Materials Literature
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This paper presents graphene nanoribbon (GNR) Schottky diode through an analytical approach. To achieve an analytical relation for channel current, first an analytical equation for potential distribution within the GNR is offered. Then by using the WKB approximation, transmission probability through Schottky barriers…
Rice husk silica (RHS) which was obtained with thermal treatment of rice husk has the size of approximately 10 micrometer with 4-5 nm pore. RHS can be mold to a disk type membrane. The membrane may have submicron pore originated from the space among the particles, and the nano pores of the rice husk silica (RHS pore).…
The paper discusses the correspondence between electromagnetic boundary conditions and interface conditions. In particular, the focus is on the synthetic approach where the interest is in finding material realizations for given boundary conditions. Material realizations are approximative but not unique because, especi…
This work studied the effect of nanoporous alumina in acute cellular response in an in vivo model. Nanoporous alumina membranes, with pore size diameters of 20 and 200 nm, were fabricated by anodic oxidation of aluminium. The membranes were thereafter characterized in terms of pore size distribution and chemical compo…
In order to prepare transparent hybrid films of high refractive index, nanoparticles of TiO2 were prepared and dispersed in a silicone epoxy (SE) resin synthesized from diphenyl silane diol and [2-(3,4-epoxycyclohexyl)ethyl] trimethoxysilane by sol-gel reactions. It was found that amorphous TiO2 nanoparticles of about…
We report the direct measurement of individual grain boundary (GB) resistances and the critical role of GB structure in the increased resistivity in copper nanowires. By measuring both intra- and inter-grain resistance with a four-probe scanning tunneling microscope, large resistance jumps are revealed owing to succes…
Crucial sensor parameters like sensitivity, response time and recovery time at low ppm were studied and analysed by photoluminescence (PL) quenching technique. A comparison was drawn from various porous silicon samples prepared under different electrochemical anodization conditions. Porosity dependent sensing results…
This work claims that VO2, of interest currently for its metal-insulator phase transition properties, is also a ferroelectric material. Using a VO2film sandwiched between two silicon dioxide layers, memory transistor structures with substantial and useful properties have been fabricated. Threshold voltage shifts are o…
The spectral and luminescent characteristics of neodymium(III) carboxylate complexes with different nitrogen- and phosphorus-containing neutral ligands were studied and the relationship between the intensity of luminescence and the composition of the coordination sphere was established. The most intensive luminescence…
Co2+ doped ZnO nanoparticles (NPs) using PEG as a capping agent were prepared by colloidal wet-chemical method. The structure, morphology and characteristics of as-prepared samples were investigated. X-ray diffraction patterns studies revealed wurtzite crystal phase. STM-TEM micrographs show a spherical shape and near…
A new method is proposed for measuring the chemical composition of grain boundaries (GBs) in copper-based alloys not prone to embrittlement of boundaries. This method is based on embrittlement of copper GBs by bismuth penetrating from the gas phase of bismuth telluride (Bi 2 Te 3 ). Chemical analysis of the GB surface…
Hollow polyelectrolyte capsules have recently attracted a wide interest as a new class of drug delivery vehicles. They can be fabricated by means of the Layer by Layer technique which is simple, and versatile and allows the obtainment of programmable shell composition, diameters, thickness, and permeability. Hollow ca…
Bio-based epoxy/clay nanocomposites were prepared by swelling organoclay in an epoxy (DGEBA)/linseed vinyl ester fatty amide (LVEFA), followed by curing with an aromatic hardener, 4,4′-diaminodiphenylmethane (DDM). The X-ray diffraction showed the existence of intercalated clay in the polymer matrix. Differential scan…
The thermoplastic polyurethane elastomer (TPU) was firstly synthesized by using polybutylene adipate (PBA) as soft segments, methane-4-4’-diisocyanate(MDI) and 1,4–butanediol(BDO) as hard segments. The polyurethane hot-melt adhesive was then prepared by adding the tackifying resin, filler and other auxiliaries into th…
The surface reaction of isotactic and syndiotactic polypropylene (I-PP and S-PP) films with ozone was studied with FT-IR spectroscopy with differential scanning calorimetry (DSC) and making use of 2,2,4-trimethylpentane as a model compound of PP chain segment. I-PP and S-PP were found reactive toward ozone, and it was…
For a theoretical derivation of bubble coalescence conditions, nonlinear forced oscillations of two closely spaced spherical bubbles subjected to the action of a periodic external pressure field are considered. The equations, asymptotic with respect to a small distance between the bubble surfaces, are derived to descr…
We report the effect of oxygen stoichiometry on the photovoltaic properties of miscut managanite La0.4Ca0.6MnO3-δ epitaxial films. The oxygen content was changed by annealing the sample alternately between oxygen and vacuum annealing. With the decrease of oxygen deficiencies, the electrical conductivity increases and…
Mechanical and physical properties, such as tensile strength, elongation at break, modulus of elasticity, Shore D hardness, melt flow rate (MFR), and electrical and thermal conductivities of composites with high density polyethylene matrix reinforced with Al powders were investigated experimentally. Measurements of th…
Two-dimensional numerical computation of the structure-dependent spectral response in a 4H-SiC metal—semiconductor—metal ultraviolet photodetector with consideration of reflection and absorption on contact electrodes, , , , ,
The level of energy deposition on future inertial fusion energy (IFE) reactor first walls, particularly in direct-drive scenarios, makes the ultimate survivability of such wall materials a challenge. We investigate the survivability of three-dimensional (3-D) dendritic materials fabricated by chemical vapor deposition…