Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
A simple and high-yield synthetic route was developed to synthesize the different-shaped PbTiO3 powders. Spherical, rod, and cubic shapes of PbTiO3 were achieved from the precursors of spherical and rod TiO2/K2Ti4O9 compounds with PbO in the NaCl-KCl melts at the temperatures from 700 to 900 degrees C, respectively. R…
Abstract The creep behavior of poly(propylene)–multi‐walled carbon nanotube (MWNT) composites has been studied with short term tensile creep tests at different temperatures and is discussed in relation to the structural characteristics determined by AFM, DSC, and polarized light microscopy. Master curves of creep comp…
A simple hot colloidal method of preparing ZnTe nanowires is presented. Nanowire morphology was controlled by varying the identity of the amine cosurfactant in the growth solution. This produced smooth, brushlike, and multibranched brushlike structures in high yield. Nanowires appear to form via an oriented attachment…
Single-wall carbon nanotubes (SWNTs) are well dispersed in water using a polymer, polyvinylpyrrolidone (PVP), a surfactant, sodium dodecyl benzene sulfonate (SDBS), and brief low-power sonication. The concentration of these pristine SWNT dispersions are quite high, approaching 1 g/L, and remain stable over several mon…
Cholera toxin subunit B (CTB)--quantum dot conjugates were developed for labeling mammalian cells. The conjugates were internalized by all tested cell lines into small vesicles dispersed throughout the cytoplasm, while commercially available polyarginine conjugates rapidly accumulated in large perinuclear endosomes. A…
Silver telluride nanotubes have been prepared by the hydrothermal process without a template or a surfactant. The as-prepared sample was characterized by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectra, and Raman spectra. The structural phase transition of the sample was observed. A ro…
We describe a process for transferring trioctylphosphine oxide-stabilized CdSe semiconductor nanocrystals (CdSe/TOPO quantum dots, QDs) from toluene into water through a ligand exchange process with a poly(ethylene glycol- b -2- N,N -dimethylaminoethyl methacrylate) (PEG- b -PDMA) diblock copolymer. In this polymer, t…
Polymandelide, an aryl analogue of polylactide, was synthesized by the ring-opening polymerization of mandelide, the cyclic dimer of mandelic acid. The poor solubility of rac -mandelide limited the synthesis of polymandelide via solution polymerization, but polymerization of mandelide at 70 °C as a heterogeneous slurr…
A novel carbon fiber‐reinforced ZrB 2 –SiC matrix composite was fabricated by heaterless chemical vapor infiltration through infiltration of SiC matrix into a carbon fiber‐ZrB 2 powder preform. The C/ZrB 2 –SiC composite presented a flexural strength of 148 MPa, a fracture toughness of 5.6 MPa·m 1/2 , and a good oxida…
The hydrogenation kinetics of Mg is slow, impeding its application for mobile hydrogen storage. We demonstrate by ab initio density functional theory (DFT) calculations that the reaction path can be greatly modified by adding transition metal catalysts. Contrasting with Ti doping, a Pd dopant will result in a very sma…
Coating of polysuccharide (PS) generated by hydrothermal treatment of glucose on Stöber's silica particles was examined. Uniform surface coverage of PS was achieved when the silica particles, the surfaces of which had been modified with amino groups, were mixed during the hydrothermal reaction of glucose. On the other…
Densely grafted brushes with polyacrylonitrile (PAN) di- (AB) and triblock (ABC) copolymer side chains were synthesized first time by ATRP using the “grafting from” technique. Tapping-mode atomic force microscopy showed that these brushes displayed wormlike shapes on mica surface. A necklacelike structure was observed…
Resonant grating filters are promising components for free-space narrowband filtering. Unfortunately, due to their weak angular tolerance, their performances are strongly deteriorated when they are illuminated with a standard collimated beam. Yet this problem can be overcome by resorting to a complex periodic pattern…
Recent investigations address transport through ballistic charge-neutral graphene strips coupled to doped graphitic leads. This paper shows that identical transport properties arise when the leads are replaced by quantum wires. This duality between graphitic and metallic leads originates in the selection of modes with…
Recently, a homogenization procedure has been proposed, based on the tight lower bounds of the Bergman-Milton formulation, and successfully applied to dilute ternary nanocomposites to predict optical data without using any fitting parameters [Garcia et al. Phys. Rev. B, 75, 045439 (2007)]. The procedure has been exten…
We have investigated by (27)Al nuclear magnetic resonance spectroscopy some compositions in the Ln(2)O(3)-Al(2)O(3)-SiO2 (Ln = Y or La) ternary phase diagram containing more than 60 mol % of SiO2. One- and two-dimensional high-field (17.6 T) high-speed (30 kHz) magic angle spinning experiments have been performed alon…
Clearly superior resistance: Flexible, conductive, transparent single-walled carbon nanotube composite films (see picture) have been prepared by inkjet printing of nanotube dispersions. A single printed layer exhibited sheet resistance of 100 kΩ per square at 85 % optical transparency. The films display sensitivity to…
Aluminum hydride (alane) AlH_3 is an important material in hydrogen storage applications. It is known that AlH_3 exists in multiply forms of polymorphs, where $α$-AlH_3 is found to be the most stable with a hexagonal structure. Recent experimental studies on $γ$-AlH_3 reported an orthorhombic structure with a unique d…
The 18.5 K superconductor PuCoGa5 has many unusual properties, including those due to damage induced by self-irradiation. The superconducting transition temperature decreases sharply with time, suggesting a radiation-induced Frenkel defect concentration much larger than predicted by current radiation damage theories.…
This work uses density functional molecular dynamics simulations of fluid helium at high pressure to examine how shock wave experiments with precompressed samples can help characterizing the interior of giant planets. In particular, we analyze how large of a precompression is needed to probe a certain depth in a plane…