Materials Literature
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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…
Argatroban is a powerful synthetic anticoagulant, but due to its water-insoluble nature, it is unsuitable for use as a coating material to reduce the thrombogenic potential of natural or tissue-engineered blood-contacting cardiovascular tissues. On the other hand, anionic compounds could adsorb firmly onto connective…
The electronic structure of graphene-graphane superlattices with armchair interfaces is investigated with first-principles density-functional theory. By separately varying the widths, we find that the energy gap ${E}_{g}$ is inversely proportional to the width of the graphene strip and that the gap increases as the hy…
Abstract Abstract. The new arsenato polyxoxvanadate (NH 4 ) 4 [V 12 As 8 O 40 (H 2 O)] · 4H 2 O ( 1 ) was obtained under solvothermal conditions using either a mixture of ethyl ether/H 2 O or ethanol/H 2 O acting as reducing agents. Compound 1 crystallizes in the orthorhombic space group Pnnm with a = 13.6740(3), b =…
Miscibility, crystallization behavior, crystal structure, and microstructure of biodegradable poly(butylene succinate)/tannic acid (PBSU/TA) blends were studied with differential scanning calorimetry, optical microscopy, wide-angle X-ray diffraction, and small-angle X-ray scattering in this work. PBSU and TA are misci…
Zinc oxide (ZnO) nanorods have been synthesized via the arc discharge method. Different cathode materials, graphite and copper, were applied to modulate the morphology and UV & humidity sensing properties of the as-synthesized ZnO nanorods. Compared with ZnO nanorods synthesized by graphite cathode, shorter length…
Adsorption states of tetrathiafulvalene (TTF) on single-crystal zinc oxide (ZnO) surfaces are examined by photoelectron spectroscopy and X-ray absorption spectroscopy utilizing synchrotron radiation light. Comparison of TTF coverages, its adsorption states, and TTF-induced band bending is made among three ZnO surfaces…
In this work, a study of the nematic (N)–isotropic (I) phase transition has been made in a series of odd non-symmetric liquid crystal dimers, the α-(4-cyanobiphenyl-4’-yloxy)-ω-(1-pyrenimine-benzylidene-4’-oxy) alkanes, by means of accurate calorimetric and dielectric measurements. These materials are potential candid…
Abstract The compound (enH 2 ) 6 [HV 16 IV V 2 V O 42 (Cl)] · Cl 2 · 2H 2 O (en = 1,2‐diaminoethane) ( 1 ), was synthesized under solvothermal conditions employing the amine as reducing agent. Compound 1 crystallizes in the orthorhombic space group Pbcn with a = 13.3343(7), b = 22.3697(3), c = 19.8012(11) Å, V = 5906.…
Gold nanostructures of various morphologies, including nanospheres, nanorods, nanoprisms, and thin films, were immobilized on ITO-coated coverslips in order to investigate the response of their scattering to potential. Shifts in the plasmon band obtained by potential-modulated spectroscopic imaging indicated that the…
The stainless steel surface treatment is very important with regard to its pitting corrosion susceptibility. An effect of various types surfacing on pitting corrosion resistance of AISI 304stainless steel is investigated in this work. The samples of the tested material are turned, blasted, peened, grinded and a half o…
The design and tunability of tissue scaffolds, such as pore size and geometry, is crucial to the success of an engineered tissue replacement. Moreover, the mechanical nature of a tissue scaffold should display properties similar to the tissue of interest; therefore, tunability of the foam mechanical properties is desi…
This paper introduces the principle and characteristic of extrusion tapping of internal thread, presents the simplified mechanical model of extrusion tapping firstly. Then generalizes the key technology of extrusion tapping and their influencing law on tapping torque and thread forming quality, such as extrusion tap t…