Materials Literature
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Topological design of mesoporous silica materials, pore architecture, pore size, and morphology are currently major issues in areas such as catalytic conversion of bulky molecules, adsorption, host-guest chemistry, etc. In this sense, we discuss the pore size-controlled mesostructure, framework functionalization, and…
The crystal structures of the hydrated salts of [Gd.DOTAM]3+ and its more hydrophobic derivative [Gd.]3+, bearing 4 alpha-phenylethyl groups, (both Gd and Yb salts) are reported and compared. The nature of the anion determines the degree of ordering in the lattice and the extent of hydration. These effects are correla…
Abstract Average helical twists were calculated by the method of Sugeta and Miyazawa (Biopolymers 1967, 5, 673–679) for all of the collagen model peptides analyzed to date. Calculation of the helical twists of all triplets in each peptide strand provided novel insights for several model peptides. In the (Pro‐Pro‐Gly)…
The synthesis, electrochemical and photophysical properties of the following tetra-substituted thiol oxotitanium phthalocyanines are reported for the first time: 1,(4)-(tetraphenylthiophthalocyaninato)titanium(IV)oxide (); 1,(4)-(tetrabenzylthiophthalocyaninato)titanium(IV)oxide (); 2,(3)-(tetraphenylthiophthalocyanin…
A series of liquid crystalline homopolymers that have photoisomerizable cyanoazobenzene groups in the side chain has been synthesized and characterized. Thin films of these polymers have been processed in order to study the absorption spectra and circular dichroism responses after illumination with 488 nm circularly p…
Zinc oxide films were grown in a temperature range of 75 – 150 ° C by plasma-enhanced ALD for the application of flexible transparent thin-film transistor (TFT). We have investigated the effect of precursor pulsing time, temperature, and radio frequency power on the film growth. The X-ray diffraction patterns of polyc…
Composites of yttria-stabilized zirconia (YSZ) and mixed perovskites with the average compositions La 0.8 Sr 0.2 Mn ( 1 − x ) Co x O 3 ( x = 0 , 0.1, 0.25, and 0.5) and with total loadings of 40 wt % perovskite were prepared by impregnation of aqueous salt solutions into a porous YSZ cathode matrix and examined for th…
Nanorods composed of a variety of conjugated organic molecules were synthesized using an anodized alumina template and solvent annealing; detailed study of 200 nm thick 2,7-di-t-butylpyrene rods showed they are crystalline, with single domains extending over several microns.
Characterization of thermal properties of thermal interface materials (TIMs) has gained increasing importance as the relative percentage of overall semiconductor package material thermal resistance attributable to the TIMs has increased. The development of new TIM materials has increasingly focused on materials with v…
A novel and facile route to control the porosity of materials for Solid Oxide Fuel Cells (SOFCs) applications has been developed through the simple combination of oxide powders, polyvinyl alcohol and poly(methyl methacrylate) (PMMA) microspheres. This method allows the microstructure to be optimised improving the perf…
X-ray and neutron scattering studies of the lead-based family of perovskite relaxors Pb(Zn1/3Nb2/3)O3–xPbTiO3 (PZN-xPT) and Pb(Mg1/3Nb2/3)O3–xPbTiO3 (PMN-xPT) have documented a highly unusual situation in which the near-surface region of a single crystal can exhibit a structure that is different from that of the bulk…
Hydrous ruthenium oxide, , was prepared according to a sol-gel process and annealed at different temperatures. The importance of high electronic conductivity for high capacity in aqueous was revealed through two approaches. The electronic resistivity of measured in situ as a function of the electrode potential shows a…
In this investigation, the effect of coloring voltage and thickness on optical and also electrochromical properties of WO 3 thin films has been studied.The WO 3 thin films were grown on glass and indium tin oxide coated conducting glass substrates by e-beam evaporation at different thicknesses of 200, 400, and 700 nm.…
We present a facile and effective method for controlling the surface hydrophobicity of polyimide films from sticky to superhydrophobic properties by tailoring their topographies. Nanostructured silver layers were produced on polyimide films by treatment with aqueous KOH and AgNO3, followed by thermal treatment at 200…
Mesoporous silica films with uniaxially oriented mesochannels were prepared by dip coating under a steady-homogeneous magnetic field parallel to a substrate. The effect of a strong magnetic field (12 Tesla) on the preparation of mesoporous silica films was systematically investigated by using two kinds of templates. W…
The implantation of biomaterials, medical devices or prostheses can instigate a rejection response or initiate an undesirable adsorption of plasma proteins, as well as blood cells on the implant surface, thus triggering diverse defense mechanisms against the supposed pathologic invader. The extent of this inflammatory…
Functionalized gold nanoparticles bind selectively to cytochrome c or cytochrome c peroxidase and inhibit enzyme turnover.
The effect of triethyl citrate (TEC) and different molecular weights and concentrations of polyethylene glycol (PEG), in addition to the effect of different water-soluble polymers and dispersions at different levels, hydroxypropyl methylcellulose (HPMC), methylcellulose (MC), carbomer 940, polyvinyl alcohol (PVA), eth…
The local breakdown of the iron passive layer and the resulting pitting corrosion were studied with a coupled scanning electrochemical microscopy/electrochemical quartz microbalance technique (SECM/EQCM). The initiation and the propagation of a single pit on iron deposited on the quartz gold electrode were controlled…
In pitting corrosion, the pit stability product is the product of anodic current density and depth, i a , which for an open hemispherical cavity would be proportional to the product of the cation diffusivity and some interfacial concentration of the dissolving cations, DC . Many authors believe that pit growth is diff…