Materials Literature
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A small amount of high molecular weight molecules can have a dramatic influence on the flow‐induced crystallization kinetics and orientation of polymers. To elucidate the effects of the high molecular weight component under a real processing process, we prepared model blends in which high density polyethylene with a h…
You might think all glasses are the same—that they are all viscous amorphous materials somewhere between solids and liquids. In fact, many glass-forming liquids fall into two categories: “strong” and “fragile.” As the temperature T is reduced, the viscosity of strong glasses like SiO2 increases as exp(∆/T ), where ∆ c…
This work investigates the symmetry properties of single-wall carbon nanotubes and their structural analogs, which are nanotubes consisting of different kinds of atoms. The symmetry group of a nanotube is studied by looking at symmetries and color fixing symmetries associated with a coloring of the tiling by hexagons…
The dynamics of two- and five-disk systems confined in a square has been studied using molecular dynamics simulations and compared with the predictions of transition state theory. We determine the partition functions Z and Z(‡) of transition state theory using a procedure first used by Salsburg and Wood for the pressu…
Material models are widely used in finite element codes for analysis of material deformations particularly at high strain rates and elevated temperatures. The problems such as necking and bulging limit the conventional test techniques to measure the stress–strain curves only up to small strains. This is while in some…
This paper describes a facile approach to a biomimetic rapid fabrication of ultrathin silica nanotubes with a highly uniform diameter of 10 nm and inner hollow of around 3 nm. The synthesis is carried out through a spontaneous polycondensation of alkoxysilane on polyamine crystalline fibrils that were conveniently pro…
Fluorine-doped tin oxide (FTO) films with a thickness of about 3 micrometers were prepared by electron cyclotron resonance-metal organic chemical vapor deposition (ECR-MOCVD) under 800 W of microwave power, with tetra-methyl tin (TMT) as a tin precursor. The dome-shaped micro-patterned FTO layer was prepared on a copp…
The band profile and electronic properties of Zn-polar ZnMgO/ZnO heterostructures are investigated using self-consistent calculations of the Schrödinger, Poisson, and charge balance equations for 300 K, all based on the assumption that the two-dimensional electron gas (2DEG) originates from donor-like surface states o…
Abstract Novel degradable biomedical materials are found to have huge potential applications in fields such as drug delivery and release, orthopedic fixation support and tissue engineering. Utilization of polymers as biomaterials has greatly impacted the advancement of modern medicine. In this review, some new degrada…
Gold Nanoparticles successfully applied for detection of Chlorpyrifos pesticide present in various water samples. Structural and morphological studies of Gold Nanoparticles were studied following UV-Visible Spectrophotometer, SEM and HRTEM. Trisodium Citrate has been used as a reducing agent. The author successfully a…
A reversible vapochemical and mechanochemical solid-state transformation between a dppe-linked SFe3Cu2-based cluster [{(μ3-S)Fe3(CO)9}Cu2(dppe)] (2) and its 1D polymer [{(μ4-S)Fe3(CO)9}Cu2(dppe)(MeCN)2]n (3) was demonstrated, in which polymer 3 exhibited semi-conducting properties with an energy gap of 1.69 eV.
Nanotechnology is the study of the controlling of matter on an atomic and molecular scale. Generally nanotechnology deals with structures of the size 100 nanometers or smaller in at least one dimension, structural features are intermediate in between isolated atoms and bulk materials, in the range of 10 -9 to 10 -10 m…
Current saturation in graphene field-effect transistor (GFET) is of significant importance to improve the maximum oscillation frequency (fmax). We investigated the direct current (dc) and radio frequency (rf) characteristics of a heavily p-type doped GFET based on chemical vapor deposition grown material. The drain cu…
In 2006, the overwhelming majority of radiologists including myself were shocked by the news that a contrast agent, that most of us believed was very safe, could cause nephrogenic systemic fibrosis (NSF). NSF is a delayed adverse contrast reaction which may cause severe disability and even death. Within two years, it…
The dynamic properties of the dipolar magnet CsGd(MoO4)2 have been studied. The frequency and temperature dependence of the AC susceptibility investigated in the paramagnetic region above 2 K revealed the co-existence of magnetic field induced slow and fast relaxation channels with a timescale differing by three order…
Controlling aligned fiber micro-architectures to simulate the extracellular matrix for inducing important biological functions is a key challenge with regard to successful tissue regeneration. Here we present a bottom-up microemulsion-mediated strategy to obtain highly bioactive and biocompatible, striped Ce–TiO2 nano…
Pseudo-binary oxide semiconductor alloy films of (1-x)ZnO-x(AgGaO2)1/2 were fabricated using a conventional rf-magnetron sputtering. The wurtzite-type single phases were obtained in the wide composition range of x ≤ 0.33 because the terminal β-AgGaO2 that corresponds to the composition with x = 1 possesses a wurtzite-…
Samples of 321 stainless steel from both the parent and welded section of a thin section tube were subjected to accelerated ageing to simulate long term service conditions in an advanced gas cooled reactor (AGR) power plant. The initial condition of the parent metal showed a duplex microstructure with approximately 50…
Abstract Three novel kinds of linear silicon‐containing hybrid polymers with Si−C≡C units were synthesized by polycondensation reactions using the Grignard reagent method. All the polymers were thermosetting, highly heat‐resistant, moldable and easily soluble in common organic solvents. The structure, curing behavior,…
It is widely acknowledged that ceramic armor experiences an unsteady penetration response: an impacting projectile may erode on the surface of a ceramic target without substantial penetration for a significant amount of time and then suddenly start to penetrate the target. Although known for more than four decades, th…