fibers) following treatment and modification with sodium hydroxide and succinic anhydride, respectively, were investigated. The evidence of treatment was observed by wei…
We carry out a theoretical investigation of the recently reported M(smif)(2) series1,2 and find a number of interesting phenomena. These include complex potential energy surfaces with near-degenerate stationary points, low-lying states, non-trivial electron configurations, as well as non-innocent ligand behavior. The…
The self-consistent field theory (SCFT) is applied to the microphase separation of concentrated solutions of weakly charged polyelectrolytes. The generalized Poisson–Boltzmann equation describing the electrostatic interactions at the mean-field level is numerically solved by a full multigrid algorithm, which enables o…
We report the structural and electrical properties of ion beam sputtered ZnO films vacuum annealed at varying temperatures. XRD results revealed that the films grow along the c -axis. The crystallite sizes increase from ~8 to ~30 nm upon annealing at 800 º C. Annealing aided to recover the compressive strain and regai…
Dispersed single-walled carbon nanotubes (SWCNTs) reduce cytochrome c (Cyt- c ) when simply mixed in Tris buffer. Atomic force microscopy, Raman spectroscopy, and UV–vis absorption spectroscopy show that SWCNTs are individually dispersed and are highly n-doped in Tris buffer, which accounts for the reducing ability. B…
The photoenhancement effect of the band-edge photoluminescence in ZnO nanocrystals dispersed in ethanol is investigated by observing changes in optical properties after ultraviolet illumination. Time-resolved measurements at 20 K reveal that the band-edge luminescence is composed of two components and the enhancement…
Single layers of Zn x Cd 1− x Se with various compositions ( x = 0.39, 0.52, 0.59, 0.69 and 0.8) were prepared by thermal vacuum evaporation. Consecutive deposition of films from ZnSe and CdSe with equivalent thickness of 0.12, 0.25 or 0.37 nm was applied and the composition was varied by alloying ZnSe and CdSe films…