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。
Absorption of pulsed laser light energy at the plasmon resonant wavelength of silica−gold core−shell nanoparticles results in a reshaping of the nanoparticle's metal shell layer. Dramatically distinct and reproducible changes in nanoparticle morphology occur as a function of laser pulse width in the femtosecond versus…
Epilithic, epiphytic and epipelic diatoms were sampled at four sampling stations monthly from June to October in three boreal rivers in South Finland to examine the seasonal community persistence and stability of diatom communities in three habitats. The variation of successive samples in ordination space using Non-Me…
Abstract FT‐Raman and FT‐IR spectroscopy and Raman microscopy were employed to identify the structural characteristics of one amorphous and three crystalline phases of nifedipine, a common antihypertension drug of the 1,4‐dihydropyridine family. A significant fraction of the nifedipine molecules in the glass are found…
Abstract Summary: A binary blend of poly ( L ‐lactide) (PLLA) and poly( ε ‐caprolactone) (PCL) of composition 70:30 by weight was prepared using a twin screw miniextruder and investigated by differential scanning calorimetry (DSC), optical microscopy and scanning electron microscopy (SEM). Ternary 70:30:2 blends were…
The effects of composition distribution on microphase-separated structures formed by monodisperse BAB triblock copolymers were investigated. Monodisperse nine parent BAB triblock copolymers consisting of polystyrene for A and poly(2-vinylpyridine) for B were prepared by anionic living polymerization. These nine copoly…
Abstract In-situ synchrotron wide-angle X-ray diffraction (WAXD) studies and simultaneous measurements of stress and strain during uniaxial stretching of various vulcanized rubbers were carried out (at room temperature and 0°C) to reveal the strain-induced molecular orientation and crystallization relationships. Rubbe…
Article Metallographische Gefügeuntersuchungen von Magnesiumlegierungen / The Metallographical Examination of Magnesium Alloys was published on May 1, 2004 in the journal Practical Metallography (volume 41, issue 5).
We have investigated the intrinsic defects in ZnO films grown by molecular beam epitaxy by annealing them in O 2 and N 2 atmosphere. We found that there is a good correlation between the annealing condition and photoluminescence characteristics. The results of annealing experiments suggest that the photoluminescence a…
Abstract Hybrid compounds consisting of an organic sensitizer and a polyoxometalate unit were synthesized following two strategies: a) the covalent functionalization of lacunary decatungstosilicate with organosilylfulleropyrrolidines; b) the charge interaction between cationic sensitizers and the polyoxoanions, yieldi…
In an effort to improve the physical accuracy of models of the thermodynamics of silicate melts, we describe a systematic study of the extent of modifying cation mixing, using 17 O 3QMAS NMR, in a series of Ca-Mg and K-Mg silicate glasses. The spectra for the mixed cation Ca 2-2x Mg 2x Si 2 O 6 glass show that only on…
Abstract The effect of clay loading on the mechanical behavior and melt state linear viscoelastic properties of intercalated polycarbonate (PC) nanocomposites was investigated. At low frequencies, the linear dynamic oscillatory moduli data revealed diminished frequency dependence with increasing nanoclay loading. The…
Due to their excellent thermal and mechanical properties silicon‐based ceramics and composites are prime candidates for high temperature structural applications. In this communication the authors report for the first time that amorphous silicoaluminum carbonitride (SiAlCN) ceramics possess anomalously high resistance…
In this study, vascular-like tubular tissues called biotubes, consisting of autologous tissues, were prepared using in vivo tissue engineering. Their mechanical properties were evaluated for application as a small-caliber artificial vascular prosthesis. The biotubes were prepared by embedding six kinds of polymeric ro…
Field emission displays (FED) are drawing attention as one of the most promising flat panel displays. Currently, the development stage of Spindt-type FEDs with Mo emitter is close to an end. The monocolor Spindt-type FEDs are being supplied to the market, and the color FEDs are ready for mass production. FED is also e…
Defect structures of plastically deformed nanocrystalline Pd investigated by high-resolution transmission electron microscopy are presented. Material with an average grain size of about 15 nm was prepared by inert-gas condensation, and this was plastically deformed by cold rolling up to a true strain of 0.32 at a stra…
The fast relaxation measured by quasielastic neutron and light scattering on the picosecond to nanosecond time scales when expressed as mean square displacement as a function of temperature shows a change in slope at or near the conventional glass transition temperature in a manner like those of the enthalpy and volum…
An ultra‐high‐temperature ceramic (UHTC) based on HfB 2 was produced. The microstructure consisted of fine and regular diboride grains (2 μm average size), with SiC particulate distributed intergranularly, not rarely in clustered formation, and low levels of secondary phases were identified. The resulting thermo‐mecha…
Demonstration of a 2.5-kV diamond diode is provided by electrical measurements using a circular gold Schottky contact, with an area >1 mm/sup 2/, on large area freestanding single-crystal diamond consisting of a thin high purity layer (1/spl times/0/sup 19/ [B]/cm/sup 3/) substrate with an ohmic back contact. The diod…
The parameters of reactive pulsed laser deposition were successfully optimized for fabrication of vanadium dioxide thin films. It is observed that the O2 concentration in Ar gas and the total deposition pressure are critical in stabilizing the single VO2 phase. Thermochromic VO2 and V1−xWxO2 (x=0.014) thin films were…
The blood-brain barrier (BBB) efficiently restricts penetration of therapeutic agents to the brain from the periphery. Therefore, discovery of new modalities allowing for effective delivery of drugs and biomacromolecules to the central nervous system (CNS) is of great need and importance for treatment of neurodegenera…