Materials Literature
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We present the structural and dynamic nature of water ultraconfined in the quasi-two-dimensional nanopores of the highly disordered calcium-silicate-hydrate (C-S-H), the major binding phase in cement. Our approach is based on classical molecular simulations. We demonstrate that the C-S-H nanopore space is hydrophilic,…
We report the first synthesis of polyimide aerogels cross-linked through a polyhedral oligomeric silsesquioxane, octa(aminophenyl)silsesquioxane (OAPS). Gels formed from polyamic acid solutions of 3,3',4,4'-biphenyltetracarboxylic dianhydride (BPDA), bisaniline-p-xylidene (BAX) and OAPS were chemically imidized and dr…
INTRODUCTION: Intravenously injected nanoparticles, like any other foreign pathogen that enters the body, encounter multiple lines of defense intended to neutralize and eliminate the invading substance. Adsorption of plasma proteins on the nanoparticle surface is the first barrier of defense, which could lead to physi…
Carbon fibre composites (CFCs) planned to be used in the International Thermonuclear Experimental Reactor (ITER) divertor can be eroded due to hydrogen species from the plasma and the resulting hydrocarbons can be redeposited in other locations. Tritium retention in redeposited materials is the major concern due to th…
Abstract PMMA (polymethylmethacrylate), which is miscible with hexafluoropropane dianhydride (6FDA)‐based polyimide, was grafted onto MWNTs surfaces to enhance their dispersion relative to that of pristine MWNTs. The electrical conductivity of the 6FDA‐based composite revealed percolation threshold behavior, and the 6…
Abstract In this study, Poly(acrylonitrile‐ co ‐vinyl acetate) [P(AN‐ co ‐VAc)] composite films were fabricated by chemical polymerization of pyrrole (Py) with cerium(IV) (Ce(IV)) on P(AN‐ co ‐VAc) matrix. The effect of amount of Py and temperature on the composite film properties was studied in a frequency range star…
A modified phase function model has been introduced to evaluate the imaging performance of hybrid systems considering the dispersion. In this paper, the effects of incidence angles and manufacturing errors on the performance of hybrid systems are analyzed by an additional phase difference (APD) method based upon the m…
Abstract Cobalt based catalysts synthesized by the silica aquagel confined co‐precipitation (SACOP) method and analyzed at high spatial velocities (≈39 000 h −1 ) for the preferential oxidation (PROX) of CO in the presence of hydrogen showed the highest values of catalytic activity of all the cobalt‐based catalysts de…
Molekularer Sauerstoff induziert eine reversible Bandverbiegung, wie Untersuchungen des Ladungszustands von Au-Nanopartikeln auf einem TiO2-Träger unter O2-Druck mit Röntgenphotoelektronenspektroskopie ergaben (siehe Bild). Die Ergebnisse geben Aufschluss über Ladungstransferphänomene bei Katalysatoren und erklären in…
Abstract The theoretical study of microwave characteristics of a thin film of hydrogen plasma in carbon nanotubes, which were grown by iron-catalyzed high-pressure carbon monoxide disproportionation, is presented. The system is assumed to be illuminated by either a transverse magnetic (TM) or a transverse electric (TE…
The corresponding author, Xue-Chao Liu, would like to apologize for the omission of some of the contributing authors from this published paper. The full list of contributing authors should read: Xue-Chao Liu, R J H Morris, M Myronov, A Dobbie and D R Leadley Dr R J H Morris contributed the secondary ion mass spectrome…
Abstract The present study focuses on fabricating of polymer–clay nanocomposites by in situ polymerization method and investigating their permeability behavior toward vapor and liquid molecules, thus, to evaluating barrier properties of the nanocomposites. For this purpose, acrylonitrile (AN) monomer was grafted on to…
Abstract Several polyethylene resins namely, high‐density polyethylene (HDPE) (Phillips metal oxide catalyst) and linear low‐density polyethylenes (LLDPE) (formed by using Ziegler‐Natta and metallocene catalyst technologies), were used in order to acquire insight into the effect of different polymerization catalyst sy…
Abstract This article reports on the synthesis of a new pH‐sensitive amphiphilic A 2 B mikto‐arm star‐shaped aliphatic copolyester [with A = poly(ε‐caprolactone) and B = tertiary amine‐bearing poly(ε‐caprolactone)] with two hydrophobic arms and one hydrophilic arm when protonated at pH = 5.5. First, the ring‐opening p…
Abstract The mechanical behavior of microfibrilar composites (MFC), consisting of a matrix of high‐density polyethylene (HDPE) and reinforcement of polyamide 6 (PA6) fibrils, with and without compatibilization, was studied. The composites were produced by conventional processing techniques with various shape and arran…
Abstract We propose here, a novel technique to synthesize high molecular weight (MW) poly ( L ‐lactic acid)‐clay nanocomposite (PLACN), via solid state polymerization (SSP). We synthesize prepolymer of PLACN (pre‐PLACN) from both, L ‐lactic acid and L ‐lactide, as starting materials. Synthesis of pre‐PLACN from L ‐lac…
How to repair a seashell: A partially etched biomineral, namely, the prismatic layer of a seashell, has been repaired in a synthetic system. The oriented nanocrystals and the macroscopic morphologies, with the same specific crystallographic orientation as the original part, can be regenerated through an in vitro repai…
It is well-known that polystyrene- block -poly( n -butyl methacrylate) (PS- b -P n BMA) block copolymers (BCPs) exhibit an hourglass-shaped phase diagram, resulting from the simultaneous appearance of an upper order-to-disorder transition (UODT) and a lower disorder-to-order transition (LDOT). Here, the phase behavior…
Nicht Strom aus Gas, sondern Strom und Gas: Die Erzeugung von Elektrizität und Synthesegas aus Methan gelingt in einer Einkammer-Festkörperbrennstoffzelle (siehe Bild; SDC=Samarium-dotiertes Cerdioxid, YSZ=Yttrium-stabilisiertes Zirconiumoxid) unter vollständigem Methanumsatz und ohne Ausstoß von Treibhausgasen.
Adsorption of NO(2) and retention of NO (the product of NO(2) reduction by carbon) on iron-containing materials prepared from polystyrenesulfonic acid-co-maleic acid iron salt were studied. The surface of the materials was characterized using nitrogen adsorption, XRD, scanning electron microscopy (SEM), transmission e…