Materials Literature
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We present a streamlined limiting case of the theory of Oritz & Repetto for crystals with microstructure in which the crystals are assumed to exhibit infinitely strong latent hardening. We take this property to signify that the crystal must necessarily deform in single slip at all material points. This requirement int…
The aim of this study was to show that multilayer fractal Brunauer−Emmett−Teller (mfBET) theory can be used as a tool to obtain information about the distribution of water in cellulose powder particles of varying crystallinity. Microcrystalline cellulose, agglomerated micronized cellulose, low-crystallinity cellulose,…
We analyze the temporal fluctuations of the flow field associated with a shear-induced transition in a lyotropic lamellar phase: the layering transition of the onion texture. In the first part of this work [Salmon et al., Phys. Rev. E 68, 051503 (2003)], we have evidenced banded flows at the onset of this shear-induce…
Porphyrin macrocycles composed of five and six units of m-gable imidazolylporphyrinatozinc (1-Zn) were synthesized by self-assembled cyclization followed by ring-closing metathesis linkings. Each porphyrin macrocycle was isolated by GPC chromatography, and their molecular weights were determined by MALDI-TOF mass spec…
Strong photoluminescence bands range from 300 to 600 nm at room temperature have been observed in anodic alumina membranes (AAM). It was found that the photoluminescence (PL) intensity and peak position of AAM depend strongly on the excitation wavelength, and the PL intensity of AAM prepared in C 2 H 2 O 4 is much hig…
We use a density-functional based tight-binding method to study diamond growth by ${\mathrm{C}}_{2}$ on a nonhydrogenated diamond $(100)\ensuremath{-}(2\ifmmode\times\else\texttimes\fi{}1)$ surface. The study is motivated by advances in the growth of ultrananocrystalline diamond (UNCD) films under hydrogen-poor condit…
Photoinduced effect in a ferromagnetic perovskite ${\mathrm{La}}_{0.6}{\mathrm{Sr}}_{0.4}{\mathrm{MnO}}_{3}$ was investigated by femtosecond pump-probe spectroscopy. By utilizing magneto-optical Kerr rotation as a probe, the photoinduced dynamics of the spins was observed independently of the quasiparticle relaxation…
Abstract Novel temporary protective coatings were prepared by the addition of release additives to waterborne polyurethane dispersions. New types of self‐crosslinkable sulfourethane–silanol (SUS) dispersions were utilized as the peelable coatings. These dispersions are stable, low‐volatility organic chemical (VOC) wat…
A disk-shaped molecule, N-(5-sorbyl-pentyl)-N',N"-di(n-octyl)benzene-1,3,5-tricarboxamide (1), has been synthesized and assembled into a columnar stack in cyclohexane. Using a photoinitiated process, we polymerized monomer 1 in its self-assembled state and analyzed the resulting poly-1. On cooling a boiling cyclohexan…
We have measured the thermoelectric power (TEP) and Coulomb charging characteristics of an individual p-type semiconducting single-wall carbon nanotube (SWNT) in the quantum dot regime. The TEP measured as a function of gate voltage oscillates around a baseline value that is first positive and becomes more negative as…
The electrochemistry and electrogenerated chemiluminescence (ECL) of two ter(9,9-diarylfluorene)s, TDAFs, were investigated. The ECL from these new blue emitters produced by ion annihilation showed spectra with significant emission at longer wavelengths and was different from their fluorescence spectra. This was ascri…
The preparation of Y 2 O 3:Ln 3+ (Ln = Eu, Er; nominal 1−0.1 mol % doping) by the preformed sol method is reported. The comparison of the emission spectra with more concentrated samples prepared by flame spray pyrolysis and conventional spray pyrolysis shows that emission from 5 D 1 is quenched in the latter samples,…
The electron-transfer rate from methylene-bridged molecular adsorbates to SnO 2 semiconductor nanocrystalline film was systematically investigated for short bridge lengths. The synthesized sensitizers were the homologues of Re(CO) 3 Cl(dcbpy) [dcbpy = 4,4‘-dicarboxy-2,2‘-bipyridine] (ReC n A) with methylene units (CH…
A new low band gap polymer, poly(1,3-bis(2‘-[3‘,4‘-ethylenedioxy]thienyl)-benzo[ c ]thiophene- N -2‘ ‘-ethylhexyl-4,5-dicarboximide) P(DEDOT-ITNIm), was synthesized. Electrochemically prepared polymer films were very stable to overoxidation upon p-doping and stable upon n-doping. The low band gap of the polymer films,…
Three organic cations with a natural origin (L-carnitine, L-cystine dimethyl ester, and thiamine) were introduced at different loadings in the interlayer of a low-charge montmorillonite, and the performance of the modified clays as adsorbents of the herbicide simazine was investigated using batch adsorption-desorption…
The synthesis and detailed characterization of the new spin crossover mononuclear complex [Fe(II)(DAPP)(abpt)](ClO(4))(2), where DAPP = [bis(3-aminopropyl)(2-pyridylmethyl)amine] and abpt = 4-amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole, are reported. Variable-temperature magnetic susceptibility measurements and Mössbau…
The roughness of tetrahedral amorphous carbon (ta-C) films grown at room temperature is measured as a function of film thickness by atomic force microscopy, to extract roughness and growth exponents of alpha approximately 0.39 and beta approximately 0-0.1, respectively. This extremely small growth exponent shows that…
The structural evolution at 300 K of the series Sr x Ba 1− x SnO 3 and Sr x Ca 1− x SnO 3 at x = 0.2 intervals has been determined by powder neutron diffraction. All Sr x Ca 1− x SnO 3 samples ( x = 0–1) have the Pbnm superstructure. In the series Sr x Ba 1− x SnO 3 , the x = 1.0 and 0.8 samples have the Pbnm superstr…
Vinyl-functionalized ordered mesoporous silica can be prepared by co-condensation of tetraethoxysilane (TEOS) and triethoxyvinylsilane (TEVS) in the presence of the triblock copolymer Pluronic P123 (EO 20 PO 70 EO 20 ) and inorganic salts such as NaCl. At low molar percentage of 10% TEVS, the hexagonal structure analo…
Abstract Nanocomposites based on biodegradable poly(butylene succinate) (PBS) and layered silicates were prepared by melt intercalation. Nonmodified montmorillonite (MMT) and MMTs (DA‐M, ODA‐M, ALA‐M, LEA‐M, and HEA‐M) organo‐modified by protonated ammonium cations {i.e., those of dodecylamine, octadecylamine, 12‐amin…