Materials Literature
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Abstract Synthesis and electropolymerization of the new bisthienyl‐substituted diketopyrrolopyrrole monomer 1,4‐diketo‐2,5‐di‐hexyl‐3,6‐bis{[2‐(3',4'‐ethylenedi‐oxy)thienyl]phenyl}pyrrolo[3,4‐c]pyrrole (EDOT‐DPP‐EDOT) is reported. EDOT‐DPP‐EDOT exhibits a low oxidation potential of 0.67 V versus ferrocene and can be e…
Superfluid density ($n_s$) in the mixed state of an iron pnictide superconductor Ba$_{0.6}$K$_{0.4}$Fe$_2$As$_2$ is determined by muon spin rotation for a sample with optimal doping ($x=0.4$). The temperature dependence of $n_s$ is perfectly reproduced by the conventional BCS model for s-wave paring, where the order p…
The nanoparticles-induced vertical alignment technique was applied to generate variable liquid-crystal pretilt angles based on doping different concentrations of polyhedral oligomeric silsesquioxane (POSS) nanoparticles in the planar-aligned liquid crystal cells. Competition between the homogeneously aligned polyimide…
Adsorbed phosphate on smooth platelet alpha-Al2O3 particles at saturation surface coverage gives rise to strong interparticle attractive forces in dispersion. The maximum yield stress at the point of zero charge was increased by 2-fold. This was attributed to a high density of intermolecular hydrogen bonding between t…
We report an experimental and theoretical investigation of the wetting behavior of different model polar and nonpolar liquids and their mixtures on superhydrophobic fractal surfaces made of polymer- or silane-coated "core-shell" particles. We compared the experimental results with the theoretical predictions made acco…
The defect formation energies of transition metals (Cr, Fe, and Ni) doped in the pseudo-H passivated ZnO nanowires and bulk are systematically investigated using first-principles methods. The general chemical trends of the nanowires are similar to those of the bulk. We also show that the formation energy increases as…
We describe the synthesis and phase behavior of a nearly monodisperse poly(cyclohexylethylene- b -ethylene- b -cyclohexylethylene- b -ethylene- b -cyclohexylethylene- b -ethylene- alt -propylene) (CECEC-P) hexablock terpolymer, synthesized by sequential anionic polymerization followed by catalytic hydrogenation. This…
Electron paramagnetic resonance spectroscopy has afforded the identification of a much postulated 1,4-dioxy biradical that occurs within the light producing pathway of peroxyoxalate chemiluminescence.
This report aims to reveal the cause of wide variation in the reported degree of improvement in wear resistance of cryotreated tool steels. Sliding wear tests at different normal loads have been carried out on conventional and cryotreated AISI D2 steel specimens together with SEM examinations and EDX microanalyses of…
Electrical resistivity under high pressure have been measured on nominally pure SrFe2As2 up to 14 GPa. The resistivity drop appeared with increasing pressure, and we clearly observed zero resistivity. The maximum of superconducting transition temperature (Tc) is 38 K. The value is corresponding to the one of optimally…
We study Hopf bifurcation with SN-symmetry for the standard absolutely irreducible action of SN obtained from the action of SN by permutation of N coordinates. Stewart (1996 Symmetry methods in collisionless many-body problems, J. Nonlinear Sci. 6 543–63) obtains a classification theorem for the C-axial subgroups of S…
In the last decade, metallic nanoparticles have been largely applied in catalysis, taking advantage of their surface as well as of their ability to give molecular species. From a mechanistic point of view, the comprehension of the interaction of the stabilizer, solvent or substrate with the metallic surface is essenti…
Bipyramidal-shaped single crystalline nanocones of ZnO, doped with Mn 2+ ions up to different concentrations, were synthesized through a solvothermal route and characterized by X-ray diffraction and transmission electron microscopy. The compositional analysis was also carried out by energy-dispersive analysis of X-ray…
A model was developed for the interactions between glycogen and biomacromolecules by gold nanoparticle plasmon resonance light-scattering method. The interactions between glycogen and biomacromolecules can alter the aggregation status of gold nanoparticles, which produced intensity changes in plasmon resonance light-s…
A structural investigation in water solution of the sodium carboxylate-terminated (generation G3.5) Tomalia-type poly(amidoamine) dendrimers has been performed by means of the small angle X-ray scattering (SAXS) technique. A long-range intermolecular interaction, revealed by the presence of sharp peaks in SAXS spectra…
Abstract BACKGROUND: The thermal behaviour of poly(lactic acid) (PLA) in contact with compressed CO 2 was studied using high‐pressure differential scanning calorimetry. In particular, the effect of annealing below and above the glass transition temperature ( T g ) on the glass transition, cold crystallization and melt…
Abstract Carbon nanotubes (CNTs) are used as templates to synthesize regioselective polymers from enzymatic polymerization of phenol in water. About 90% of total polymeric units in the obtained polymers are the highly thermally stable oxyphenylene units. The polymer‐yields are dependent on the quantities of CNTs used.…
Nickel–manganese mixed oxides were prepared with sol–gel and coprecipitation methods. The characterization of the different samples was made by XRD, TPR, FT-IR and Raman spectroscopies. NiMn 2 O 4 spinel was obtained at a calcination temperature of 900 °C; the solids calcined at 750 °C give in addition to the spinel p…
The novel amphipilic conjugate of a calix[4]arene with four Gd-1,4,7,10- tetra(carboxymethyl)-1,4,7,10-tetraazacyclododecane (DOTA) chelates has potential as a magnetic resonance imaging contrast agent, both in its monomeric and in its micellar form. The system, illustrated here with its nuclear magnetic relaxation pr…
Using ambient atmosphere instead of pure nitrogen environment enabled efficient recording of room temperature fluorescence from single molecules of porphycenes, chromophores with a high triplet formation efficiency. Double hydrogen transfer between two chemically identical trans tautomers has been demonstrated for par…