Materials Literature
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Inorganic/organic polyelectrolyte microcapsules (see diagram for synthetic approach) possess the advantages of inorganic materials (i.e., high mechanical stability) and of conventional polyelectrolyte microcapsules (i.e., the ability to control the release/uptake properties of the capsule shell by changing pH value an…
Docking the tails: The triggering of a single cleavage at the core of a new class of dendrimers (see, for example, the second generation dendron) results in a spontaneous chain fragmentation and the release all of the tail (reporter) units. Such dendrimers may be applied as a general platform for prodrugs or sensor mo…
We connected dislocation-based atomic-scale and continuum models of plasticity in crystalline solids through numerical simulations of dislocation intersections in face-centered cubic crystals. The results contradict the traditional assumption that strain hardening is governed by the formation of sessile junctions betw…
Abstract X‐ray photoelectron spectroscopy (XPS) has been used to characterize poly(3,4‐ethylene dioxythiophene)–poly(styrene sulfonate) (PEDT/PSS), one of the most common electrically conducting organic polymers. A correlation has been established between the composition, morphology, and polymerization mechanism, on t…
Development of β-NMR and β-NQR, Zhou Dong-Mei, Zheng Yong-Nan, Zhu Jia-Zheng, Xu Yong-Jun, Du En-Peng, Wang Zhi-Qiang, Luo Hai-Long, Yuan Da-Qing, Rong Chao-Fan, M. Mihara, M. Fukuda, K. Matsuta, T. Minamisono, Zhu Sheng-Yun
Computational formulae for the coefficients of the third-order spherical aberration and the second-order axial chromatic aberration are presented for an axially symmetric electrostatic electron mirror. A technique for eliminating the high-order derivatives of the potential axial distribution in mirror systems from the…
Abstract The problem of overly high contents of remnant monomers (free phenol and free formaldehyde) in phenolic foam was studied. Free phenol was characterized by iodimetry, and free formaldehyde was characterized by a hydroxylamine hydrochloride method. The effect of the phenol/formaldehyde molar ratios and the reac…
Abstract Double bonds reactive with active radical species were introduced onto the surface of carbon yarn by the plasma‐graft polymerization of adipic acid divinyl ester and ethylene glycol dimethacrylate monomers to increase the adhesive strength in the interface between the carbon yarn and a vinyl ester resin. The…
We calculate the excitonic transition energies and exciton binding energies in ZnO/Mg x Zn 1- x O quantum-well heterostructures with Mg composition x varied from 0.08 to 0.36. The effect of the exciton-phonon interaction on the exciton binding energies is taken into account in the model. For the ZnO/Mg 0.12 Zn 0.88 O…
Magnetic, transport, and electron magnetic resonance properties of ${\mathrm{Pr}}_{0.8}{\mathrm{Ca}}_{0.2}{\mathrm{MnO}}_{3}$ single crystals have been investigated. Two ferromagnetic transitions observed at ${T}_{C1}\ensuremath{\approx}130\mathrm{K}$ and ${T}_{C2}\ensuremath{\approx}60\mathrm{K},$ denote a long range…
Abstract Series of gel electrolytes based on thermoplastic polyurethane (PU) with different organic additives were prepared and studied. Structural characterization was carried out by differential scanning calorimetry (DSC), dynamic mechanical analyzer (DMA), scanning electron microscopy (SEM), and atomic force micros…
The present work deals with the comparative application of the CPSM (corrugated pore structure model), the α s plot and the pore connectivity methods for pore structure analysis and especially the detection of microporosity of a category of montmorillonite clays pillared with LaNiO x binary oxide. A quite good agreeme…
Abstract The compatibilizing effect of mercapto‐modified ethylene–vinyl acetate (EVALSH) was investigated in vulcanized nitrile rubber (NBR)/ethylene–vinyl acetate (EVA) copolymer blends. EVALSH increased the ultimate tensile strength, mainly in blends containing larger amounts of NBR. In addition, an accelerating eff…
Periodic spindle-unit boron nitride (BN) nanotubes with buglelike open-end tips have been found in the product by nitriding Fe-B nanoparticles at 1100 °C with a mixture of nitrogen and ammonia gas. The microstructure was well-characterized by high-resolution transmission electron microscopy (HRTEM) and energy-dispersi…
Field emission of electrons from narrow-band-gap and wide-band-gap one-dimensional nanostructures were studied. N-type silicon substrates enhanced the emission from the low-band-gap silicon nanowires and carbon nanotubes, whereas p-type substrates were a better choice for field emission from wide-band-gap silicon carb…
A new type of highly conductive self-doping polyaniline, MPS−Pan, containing a sulfonic acid moiety covalently bonded to the polymer backbone through an electron-donating propylthio linkage has been successfully prepared via a novel concurrent reduction and substitution route. At a similar self-doping level, the resul…
Abstract Phenolic resin–layered silicate nanocomposites (PLSNs) were synthesized by melt intercalation with linear novolac resin (P1) and organosilicates such as montmorillonite modified by benzyldimethyloctadecylammonium (C18BM) and by bis(2‐hydroxy‐ethyl)methyl tallow ammonium (THEM). The PLSNs were prepared by a se…
Cyclodextrin inclusion for self-aggregative sensitizers was found to improve quantum yields for photoinduced energy/electron transfer by the isolation of sensitizers in an aqueous solution. In water, cyclodextrin derivatives can prevent self-aggregation of sensitizers, which decreases the total quantum yields for phot…
The local dynamics of the low-T(g) component in a polymer blend, dynamically asymmetric poly(styrene)-poly(vinyl methyl ether) (PS-PVME), is studied below the glass transition, via dielectric relaxation spectroscopy. A particular attention has been paid to blends with a high PS content (PS weight fraction higher than…
Novel meso-substituted cationic porphyrins have been synthesized as potential photodynamic agents. 5,10-bis(4-Acetamidophenyl)-15,20-bis(4-methylphenyl)porphyrin 1 was prepared using a modification of the Alder-Longo procedure. However, two different approaches were compared in the synthesis of 5-(4-trifluorophenyl)-1…