Materials Literature
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One-dimensional (1D) metal-oxide nanostructures are ideal systems for exploring a large number of novel phenomena at the nanoscale and investigating size and dimensionality dependence of nanostructure properties for potential applications. The construction and integration of photodetectors or optical switches based on…
Abstract In this study, we prepared novel amphiphilic phenyl–polysucrose microspheres by a two‐step pathway. Crosslinked polysucrose microspheres were synthesized with soluble polysucrose and epichlorohydrin by inversed suspension polymerization first. Then, phenyl–polysucrose microspheres were obtained through the re…
Abstract We report on the use of alternating crystallization for deposition of layers of different (though closely related) proteins in a single crystal. Investigations were carried out with the unique protein couple consisting of two forms of ferritin, apoferritin and holoferritin from horse spleen, which, despite be…
Abstract Transparent and nearly colorless ferroelectric‐ferroelastic β′‐Tb 2 (MoO 4 ) 3 (TMO) single crystals have been grown by the Czochralski (CZ) method. The single crystal structure was investigated by X‐ray powder diffraction and was shown to be a single phase with the structure similar as the β′‐Gd 2 (MoO 4 ) 3…
Abstract Electrochemically synthesized polypyrrole thin films doped with glutamic ions were investigated as interesting materials for potential use as molecularly selective surfaces. Pyrrole and glutamate interact in aqueous solution, resulting in the formation of a prominent band at 240 nm in the absorption spectra o…
Resonance energy transfer (RET) from the visible emission of core−shell ZnO:MgO nanocrystals to Nile Red chromophores, following band gap excitation in the UV, has been investigated for four different nanocrystal sizes. With use of steady state and time-resolved fluorescence spectroscopic measurements the wavelength d…
Dielectric properties have been investigated and compared for three series of ceramic compounds based on complex oxides with molecular formula Ba6 − 3x Ln8 + 2x Ti18O54 with Ln (lanthanide) = Sm, Nd and Gd and x = 0.0 – 0.7. X-Ray diffraction (XRD) was employed to study the crystal structure of the sintered ceramics.…
Polycrystalline CdSSe nanowires were prepared with a low-temperature physical evaporation method. Structural analysis combining HRTEM with XRD demonstrate that these as-prepared wires have a hexagonal wurtzite structure with a polycrystalline nature. Locally excited optical measurements show that though these wires ca…
We show by extensive first-principles calculations that an $n$- to $p$-type transition in epitaxial bilayer graphene can be induced by applying bias voltage on C-terminated SiC substrate, but cannot occur on Si-terminated SiC. Bias voltage can cause enough charge transfer between top and bottom graphene layers on C-te…
The crystal structure, optical absorption, and photoluminescence of chromium impurity centers were studied in nanocrystalline SrTiO(3):Cr (0.1 mol%) powders with average particle size within the range 13-100 nm prepared by the Pechini-type polymeric sol-gel method. Only the presence of a cubic perovskite phase of O(h)…
Abstract The surface properties of two perfluoroalkylethyl acrylic copolymers—aqueous, Zonyl ® 329 and solvent‐based, Zonyl ® 225—were studied. Zonyl ® 329 is a water‐based dispersion and Zonyl ® 225 a solvent‐based copolymer solution; both polymers have the same perfluoroalkyethyl side chains [F(CF 2 ) n CH 2 CH 2 ]…
The bifunctional ligand catechol-4,5 dithiol, H(2)Dtcat, has been synthesized, and the structure of the bis Br(-) adduct, (HS)(2)C(6)H(2)(OH)(2).2Ph(4)Br.H(2)O, has been determined. The syntheses, molecular structures, electronic structures, and magnetic properties of the monoanionic [(Dtcat(2-))(2)M](-), (M = Ni, V a…
Abstract Double‐walled carbon nanotubes (DWCNTs) and multiwalled carbon nanotubes (MWCNTs) were modified using melamine to attach NH 2 to the surface of these fillers, without previous oxidation of their graphene layers. FT‐Raman, elemental (chemical) and thermogravimetric analysis, confirmed the modification, which…
Abstract The composition, the thermal properties, and the kinetics of the thermo‐oxidative degradation of high‐density polyethylene (HDPE) were studied as a function of the increasing crystalline fraction, which resulted from the selective extraction of the amorphous part, through digestion by immersion in fuming nitr…
Abstract The Fourier‐transform infrared and Fourier‐tranform Raman spectra of phenyl phosphate disodium salt were recorded and analyzed. The surface‐enhanced Raman scattering (SERS) spectrum was recorded in a silver colloid. The vibrational wavenumbers of the compound were computed using the Hartree–Fock/6‐31G* basis…
CuCl and bis(diphenylphosphanyl)methane (dppm) react in the presence of small amounts of FeCl(3) with PhSeSiMe(3) and Se(SiMe(3))(2) to yield [Cu(30)Fe(2)Se(6)(SePh)(24)(dppm)(4)]. The crystal structure of the compound was determined by single-crystal X-ray analysis to give a mixed copper selenide/selenolate cluster m…
Abstract High‐molecular‐weight poly(vinyl alcohol) (PVA)/sodium alginate (SA)/ silver nanocomposite was successfully prepared via electrospinning technique. Water‐based colloidal silver in a PVA/SA blend solution was directly mixing without any chemical and structural modifications into PVA/SA matrix to form an organi…
Abstract The dependence of shear strength of epoxidized natural rubber (ENR)‐based adhesives on molecular weight of the rubber is studied using coumarone–indene resin, gum rosin, and petro resin as tackifiers. The adhesive was coated on polyethylene terephthalate (PET) film substrate using a SHEEN hand coater at vario…
Abstract In this paper, high‐quality sapphire crystal grown by an improved Kyropoulos‐like method, was irradiated by low‐energy neutron (i.e. high proportion of thermal neutron) with various flux (low: 7.5×10 15 n/cm 2 , medium: 7.0×10 16 n/cm 2 and high: 3.8×10 17 n/cm 2 ). The characteristic features of neutron flue…
Irradiation of methyl 3-methoxyl-2-naphthoate (2,3-NA) with lambda > 280 nm results in photocyclodimerization to produce cubane-like photocyclodimer 1 and the [4 + 4] intermediate 2. The optically pure enantiomers of the intermediate 2 have been achieved by high-performance liquid chromatography (HPLC) resolution on a…