Materials Literature
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In preparation for ITER, JET has been upgraded with a new ITER-like wall (ILW), whereby the main plasma facing components, previously of carbon, have been replaced by mainly Be in the main chamber and W in the divertor. As part of the many diagnostic enhancements, a new, survey, visible spectroscopy diagnostic has bee…
Abstract Two theoretical models describing photoelectron transport in multilayer samples were developed: (i) the Monte Carlo simulation strategy, in which the photoelectron elastic scattering events are accounted for, and (ii) the common x-ray electron spectroscopy (XPS) formalism adjusted to multilayer systems, in wh…
Liquid crystalline main-chain polymers based on a repeat hexaalkoxytriphenylene moiety have previously been made by the reaction of dihydroxytetraalkoxytriphenylenes with α,ω-dibromoalkanes catalysed by caesium carbonate in N-methyl pyrrolidone. We now show that the molecular weights of these polymers can be increased…
Abstract In this work, about 1 wt% of different functionalized carbon nanotubes (CNTs), namely CNTCOOH (CNT with carboxylic groups), CNTNH 2 (CNT with amine groups) and CNTOH (CNT with hydroxyl groups), as well as nonfunctionalized CNTs were incorporated into a phenoxy resin via a melt mixing process. The extent of…
Abstract Effects of titanium dioxide (TiO 2 ) dosage in polyurethane (PU) coating and PU coating thickness on solar reflectance, surface adhesion, crack resistance to bending, and thermal conductivity of wood/(natural rubber) (WNR) composite sheet were studied before and after prolonged UV aging. The TiO 2 powder cont…
The structure sensitivity of n -heptane dehydrocyclization has been evaluated on Pt nanoparticles as a function of Pt particle size. Pt particles were vapor-deposited onto a SiO 2 surface in ultrahigh vacuum (UHV) and then run under near-atmospheric pressures (495 Torr) by transferring the samples in situ to a batch r…
We studied the effects of isoelectronic Ru substitution at the Fe site on the energy gaps of optimally F-doped SmFeAsO by means of point-contact Andreev-reflection spectroscopy. The results show that the SmFe_(1-x)Ru_(x)AsO_(0.85)F_(0.15) system keeps a multigap character at least up to x =0.50, and that the gap ampli…
A quantum mechanical model of two interacting electrons in graphene is considered. We concentrate on the case of zero total momentum of the pair. We show that the dynamics of the system is very unusual. Both stationary and time-dependent problems are considered. It is shown that the complete set of wave functions with…
Porous silicon microcavity (PSiMc) structures were used to immobilize the photosynthetic reaction center (RC) purified from the purple bacterium Rhodobacter sphaeroides R-26. Two different binding methods were compared by specular reflectance measurements. Structural characterization of PSiMc was performed by scanning…
Based on the Weibull statistical distribution and the thickness effect on dielectric breakdown strengthEBD, a formula to evaluate the reliability of solid insulation structures (SISs) in pulsed power systems is derived. By calculating this formula, it is concluded that an increase of 1.4 times in the dielectric thickn…
Amorphous SiO 2 films were deposited by means of an electrospray technique. The relation between the water contact angle (WCA) of the deposited SiO 2 films and the surface morphology is investigated. The feeding rate of the electrospray process greatly affects the morphology of the synthesized SiO 2 films. There is al…
Abstract Two binary polyimide (PI) blends having a common monomer, diamine and dianhydride, were prepared. The first system was composed of PIs obtained from an alicyclic and flexible dianhydride, namely 5‐(2,5‐dioxotetrahydrofurfuryl)‐3‐methyl‐3‐cyclohexene‐1,2‐dicarboxylic acid anhydride (DOCDA) and two aromatic dia…
[meso-Triaryl-21,23-didehydro-23H-5-oxaporphyrinato](trifluoroacetato)zinc(II) was prepared by the reaction of meso-triarylbilindione with acetic anhydride and zinc acetate, and it was isolated as a trifluoroacetate salt. The X-ray crystallographic study demonstrated that the trifluoroacetate anion was coordinated to…
Abstract Poly(methyl methacrylate) (PMMA)/montmorillonite (MMT) nanocomposites were prepared by a new one‐pot technique, where the hydrophilic Na‐MMT layers were decorated with hydrophobic 1‐dodecyl‐3‐methylimidazolium hexafluorophosphate (C12mimPF6) ionic liquid in situ during melt blending with PMMA and intercalatio…
PII proteins are central signal processing units for the regulation of nitrogen metabolism in bacteria, archaea and plants. They act in response to cellular energy, carbon and nitrogen availability. The central metabolites ATP, ADP and 2-oxoglutarate, which indicate cellular energy and carbon/nitrogen abundance, bind…
We perform computer simulations to explore the suprastructures and their formation mechanism in the length-dependent assembly of a stiff polymer chain on the carbon nanotube surface. Three types of local conformations, that is, helical wrapping along the nanotube threadline, nonhelical loop, and straight extension alo…
Covalent functionalization of diameter sorted SWCNTs with porphyrins (MP), and photochemistry to establish nanotube diameter-dependent charge separation efficiencies are reported. The MP-SWCNT(n,m) [M=2H or Zn, and (n,m)=(7,6) or (6,5)] nanohybrids are characterized by a variety of spectroscopic, thermogravimetric, TE…
The work described in this paper is related to the effect of adding carbon nanotubes (CNT) on the mechanical properties of polymer-cement composites. A full factorial design has been performed on 160 samples to identify the contribution provided by the following factors: polymeric phase addition, CNT weight addition a…
Abstract Conducting composites of polyaniline doped with dodecylbenzenesulfonic acid (PAni.DBSA), carbon black (CB) and poly(styrene‐b‐styrene‐butadiene‐b‐styrene) (STF) as supporting matrix were prepared by in situ polymerization. The influence of components and composition (% w/w) on the electromagnetic properties (…
Abstract The breath‐figures self‐assembly process was studied. Polystyrene and polycarbonate were dissolved in a diversity of solvents including, acetone, dichloromethane, chloroform, carbon tetrachloride, tetrahydrofuran, toluene, xylenes, carbon disulfide, and N‐N dimethylformamide, and then were evaporated in a hum…