Materials Literature
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This paper describes a fabrication strategy based on polymer brushes (20-150 nm thick) and soft lithographic techniques, for creating hydrophobic, cross-linked, laterally patterned polymer films. The hydrophobicity of the resulting micrometer-scale "quasi-2D" objects is shown to allow the polymer to act as an etch res…
Abstract L(+)Glutamic acid hydrochloride [HOOC (CH 2 ) 2 CH(NH 2 ) COOH·HCl], a monoamino dicarboxylic acid salt of L‐Glutamic acid was synthesized and the synthesis was confirmed by FTIR analysis. Solubility of the material in water was determined. Pure and Thiourea doped L‐Glutamic acid hydrochloride crystals were g…
We report the characterization of early aggregates in the self-assembly of prion peptides using nonlinear and ultrafast time-resolved fluorescence spectroscopy. The dye-labeled peptide and dye/peptide guest-host systems were used to demonstrate the feasibility of the new approach. By measuring the two-photon absorptio…
Abstract Site preference of Cr in the M‐type barium ferrite ceramics was monitored by powder X‐ray diffraction (XRD), magnetization measurements and Mössbauer spectroscopy. The calcined BaFe 12– x Cr x O 19 powders ( x = 0.0–0.8) obtained by the sol gel method were die‐pressed into pellets and then sintered at 1300 °C…
Abstract A self‐consistent LUC (large unit cell) formalism on the basis of semiempirical INDO (intermediate neglect of differential overlap) Hamiltonians has been used to study the electronic properties of diamond and to investigate the pressure dependence of these properties. The calculated properties are in good agr…
Novel cylindrical polymer brushes consisting of a highly cis-transoidal poly(phenylacetylene) main chain and either polystyrene (PS) or poly(methyl methacrylate) (PMMA) side chains were synthesized by the macromonomer method. Two phenylacetylene-terminated macromonomers, namely, M−PS ( M n = 1830) and M−PMMA ( M n = 1…
Bi–Sb–Te thin films were prepared for p-type thermoelectric material in micro Peltier cooling devices. Films with four different compositions were elaborated by co-sputtering of BiSb(1:3) alloy and Te targets. Rapid thermal annealing was carried out for the improvement of thermoelectric properties of the as-grown film…
Supramolecular triad assemblies consisting of a central trisbipyridine ruthenium(II) chromophore (C2+) with one or more appended phenothiazine electron donors (D) and a diquat-type electron acceptor (A2+) have been shown to form long-lived photoinduced charge separated states (CSS) with unusually and consistently high…
Abstract A new set of electronegativity (EN) scale for all trivalent lanthanides (Ln) is proposed on the basis of effective ionic potential, from which the electron‐attracting power of trivalent Ln can be well differentiated. This new scale can be used to qualitatively explain the valence stability and valence change…
Abstract By directional solidification, single crystal of Sulphamic acid (SA) was successfully grown from aqueous solution by Sankaranarayanan‐Ramasamy (SR) method. A vertically designed L‐bend was used to avoid the effect due to spurious nucleation. A vertical bottom‐seeded ampoule was used for the growth of single c…
Abstract The nucleation of protein crystals is reconsidered taking into account the specificity of the protein molecules. In contrast to the homogeneous surface properties of small molecules, the protein molecule surface is highly inhomogeneous. Over their surfaces proteins exhibit high anisotropic distribution of pat…
Abstract Potassium dihydrogen phosphate (KDP) crystals doped with xylenol orange (XO) and methylthymol blue (MTB) are grown from aqueous solutions by the method of solvent evaporation at room temperature under the conditions of natural convection and by the method of temperature lowering. Studied is the influence of t…
A highly regular hexapod-like structure of PbS with six symmetric arms has been synthesized by a simple and mild chemical solution route. The hexapod-like PbS structure was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and high-resolution TEM (HRT…
A spin-dimer analysis of the anisotropic spin-exchange interactions in the distorted wolframite-type oxides CuWO4, CuMoO4-III, and Cu(Mo(0.25)W(0.75))O4 was performed by Koo and Whangbo (Inorg. Chem. 2001, 40, 2161-2169). For Cu(Mo(0.25)W(0.75))O4, a magnetic structure with a magnetic unit cell doubled along the a and…
ZnO 3D hierarchical architectures with hexagonal shape and uniform size have been successfully synthesized with the assistance of sodium malate by a simple hydrothermal process. Scanning electron microscopy (SEM) images show that the hexagonal particles are composed of platelet-like nanoparticles that are orderly arra…
Using dielectric spectroscopy, we probe the structural relaxation processes in thin freely suspended polystyrene films. For thin films we observe a relaxation scenario distinctly different from that of bulk polystyrene. The main glass transition relaxation becomes faster with decreasing film thickness, indicating a re…
The rate of n -hexane reactions with O 2 increased in parallel with the concentration of hexyl hydroperoxide (ROOH) intermediates and with the number of Mn redox sites in microporous MnAPO-5 and MnAPO-18 catalysts. These data confirmed the catalytic nature of oxidation pathways and the mechanistic resemblance between…
Over the past 10 years, the supereleastic nickel-titanium alloy Nitinol has found widespread application in the manufacture of small-scale biomedical devices, such as self-expanding endovascular stents. Although conventional stress/strain-life (S/N) analyses are invariably used as the primary method for design against…
Mono- and di-carboxyadamantane derivatives were intercalated via ion-exchange procedure onto hydrotalcites with formula [Zn0.65Al0.35(OH)2](A)0.35·nH2O where A is Cl– or ClO4–. Furthermore, an intercalation compound of [Mg0.65Al0.35(OH)2](CO3)0.175·0.5H2O containing the mono-carboxyadamantane has been obtained by usin…
A novel class of bent-core molecules with oligo(siloxane) or carbosilane units at both ends was synthesized and the self-organization of these molecules was investigated by polarizing microscopy, DSC, X-ray scattering, dielectric and electrooptical methods. Depending on the size of the silicon-containing segments, sme…