Materials Literature
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A new double chained surfactant, 2-octyl-dodecanoyl-6-O-ascorbic acid (8ASC10), with a L-ascorbic acid unit as the polar headgroup was synthesized for the first time. The behavior of the compound in the dry solid state has been characterized through DSC, XRD, and SAXS measurements. The surfactant forms stable viscous…
Abstract Periodic deflections of infrared probe are observed in TlGaSe 2 after lateral excitation with optical pulse. The effect is explained by generation of photoacoustic dilatational wave, which propagates within the crystal. Low pulse fluence (0.01 mJ/cm 2 ) is needed to induce such wave when the layer plane is ex…
We investigated the electronic and optical properties of rock-salt aluminum nitride (AlN) using a first-principles method based on the plane-wave basis set. Analysis of the band structure shows that rock-salt aluminum nitride is a wide gap indirect semiconductor. The band gap is predicted to be 5.82 eV within the scre…
High pressure Raman spectra and in situ electrical conductivity measurement of scheelite-structure PbMoO 4 have been conducted using a diamond anvil cell (DAC). The Raman spectra of powdered PbMoO 4 were determined up to 26.5 GPa under nonhydrostatic conditions. The results indicate that PbMoO 4 undergoes a transition…
A room-temperature magnet of V[MeTCEC]2·0.6(CH2Cl2) composition (MeTCEC = methyl tricyanoethylenecarboxylate) is formed by the reaction of MeTCEC and V(CO)6 (see figure). Analysis of the magnetization indicates a less disordered structure of V[MeTCEC]2·0.6(CH2Cl2) with respect to similarly synthesized V[TCNE]x·0.34(CH…
The structural modifications of SnO within the tetragonal phase (α-SnO) and the orthorhombic phase (y-SnO) with pressure were extensively studied by using the first-principles pseudopotential plane-wave method within the generalized gradient approximation. A structural phase transition from α-SnO to γ-SnO is predicted…
Abstract The structures and the electronic states in electrodeposited semiconductor Cu–O thin films have been investigated for each annealing temperature ( T A ) by X‐ray diffraction (XD) and X‐ray absorption spectroscopy (XAS) near the Cu K edge using synchrotron radiation. The thin films prepared as grown and anneal…
The electronic band structure, transport properties, and lattice dynamics in AuX2 (X = Al, Ga and In) under high pressure have been extensively studied with full potential linearized augmented plane wave and pseudopotential plane wave methods. The theoretical results for the electronic band structure and Fermi surface…
A new copper complex (2) has exhibited highly efficient catalytic activity of luminol chemiluminescence in water in the presence of ascorbic acid and dissolved O2 under conditions that conventional catalysts such as Cu(OAc)2, hemin or cyclen-Cu(II) did not show significant activity.
Abstract Various micronized polytetrafluoroethylene (PTFE) powders were compounded with silicone rubber (MQ) and mechanical properties of the MQ/PTFE composites were evaluated. The fracture surface morphologies of prepared composites were also investigated using scanning electron microscopy (SEM). At a level of only 5…
Using molecular static calculations with the quantum corrected Sutten-Chen-type many-body potential, we have studied the stress and strain characteristics in nickel nanowires along [100], [110], and [111] crystallographic orientations under the equilibrium state. The main focus of this work is the size-dependent effec…
A series of dihydropyrenes with appending fluorescent moieties were synthesized with the objective of increasing the photochromic efficiency for this class of compounds and to establish how suitable fluorescence would be to follow their photochromic behavior. The ring opening quantum yields of dihydropyrenes with aroy…
We have investigated the perturbed electronic states and energy relaxation dynamics of a series of phenylene bridged Zn II porphyrin dimers to reveal the effects of phenylene bridges by using computational and time-resolved spectroscopic methods. The electronic states of Zn II porphyrin dimers are largely perturbed by…
The structural transition of Gd2O3 nanoparticles induced by high pressure, Chen, Haiyong, He, Chunyuan, Gao, Chunxiao, Ma, Yanmei, Zhang, Jiahua, Wang, Xiaojun, Gao, Shiyong, Li, Dongmei, Kan, Shihai, Zou, Guangtian
An efficient, site-specific and scalable approach has been developed to produce high-quality and individually addressable conducting polymer nanowire electrode junctions (CPNEJs) in a parallel-oriented array. Polypyrrole and PEDOT conducting polymer nanowires (CPNWs) with uniform diameters (ca. 60-150 nm) were introdu…
Fabrication of an ultra-nanocrystalline diamond-coated silicon wire array with enhanced field-emission performance, Tzeng, Yu-Fen, Liu, Kao-Hsiang, Lee, Yen-Chih, Lin, Sue-Jian, Lin, I-Nan, Lee, Chi-Young, Chiu, Hsin-Tien
The amidase from Geobacillus pallidus RAPc8, a moderate thermophile, is a member of the nitrilase superfamily and catalyzes the conversion of amides to the corresponding carboxylic acids and ammonia. It shows both amide-hydrolysis and acyl-transfer activities and also exhibits stereoselectivity for some enantiomeric s…
A novel dinuclear zirconium sandwich-type silicotungstate cluster of [(gamma-SiW(10)O(36))(2)Zr(2)(mu-OH)(2)](10-) (1) was synthesized by the reaction of a divacant lacunary gamma-Keggin silicotungstate [gamma-SiW(10)O(36)](8-) with ZrOCl(2).8H(2)O. The anion consisted of two [gamma-SiW(10)O(36)](8-) units sandwiching…
The packing structures and packing effects on excitation energies of oligomers of polyfuran (PFu), polypyrrole (PPy), polycyclopentidene (PCp), polythiophene (PTh), polyphosphole (PPh), and polysilole (PSi) are comparatively studied by employing molecular dynamics (MD) simulations and time-dependent density functional…
Cationic polyfluorene colloids are prepared and adsorbed on cellulose to obtain fibers and paper sheets with high photoluminescence (see figure). The oxidative pretreatment of cellulose allows the tailoring of the fiber uptake capacity of polyfluorene colloids and the final photoluminescence intensity. Paper sheet str…