Materials Literature
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We fabricated thermo responsive colloidal molecules of ca. 250 nm size. Electron and scanning force microscopy reveal the dumbbell shaped morphology. The temperature dependence of the size and aspect ratio ca. 1.4 to 1.6 is analyzed by depolarized dynamic light scattering and found to be in good agreement with microsc…
We report the growth of an unstable shell-like gold structure around dihexagonal pyramidal CdSe nanocrystals in organic solution and the structural transformation to spherical domains by two means: i) electron beam irradiation (in situ) and (ii) addition of a strong reducing agent during synthesis. By varying the cond…
Samples of strontium ferrite (Sr-M) with different molar substitution concentrations of lanthanum, neodymium and samarium ions were prepared by a standard ceramic processing technique. AC conductivity, dielectric constant and dielectric loss tangent measurements were carried out in the frequency range of 20 Hz to 1MHz…
New mesogenic homologous series having azo-ester central linkages was synthesized. All the homologues of the homologous series exhibit mesomorphism. Mesomorphism commences from the very first members of the series. Smectic mesophase commences from tenth homologue in addition to nematic mesophase. Sixteenth homologue i…
This paper seeks the effects of operating variables on mechanical properties of starch/natural rubber/clay nanocomposites including tensile strength and modulus. The variables were natural rubber type, clay, glycerol and natural rubber contents. The experiments were carried out based on the design of experiments using…
Funcţionalizarea nanotuburilor de carbon cu pereţi multipli (MWNT) poate imbunataţii proprietaţile termice si mecanice ale compozitelor epoxidice in care sunt incorporate drept agenţi de ranforsare. Gruparile aminice au fost alese in vederea funcţionalizarii MWNT carboxilate datorita posibilitaţii de deschidere a inel…
Cellulose is the most abundant renewable bioresource in the world and the most promising feedstock for industry in the future. Ionic liquids as novel and designable solvents have attracted much attention. In this review, the progress of the dissolution of cellulose in ionic liquids is illustrated. As suitable and envi…
Effects of calcium carbonate of different compositions (0 - 40 wt%) and particle size distributions (0.06, 0.5, 3.5, 10, 20, and 841µm) on the mechanical properties of flexible polyurethane foam were investigated in this study. The experiments were conducted in a foaming plant (ISOBLOCK IB 150/4F-SS) and the mechanica…
The fabrication of hollow silica particles is of interest from both academic and application viewpoints. In this paper, we propose a distinctly novel method by which hollow silica particles are successfully fabricated in a self-stable system without any surfactants during a self-consumptive templated process. In detai…
The self-assembly of the amphiphilic block copolymer poly(butadiene)-block-poly[2-(dimethylamino)ethyl methacrylate] at the air-water interface and the mineralization of the monolayers with calcium phosphate was investigated at different pH values. As expected for polyelectrolytes, the subphase pH strongly affects the…
The electrical resistance of carbon nanotube networks (NNs) prepared from combinations of gellan gum, xanthan gum, Triton X-100, SWNT and MWNT is reported. It is demonstrated that the NN conductivity can be obtained by analysing the resistance of two overlapping NN as a function of their overlap distance. Unexpectedly…
We investigate the quality of structural models generated by the Reverse Monte Carlo (RMC) method in a typical application to glass systems. To this end we calculate diffraction data from a Li(2)O-SiO(2) molecular dynamics (MD) simulation and use it, in addition to minimal pair distances and coordination numbers of si…
We report the synthesis of macrocyclic DTPA conjugates of 1,1'-bis(amino)ferrocenes (1a-b) and their Gd-complexes [Gd(L)(H(2)O)] (2a-b, L = 1a-b) for use as new MRI blood-pool contrast agents. High R(1) relaxivity in HSA as well as high thermodynamic and kinetic stabilities is observed for 2a.
We report, for the first time, the synthesis of superparamagnetic and fluorescent nickel (Ni) nanoparticles (consisting of a single material) directly conjugated to an enzyme, bovine pancreatic α-chymotrypsin (CHT), by chemical reduction in aqueous solution. The structural characterization of Ni–CHT nanobioconjugates…
Dimensionally stable, high surface area support for a possible direct methanol fuel cell application was fabricated from commercial diamond nanoparticles through electrophoretic deposition onto silicon wafer substrates, and their electrochemical characteristics were examined by employing inorganic redox probes such as…
Epitaxial tetragonal PZT films with (100)/(001) and (110)/(101) and (111) orientations were grown on various kinds of single crystal substrates having different thermal expansion coefficient. Volume fractions of (001) and (101) orientations in respective (100)/(001)- and (110)/(101)-oriented films were almost linearly…
Block copolymers composed of unsubstituted polystyrene and electron-rich alkyne functionalized polystyrene segments were prepared by atom transfer radical polymerization (ATRP) of N,N-didodecyl-4-[(4-vinylphenyl)ethynyl]aniline (2) with bromine-terminated polystyrene (1). Subsequently, the atom-economic addition react…
The values of the combustion and enthalpies of formation for ε-caprolactone were determined by means of combustion calorimetry. The vapor pressures of lactone were measured in the range of 283–353 K, and the value of its enthalpy of vaporization was estimated by the transpiration method. Conformational analysis and ca…
Three sandwich-type silicotungstates, formulated as [Cu4(H2O)2(SiW9O34)2] x 12 NH4 x 22 H2O (1), [Cu4(H2O)2(SiW9O34)2] x 12 NH4 x 11 H2O (2) and {[Cu(NH3)4]2[Cu(H2O)4][Cu4(H2O)2(SiW9O34)2]} 2[Cu(NH3)4(H2O)] x 2 NH4 x 6 H2O (3), were synthesized by microwave irradiation and hydrothermal reaction. Crystal structural ana…
We fabricated thermoresponsive colloidal molecules of ca. 250 nm size. Electron- and scanning force microscopy reveal the dumbbell-shaped morphology. The temperature dependence of the size and aspect ratio (ca. 1.4 to 1.6) is analyzed by depolarized dynamic light scattering and found to be in good agreement with micro…