Materials Literature
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Quasi-elastic light scattering (QELS) and quartz crystal microbalance (QCM) non-equilibrium and equilibrium studies of competitive interactions of pairs of polymers and proteins with fumed silica and ceramic coatings deposited on QCM crystals show complex interfacial behaviour. The effects observed depend on the adsor…
Abstract Reactive poly(ethylene terephthalate) / polycarbonate (PET/PC) melting blends were prepared with different cobalt catalyst and polymer compositions. The presence of catalyst increased the miscibility of the 20/80 (wt%) blend, according to differential scanning calorimetry (DSC) and dynamic‐mechanical analyses…
AgI nanoparticles coated with silica shell (AgI/SiO2) were prepared with an amine-free process, i.e. a modified Stöber method. A colloid solution of 3.9 × 10−4 M AgI nanoparticles was prepared mixing silver perchlorate at 3.9 × 10−4 M and potassium iodide at 7.8 × 10−4 M. A silica-coating was performed at 4.5 × 10−6 M…
Electrocaloric effect (ECE), i.e., the heating or cooling of electrocaloric material due to the applied electric field under adiabatic conditions, is very attractive phenomenon for application in cooling and heating devices of new generation in which heating and cooling elements will be made without moving parts and t…
ThO2 with approximately 3% 233UO2 is the proposed fuel for the Advanced Heavy Water Reactor (AHWR) and characterized as a mixed oxide (MOX) fuel. Due to the existence of a single oxidation state, quantitative dissolution of MOX samples like (Th-U)O2 and (Th-Pu)O2 is a challenging task for any analytical chemist. Howev…
The in situ ultraviolet-visible (UV-Vis) spectroelectrochemical study on the copolymerization of diphenylamine (DPA) and o-phenylenediamine (OPD) has been performed at a constant potential of 0.8 V using indium tin oxide (ITO)-coated glass electrodes as working electrode. And also, as a comparison, the electrochemical…
The length of Ag nanorods is uniquely controlled by irradiation with visible light using anatase TiO2-containing tubular SiO2 mesoporous templates. Spherical Ag nanoparticles and Ag nanorods of controlled length were fabricated by irradiation with visible light of selected wavelengths.
The co-assembly of mutually complementary, but self-repulsive oligopeptide pairs into viscoelastic hydrogels has been studied. Oligopeptides of 6, 10, and 14 amino acid residues were used to investigate the effects of peptide chain length on the structural and mechanical properties of the resulting hydrogels. Biophysi…
We report a bimolecular motor-driven, dynamic self-assembly system in which the thermodynamic (biotin–streptavidin bond formation) and energy dissipative (ATP catalysis) components can systematically be varied to achieve several morphologically distinct nanocomposite structures consisting of microtubules and semicondu…
A low thermal expansion and ferromagnetism enhanced compound (1−x−y)PbTiO3-xBi(Ni1/2Ti1/2)O3-yBiFeO3 was developed by chemical composition controlling. The appropriate ratio of dopants Bi(Ni1/2Ti1/2)O3 and BiFeO3 not only tailored the thermal expansion but also realized high thermal stability in a wide temperature ran…
This paper deals with the influence of cryogenic treatment on the hardness and tensile behaviour of AISI 4140 steel. The impetus for studying the tensile properties of steels is to ensure that steels used in shafts and gears have sufficient tensile strength to prevent failure when they are subjected to tensile or fati…
Two families of polyaromatic hydrocarbon (PAH) oxyradicals are investigated using density functional theory (DFT) and the semi-empirical PM6 method. These families result from the edge oxidation of substrates that involve only zigzag edges and those that include both zigzag and armchair edges. Oxyradical stability is…
Cuprous oxide (Cu2O), with various morphologies including nanosphere, quasi-cubic, type-I Cu2O, type-II Cu2O (as illustrated in the Experimental section), cube, and type-I nanoframe, has been synthesized selectively in high-yield by a simple solution-phase method. Among them type-I and type-II Cu2O with novel shapes a…
We demonstrate for the first time the application of Principal Component Analysis (PCA) to the analysis of time-resolved energy-dispersive X-ray diffraction data. Previously well-characterised model systems are studied. PCA is shown to offer significant advantages over traditional curve-fitting methods in terms of spe…
Floristic and taxonomic diversity, as well as studies of ecological characteristic of Charophyta algae were carried out within the complex biodiversity researches, in the Zasavica Special Nature Reserve. Nine species were recorded: Chara globularis, C. contraria, C. vulgaris, Nitella mucronata, N. capillaris, N. synca…
A model free evaluation of small angle scattering data of interacting particles results in real space curves that are often difficult to interpret. It is then easier to use a model for the inter and/or the intra particle effects. Such a procedure requires the selection of appropriate models. The selection of the corre…
Green mould, blue mould and sour rot are the most important postharvest diseases affecting grapefruits in Egypt. Different concentrations of organic acids, i.e. benzoic, sorbic and their salts, i.e. sodium benzoate, potassium sorbate as well as chitosan and the fungicide SOPP were evaluated for their effect on the gro…
Lead zirconate titanate (PZT) ceramics is usually used as a piezoelectric material. However it has characteristics of not only piezoelectricity but also flexoelectricity. Piezoelectricity is a phenomenon that electric polarization is induced by strain, and flexoelectricity is the one that the polarization is induced b…
Two kinds of diamond-like carbon films containing Ti, C and Ti, Cr, C were prepared by magnetron sputtering PVD. The microstructure and elemental composition of the films were characterized by atomic-force microscope (AFM) and auger electron spectrometer (AES), the hardness and modulus were analyzed by nano-indentatio…
The amount of oxygen vacancies on the surface of SnO 2 nanowires was controlled by N 2 plasma. Nitrogen ions in N 2 plasma were substituted for oxygen vacancies (V o ) on the nanowire surface, reducing the amount of oxygen vacancies. Photoluminescence spectra showed that the V o -related peak around 600 nm decreased d…