Materials Literature
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Recently, transition-metal-doped semiconductor nanostructures, so-called diluted magnetic semiconductors, such as dots, rods, wires, and films, have been the subject of intense research efforts due to their fascinating properties and potential applications in bioimaging, spintronics, and quantum interference informati…
Carbon nanotubes (CNTs) are frequently used as torsional devices in nanoelectromechanical systems; thus it is necessary to gain a thorough understanding of the mechanical behavior of tubes under torsion. In this paper, molecular dynamics simulations are carried out to investigate the torsional buckling of single-walle…
Abstract Low‐temperature catalytic dehydrogenation of H 3 Ga · NMe 3 and a bicyclic guanidine [1,3,4,6,7,8‐hexahydro‐2 H ‐pyrimido[1,2‐ a ]pyrimidine (hppH) or 1,5,7‐triazabicyclo[4.3.0]non‐6‐ene (Htbn)] led to temperature‐sensitive gallium hydrides H 3 Ga(tbn) · Htbn and [H 2 Ga(μ‐hpp)] 2 . Both hydrides, which are s…
A macroscopic system of single-walled carbon nanotubes (SWNTs) created by a novel DNA/protein complex-assisted assembly is investigated. Due to a point-like nature of connectors, the resulting SWNT aerogel represents a network of self-suspended nanotubes with a record-low density of less than 0.75 mg cm(-3). The assem…
Mullite-based glass-ceramics were produced from aluminium hydroxide sludge resulting from the anodisation process and waste glasses. Phase development for crystallisation of amorphous mullite was investigated between 900°C and 1200°C. The kinetic parameters such as activation energy of crystallisation and Avrami expon…
We use molecular dynamics (MD) to simulate diffusion in molten aluminum-copper (AlCu) alloys. The self-diffusivities and Maxwell-Stefan diffusivities are calculated for AlCu mixtures using the Green-Kubo formulas at temperatures from 1000 to 4000 K and pressures from 0 to 25 GPa, along with additional points at higher…
This study presents a method for one-step formation of poly(ethylene oxide) nanofibers incorporating nanoparticles of a poorly water-soluble compound. Using the new method reported here, nanofiber-nanoparticle composites are fabricated in one step by electrospinning of an oil-in-water microemulsion, in which a model m…
In this research, the effect of nano zinc oxide (ZnO) and conventional ZnO on cross-linking densities of natural rubber (NR)/butadiene rubber (BR) and NR/styrene–butadiene rubber (SBR) blends was investigated. The cross-linking densities of blends were determined using swelling behavior technique. Blends of NR/BR and…
Abstract Laser melt electrospinning is a novel technology to produce micro/nanofibers. This solvent‐free process is more suitable for biomedical applications. In this work, the electrospun poly( L ‐lactide) (PLLA) fibers with diameters ranging from 2 to 7 μm were prepared by this method, and four influencing factors o…
The influence of new oxide film defects generated during mould filling on the mechanical strength and reliability of magnesium alloy castings (AZ91) has been investigated. The filling behaviour was evaluated using an optical video camera. Three point bend tests were conducted on specimens cut from the cast plates. The…
Abstract We demonstrate surface‐initiated activators generated by electron transfer atom‐transfer radical polymerization (SI‐AGET ATRP) of methyl methacrylate (MMA) and tert ‐butyl acrylate ( t ‐BA) on activated carbon (AC), and polyacrylic acid (PAA) graft AC (AC@PAA) is obtained after hydrolysis of poly( tert ‐butyl…
Abstract A new dissolving process (two‐step dissolving process), that is, cellulose was first swelled to the maximum in aqueous 1‐butyl‐3‐methylimidazolium chloride ([BMIM]Cl) solution, and then dissolved by stirring under vacuum to remove excessive water, was developed to prepare the cellulose/[BMIM]Cl spinning dope…
Abstract The melt processing and the tensile mechanical properties of composites consisting of 30 wt% softwood kraft pulp cellulose fibers and ethylene‐acrylic acid copolymer (EAA) with 7% acrylic acid content were studied. The compounding techniques used were extrusion mixing performed with a single screw extruder an…
This paper investigates the buckling behavior of piezoelectric nanowires under distributed transverse loading, within the framework of the Timoshenko beam theory, and in the presence of surface effects. Analytical relations are given for the critical force of axial buckling of nanowires by accounting for the effects o…
A ternary stannide of sodium and magnesium, Na(2)MgSn, was synthesized from the elements, and the crystal structure was determined by single-crystal X-ray diffraction. The compound crystallizes in the Li(2)CuAs structure type (hexagonal, P6(3)/mmc, Z = 2, a = 5.0486(11) Å, c = 10.095(2) Å), and its structure is built…
The failure of a cross-sectional 65 nm-thick copper and 150 nm-thick niobium multilayer thin film was investigated via an in situ transmission electron microscopy straining experiment. The fracture of the free-standing multilayer films was associated with confined dislocation slip within layers containing and precedin…
In this study, we synthesized a series of amphiphilic dumbbell-shaped dendrimers through the addition reactions of a hydrophilic poly(oxyalkylene) with hydrophobic dendrons based on 4-isocyanate-4'-(3,3-dimethyl-2,4-dioxo-azetidine)diphenylmethane with different numbers of branching generations. The addition reaction…
We performed ab initio density-functional-theory calculations to investigate the adsorption of molecular hydrogen on pristine and Al-doped hydrogen-passivated zigzag graphene nanoribbons (GNRs) using nonlocal van der Waals functionals that have recently been proposed for an accurate description of exchange and correla…
The electrical conductivity and dielectric properties of xB 2 O 3 –(40− x ) Fe 2 O 3 –60 P 2 O 5 ( x = 0–20, mol%) glasses have been investigated by impedance spectroscopy in the frequency range from 0.01 Hz to 1 MHz and over the temperature range from 303 to 523 K. The dc conductivity is strongly controlled by polaro…
The development of biomaterials endowed with bioactive features relies on a simultaneous insight into a proper terminal sterilization process. FDA recommendations on sterility of biomaterials are very strict: a sterility assurance level (SAL) of 10(-6) must be guaranteed for biomaterials to be used in human implants.…