Materials Literature
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Poly(ester urethane) (PU) with functional groups (amide, hydroxyl, carboxyl) on surfaces were prepared by grafting monomers such as acrylamide (AAm), hydroxyethyl acrylate (HEA), and methacrylic acid (MAA) onto the PU membranes. Grafting copolymerization was carried out by the combined use of photooxidization and UV i…
Cytocompatible polyurethane (PU) surface was prepared by photo-grafting 2-hydroxyethyl acrylate (HEA) onto the membrane surface. Graft polymerization was conducted by combining the use of the photo-oxidation and irradiation grafting. PU membrane was photo-oxidized to introduce the hydroperoxide groups onto the surface…
The adsorption of methane on Zn-exchanged zeolites was studied theoretically by density functional theory (DFT). Diverse types of active sites were employed, such as: a Zn(II) cation, which was placed on different rings (4T and 5T), a ZnO (in a tetramer configuration) cluster and a [Zn–O–Zn]2+ dimer complex. The Zn(II…
A series of copper containing mesoporous silicas has been prepared at room temperature using tetramethylorthosilicate as the source of silicon, a quaternary ammonium chloride salt as organic template surfactant and copper complexes obtained from organofunctional silicon molecules as ligands. Using this synthetic route…
Tetra- and octa(13, 17-dioxa nonacosane-15-sulfanyl) substituted metal free- and Ni(II) phthalocyanines have been synthesized from the corresponding phthalonitrile derivatives in the presence the anhydrous metal salt(NiCl2) or a strong organic base. The new compounds have been characterised by elemental analyses, IR,…
Nitrogen plasma treatments that modify polymer surfaces are often accompanied by uncontrollable oxidation phenomena. Air exposure of the treated samples after the plasma process may be the origin of the oxidation, but other oxygen contamination sources during the plasma treatment procedure cannot be eliminated. To cla…
The process of photoanodic etching of deep pores in lightly doped wafers was investigated. On a 6 in. wafer, more than 1 billion pores, regularly distributed over the wafer in a hexagonal array with a pitch of 3.5 μm, were obtained using an electrolytic back contact. The diameter of the pores was about 2 μm and depths…
We developed the ab initio linear combination of Gaussian type orbital program with a generalized Hartree–Fock–Slater (GHFS) functional and calculated the four hydrogen clusters as models of the noncollinear magnetic clusters. We found that the GHFS solutions with the three-dimensional noncollinear spin structure is t…
The photophysical characterisation of bis-porphyrins consisting of two porphyrins bridged by either a quinoxaline Tröger's base (1 and 2) or a biquinoxalinyl (3) spacer are reported. Efficient intramolecular electronic energy transfer (EET) between the rigidly linked free-base porphyrins in 1 and from the zinc(II) por…
Self-assembly of CdTe-nanoparticles and alkylammonium surfactants gives stable, hydrophobic surfactant-encapsulated CdTe-clusters that can be isolated as solid materials which dissolve in common organic solvents, spread at the air–water interface, and show enhanced photochemical stability.
Radiation crosslinking of polymer blends containing the ethylene–propylene terpolymer (EPDM) and polypropylene (PP) was studied. Four binary systems with mixing ratios of 80/20, 60/40, 40/60, and 20/80 w/w and the individual components were γ-processed. The development of the gel content formed in irradiated blends pr…
Poly(o-phenylenediamine) films were electrochemically prepared on gold electrodes from the corresponding monomer in an aqueous solution at a constant potential. The polymeric films prepared in this one-step procedure were found to be thin and insoluble in the aqueous solution. Cyclic and differential pulse voltammetri…
The doubly doped (Bi3+ and Eu3+) GdVO4 powder is synthesized by the combustion of aqueous solutions containing metal nitrate (GdNO3), ammonium nitrate (NH4NO3), ammonium metavanadate (NH4VO3) and 3-methyl-5-pyrazole-5-one (3MP5O). The powders are mixed thoroughly by mechanical crushing for 1 h. The aqueous solution co…
The optical threshold energies for photoionization of several different electron traps in Al2O3 have been determined using photoconductivity and optically stimulated luminescence (OSL). Stimulation of the photoconductivity and OSL is observed over a wide range of optical energies. The localized trapping states giving…
The static fracture toughness of poly(ethylene terephthalate) (PET) melt blended with a modifier containing glycidyl methacrylate (GMA)-grafted ethylene-propylene rubber and homopolymerized GMA was studied on injection molded specimens by adopting the essential work of fracture (EWF) method. It was found that the esse…
Poly(ethylene terephthalate) (PET) and poly(ethylene isophthalate) (PEI) homopolymers were synthesized by the two-step melt polycondensation process of ethylene glycol (EG) with dimethyl terephthalate (DMT) and/or dimethyl isophthalate (DMI), respectively. Nine copolymers of the above three monomers were also synthesi…
Composition dependence of martensitic transformation and ferromagnetic transformation behavior has been investigated for Ni–Mn–Ga ferromagnetic shape memory alloys in a polycrystalline state. DSC measurements were performed to determine the transformation temperatures. Magnetic properties were studied by VSM. It was r…
We have investigated the charge/orbital ordering of the 50% hole-doped bilayer manganite ${\mathrm{LaSr}}_{2}{\mathrm{Mn}}_{2}{\mathrm{O}}_{7}$ by means of high-energy x-ray diffraction and also neutron diffraction on a single crystal. The temperature variation of the superlattice reflections corresponding to the prop…
Since chemical mechanical polishing for damascene processes producing copper interconnections is a wet‐chemical treatment, corrosion control is indispensable. In addition to ordinary corrosion due to chemical and galvanic reactions with slurries, a new type of corrosion, pattern‐specific corrosion, was found. It was c…
We report magnetic studies of $\mathrm{Fe}(\mathrm{TCNE}{)}_{2}\ensuremath{\cdot}x({\mathrm{CH}}_{2}{\mathrm{Cl}}_{2}),$ a member of the family of high-${T}_{c}$ molecule-based magnets, $M(\mathrm{TCNE}{)}_{x}\ensuremath{\cdot}y(\mathrm{solvent})$ $(M=\mathrm{V},$ Mn, TCNE=tetracyanoethelyne). Based on extensive stati…