Materials Literature
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Cationic conjugated polyelectrolytes (CPEs) containing an iridium complex ((ppy) 2 Ir(FlPy)) as the energy acceptor were synthesized via Suzuki coupling reaction. The polymer with 12 mol % (ppy) 2 Ir(FlPy) ( P4 ) shows efficient intrinsic fluorescence resonance energy transfer (FRET) in aqueous solution due to the sol…
We investigate the neutron scattering spectrum in iron pnictides based on the random-phase approximation in the five-orbital model with a realistic superconducting (SC) gap, $\ensuremath{\Delta}=5\phantom{\rule{4.pt}{0ex}}$meV. In the normal state, the neutron spectrum is suppressed by large inelastic quasiparticle (Q…
Because of their potential application as new electrical materials that depend on their redox properties, π-conjugated polymers and oligomers have attracted much attention. Polyanilines, which are chemically stable, are one of the promising classes of conducting π-conjugated polymers. Polyanilines exist in three diffe…
The influence of plasmon excitations in spherical gold nanoparticles on the optical properties of a light-harvesting complex 2 (LH2) from the purple bacteria Rhodopseudomonas palustris has been studied. Systematic analysis is facilitated by controlling the thickness of a silica layer between Au nanoparticles and LH2 c…
We show that the dynamics of soft-sphere systems with purely repulsive interactions can be described by introducing an effective hard-sphere diameter determined using the Andersen-Weeks-Chandler approximation. We find that this approximation, known to describe static properties of liquids, also gives a good descriptio…
SnO 2 and Mn-doped SnO 2 thin films have been grown by radio frequency sputtering in two different atmospheres (Ar and Ar/O 2 ) on Si(100) and Al 2 O 3 (R-cut) at room temperature (RT) and at 500 °C. The RT films are amorphous; those grown at 500 °C are polycrystalline or epitaxial, depending on the substrate. All the…
Spider dragline silk is a self-assembling tunable protein composite fiber that rivals many engineering fibers in tensile strength, extensibility, and toughness, making it one of the most versatile biocompatible materials and most inviting for synthetic mimicry. While experimental studies have shown that the peptide se…
Usually, rotational magnetization (RM) is associated with rotating machine cores. However, in more restricted ways, it also arises in three-phase transformer cores. Modern designs of T-joint yield detours of flux, as a source of RM in the T-joint, the middle limb ends, as well as in the yokes. Simulation of RM is poss…
The potential toxic effects of copper oxide (CuO) nanoparticles (NPs) were studied on differentiated Caco-2 cell monolayers, a classical in vitro model of human small intestine epithelium. Two types of CuO NPs, with different specific surface area, different sizes as raw material but the same hydrodynamic diameter in…
K. Van Hoecke*a, K. A. C. De Schamphelaerea, Z. Alib, F. Zhangb, A. Elsaesserc, P. Rivera-Gilb, W. J. Parakb, G. Smagghed, C. V. Howardc & C. R. Janssenaa Laboratory of Environmental Toxicology and Aquatic Ecology, Faculty of Bioscience Engineering, Ghent University, Gent, Belgiumb Fachbereich Physik and Wissenschaftl…
A cycle-testing of field emission behavior was carried out for graphene film prepared by electrophoresis deposition followed by annealing at 700 °C in argon atmosphere. The result shows that the graphene film displays a stable field emission characteristic after a period of conditioning. Also, it is interesting that t…
Abstract This study concerns the improvement in the antimicrobial activity of new aminated chitosan derivatives. p ‐Benzoquinone (PBQ) conjugated chitin was first prepared and then reacted with ethylenediamine (EDA) to get aminated chitin. The latter was finally deacetylated to get new aminated chitosan derivatives. F…
This paper presents a model which quantitatively predicts grain refinement and strength/hardness of Al alloys after very high levels of cold deformation through processes including cold rolling, equal channel angular pressing (ECAP), multiple forging (MF), accumulative roll bonding (ARB) and embossing. The model deals…
The oxygen-deficient perovskite Sr 0.7 Y 0.3 CoO 2.65−δ contains Co2O 6/2 (001) planes alternating with oxygen-deficient Co1O 1.15-δ planes having 0.15−δ O4 oxygen in the plane capping tetrahedral site Co1. With ordering of the O4 atoms below 300 °C, the oxide exhibits n-type polaronic conduction associated with local…
The optical properties of core-shell CdSe-ZnS quantum dots (QDs) are characterized by complex photophysics leading to difficulties in interpreting quantitative measurements based on QD emission. By comparing the pH dependence of fluorescence of single QDs to that of an ensemble, we have been able to propose a molecula…
Abstract Understanding and controlling 3D nanocrystal self‐assembly is a fundamental challenge in materials science. Assembly enables the unique optical and electronic properties of nanocrystals to be exploited in macroscopic materials, and also opens up the possibility to couple the optical response of nanocrystals t…
The synthesis of centimeter-scale uniform graphene on Pt foils was accomplished via a traditional ambient pressure chemical vapor deposition (CVD) method. Using scanning electron microscopy (SEM) and Raman spectroscopy, we reveal the macroscopic continuity, the thickness, as well as the defect state of as-grown graphe…
Abstract Arrays of nanowires are fabricated with alternating segments of the magnetostrictive alloy Fe 1– x Ga x and Cu using electrochemical deposition in nanoporous anodic aluminium oxide (AAO) templates. The difficult nature of Ga‐alloy electrochemistry is overcome by controlling mass‐transfer and hydrodynamic cond…
Spin-labeled polylactide brush polymers were synthesized via ring-opening metathesis polymerization (ROMP), and nitroxide radicals were incorporated at three different locations of brush polymers: the end and the middle of the backbone, and the end of the side chains (periphery). Electron paramagnetic resonance (EPR)…
A two-hybrid approach was applied to screen for proteins with the ability to interact with PHB synthase (PhaC1) of Ralstonia eutropha. The H16_A0141 gene (phaM) was identified in the majority of positive clones. PhaM (26.6 kDa) strongly interacted with PhaC1 and with phasin PhaP5 but not with PhaP1 or other PHB granul…