Materials Literature
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Conventional wisdom dictates that the band gap and energy levels of a conjugated polymer are primarily determined by the molecular structure of the conjugated backbone, while the solubilizing alkyl chains should have a negligible impact on these properties. Hence the side chains should have minimal impact on the short…
Gentamicin is an aminoglycoside antibiotic widely used against infections by Gram-negative microorganisms. Nephrotoxicity is the main limitation to its therapeutic efficacy. Gentamicin nephrotoxicity occurs in 10-20% of therapeutic regimes. A central aspect of gentamicin nephrotoxicity is its tubular effect, which may…
We present a strategy to solve the high-resolution structure of amyloid fibrils by solid-state NMR and use it to determine the atomic-resolution structure of the prion domain of the fungal prion HET-s in its amyloid form. On the basis of 134 unambiguous distance restraints, we recently showed that HET-s(218-289) in it…
Proteins can sample conformational states that are critical for function but are seldom detected directly because of their low occupancies and short lifetimes. In this work, we used chemical shifts and bond-vector orientation constraints obtained from nuclear magnetic resonance relaxation dispersion spectroscopy, in c…
The development of a high-efficiency TiO 2 photocatalyst is of great importance to a variety of solar light conversion and application fields; the desired high efficiency can be achieved by employing well-controlled TiO 2 nanoarchitectures. In this study, we have successfully synthesized well-ordered and aligned high…
In order to fabricate and enhance the composites with dielectric functions, printed circuit boards (PCBs) were made from polytetrafluoroethylene (PTFE) gel after curing with 350°C. SiO 2 and Al 2 O 3 nanopowders were used as the fillers and PTFE was the matrix used to fabricate the composites. A proposed stirring mach…
By using a processing of gas-cooling and roll pressing (GCRP), the temperature, strain and stress of isotactic polypropylene (iPP) sheets can be controlled and both β-modification and α-modification can be found in the sheets. The tensile strength of sheet in longitudinal direction increased by 14.1% at most, tensile…
Descaling of oil and gas well pipes has proved to be a major problem to oil and gas companies, as scale formation significantly reduces well productivity and costs the industry millions of pounds a year. Current scale removal methods involve the use of chemicals, which can be harmful to the environment and mechanical…
Abstract The coating of cotton fiber is used in the textile industry to increase the mechanical resistance of the yarn and their resistance to vibration, friction, impact, and elongation, which are some of the forces to which the yarn is subjected during the weaving process. The main objective of this study was to inv…
Abstract Different routes to prepare gradient nanowire and nanotubes are presented including the use of polymeric and metal nanoparticles. In the case of electrospinning, latex particles have been added to electrospinning solution. The properties of the fibres have been studied theoretically and experimentally. In the…
Abstract The effects of the molar ratio of adipic acid to total diacid on the phase morphology and thermal properties of nylon copolymers containing dimer acid, adipic acid, and hexamethylenediamine were investigated. A significant structural transition from the γ form to α and β mixture forms occurred with increasing…
Abstract The aim of our experiments was the production of helically coiled carbon nanotubes selectively. The influence of catalytic particles prepared by ball milling (dry and wet method) was investigated on the growth of coiled carbon nanotubes under CVD conditions. For qualitative characterization of carbon deposit…
We investigated the efficient optical excitation transfer in layered quantum dot structures by introducing a network of optical near-field interactions. With a density-matrix-based formalization of interdot near-field interactions, our theoretical approach allows systematic analysis of layered CdTe quantum dot systems…
The temperature dependence of the Raman spectrum of a gelatin-based composite material doped with single-walled carbon nanotubes (SWNT@gelatin) is reported. A significant upshift of the G-mode frequency is observed when the temperature is decreased from room temperature to 20 K. This frequency shift is significantly s…
This paper presents a modification to the conventional vapor diffusion (hanging- or sitting-drop) technique for protein crystallization screening. In this modified method, the reservoir solution is replaced with a desiccant to allow for a larger range of protein solution concentrations, thereby providing more opportun…
This research aims to study the effects of degradation on mechanical, physical, and morphological properties of empty fruit bunch (EFB) fiber- reinforced polyester composites. The unsaturated polyester resin has been used to produce thermoset polymer composites. The reinforcing effect in composites was evaluated at va…
Abstract We used electron spin resonance (ESR) to analyze several kinds of single‐walled carbon nanotubes (SWNTs) synthesized by different methods. We observed that ESR is a sensitive probe that can be used to observe major differences between samples of carbon nanotubes (CNTs), in relation to their proportion of magn…
Abstract The suitability of different types of telechelic poly(lactic acid) (PLA) copolymers for dilactide production and prepolymer products was evaluated. L ‐lactic acid ( L ‐LA) was copolymerized with 1,4‐butanediol, pentaerythritol, adipic acid, or 1,2,3,4‐butanetetracarboxylic acid (1,2,3,4‐BTCA). The influence o…
Abstract We investigated the synthesis and structure–property behaviors of two types of vegetable‐oil polyols (soy oil and castor oil) and their use in viscoelastic (VE) polyurethane foams (PUFs). This article is the first in a two‐part series. In this initial part, we principally address the dynamic mechanical analys…
Molecular adsorption of nitroaromatic molecules on single-walled carbon nanotubes (NTs) was investigated using state-of-the-art ab initio calculations and conductivity measurements. In the calculations we considered both armchair and zigzag NTs of several diameters and treated adsorption both on pristine sidewalls and…