Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Conjugate polymers assemble into novel superstructures when they are prepared by chemical or electrochemical oxidation of ethylenedioxythiophene, pyrrole or aniline in the presence of ‘anionic’ templates. The ‘anionic’ templates used are the [60]fullerene/anionic calix[8]arene complex, anionic porphyrin J-aggregate, a…
A double minimum six-dimensional potential energy surface (PES) is determined in symmetry coordinates for the most stable rhombic (D2h) B4 isomer in its 1Ag electronic ground state by fitting to energies calculated ab initio. The PES exhibits a barrier to the D4h square structure of 255 cm(-1). The vibrational levels…
We propose to use photodesorption as a noninvasive tool to clean carbon nanotubes from oxygen, offering a clear advantage over thermal and chemical treatments. The detachment of chemisorbed oxygen from atomic vacancies is triggered by a resonant Auger process, initiated by an $\mathrm{O}\phantom{\rule{0.3em}{0ex}}1s\e…
Supramolecular approaches to visual detection, storage, conversion and use of NO X gases are described that deploy calixarenes and their derivatives, such as hemicarcerands and synthetic nanotubes. Polymer-supported calixarene materials for NO X are also introduced. Chemical fixation of NO2/N2O4 is demonstrated throug…
The aggregation process of the tetraanionic H2TPPS and the tetracationic CuT4 porphyrins leads, in aqueous solution and in the presence of a suitable chiral template, to the formation of remarkably stable and kinetically inert chiral porphyrin heteroassemblies. These properties enable the aggregates to survive templat…
Gold nanoparticles can be encapsulated by various resorcinarene derivatives and assembled into monolayer films at solvent interfaces. Surface charge plays a critical role in both nanoparticle extraction and self-assembly: the degree of monolayer formation and local two-dimensional (2D) order within the nanoparticle ar…
Abstract Summary: Surface modification induced on poly(ethylene terephthalate) (PET) fibers by cold SF 6 plasma treatment has been investigated systematically as a function of plasma device parameters. The observed wettability modifications of fibers plasma‐treated under different operating conditions were correlated…
Mean-field theory is used to model polyelectrolyte adsorption and the possibility of overcompensation of charged surfaces. For charged surfaces that are also chemically attractive, the overcharging is large in high salt conditions, amounting to 20-40 % of the bare surface charge. However, full charge inversion is not…
Abstract Summary: Poly(arylene ether amine)s were synthesized by a nucleophilic aromatic substitution polycondensation of bis[4‐fluoro‐3‐(trifluoromethyl)phenyl]amine with several bisphenols. Even though the monomer has an electron‐donating diphenylamine moiety, which normally deactivates a nucleophilic aromatic subst…
Grenmarite, a new mineral of the gö tzenite-seidozerite-rosenbuschite group, was found in a syenite pegmatite at the eastern side of the island Vesle Arøya in the Langesundsfjord district, Norway. Grenmarite, ideally (Zr,Mn) 2(Zr,Ti)(Mn,Na) (Na,Ca)4(Si2O 7)2(O,F)4, is the Zr-analogue of seidozerite. It is monoclinic…
This article provides an overview of our recent studies on developing functionalized lipid bilayer membranes, on which enzymatic activity was controlled by a molecular switch through connection of molecular recognition. A water-soluble enzyme, such as lactate dehydrogenase, was immobilized noncovalently on the lipid v…
We study the lattice dynamics of an amorphous∕crystalline∕silicon sandwich model using the environment-dependent interatomic potential (EDIP). We establish a base line by computing the vibrational properties of the component bulk crystal and bulk amorphous structures, which show reasonable agreement with experiment an…
Abstract Summary: We utilise pulsed AC plasma polymerisation to create thin films that either contain reactive acid functional groups (by deposition of maleic anhydride (MAH) followed by hydrolysis) or are poly(ethylene glycol) (PEG)‐like in nature (by using diethylene glycol vinyl ether (DEGVE) as monomer). The MAH f…
Abstract Summary: The complex dynamics of poly( n ‐alkyl methacrylates) is studied by advanced 13 C NMR spectroscopy as well as mechanical and dielectric relaxation. Extended backbone conformations are identified as the molecular units involved in structural relaxation. From the variation in the degree of polymerizati…
Abstract This article focuses on why and how the chemical synthesis of cellulose was accomplished. The synthesis of cellulose was an important, challenging problem for half a century in polymer chemistry. For the synthesis, a new method of enzymatic polymerization was developed. A monomer of β‐ D ‐cellobiosyl fluoride…
A fuel processor that reforms natural gas to hydrogen-rich mixture to feed the anode field of fuel cell stack is considered. The first reactor that generates the majority of the hydrogen in the fuel processor is based on catalytic partial oxidation of the methane in the natural gas. We present a model-based control an…
Abstract Summary: Two well‐characterized metallocene isotactic poly(propylene) (iPP) samples, one of high and one of low molecular weight, were blended together for studying the effects of a second component on quiescent and shear‐induced crystallization. A small amount of added high molecular weight (HMW) (up to 10 w…
Experimental results, by x-ray absorption (XAS) at the oxygen $K$-edge and photon-energy dependence of the $\mathrm{O}$ $1s2p2p$ Auger line at the $\mathrm{O}$ $K$ threshold, below Mn ${L}_{2,3}$ as well as well above the Mn ${L}_{2,\mathrm{3}}$ edge of colossal magnetoresistance (CMR) manganites ${\mathrm{Pr}}_{1\ens…
Inkjet printing of the conductive polymer poly(3,4-ethylene dioxythiophene) doped with polystyrene sulfonated acid has been used as the basis for a sensor for organic vapors. The electrical resistance of the film was monitored as it was exposed to atmospheres containing alcohol. Ultrathin films exhibited a sharp and n…
Abstract Summary: Cylindrical brushes with poly( L ‐lysine) and poly( L ‐glutamate) side chains were prepared by “grafting through” and “grafting from” techniques. Grafting from is shown to be more successful for the synthesis of cylindrical brushes with high molar mass main and side chains. AFM height image of polype…