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。
Piezoelectric materials lie at the heart of ultrasonic transducers. For transducers used in medical imaging (3-7 MHz), PZT-5H ceramics offer high electromechanical coupling (k33≥ 75%), resulting in good bandwidth and sensitivity. As transducer arrays become smaller with increasing frequency, the development of high pe…
By combining transmission electron microscopy (TEM) and atomic force microscopy (AFM), the annealing behavior of polyethylene (PE) single crystals exhibited when annealed on highly oriented pyrolytic graphite (HOPG) was investigated. Morphologically, fibrils were formed and ordered in the form of a leaf venation in an…
Ceramics in a PZT–PCN system with the formula (1- x )Pb(Zr 1/2 Ti 1/2 )O 3 –( x )Pb(Co 1/3 Nb 2/3 )O 3 , where x = 0.1–0.5, were prepared using a solid-state mixed-oxide technique (the columbite-wolframite precursor method). The phase formation behavior and microstructure were studied using X-ray diffraction (XRD) ana…
Abstract Diphenyl disulfide is a common agent used in the devulcanization of sulfur‐vulcanized goods. Its activity has been tested both in real rubber samples and in model molecules but, to the best of our knowledge, always under normal heating conditions. Moreover, there is a lack of information about how the vulcani…
A semiclassical Monte Carlo simulation was run to estimate the performances of a monolayer and a bilayer (with vertical electric field of 1 V/nm applied) graphene-channel field-effect transistor (FET). The vertical field produces a band gap of 0.16 eV and gives semiconductive properties in the bilayer graphene. Electr…
Data for long-term marine immersion and half-tide corrosion loss and pitting of chromium-bearing and stainless steels is systematically re-examined and re-interpreted to show that it is consistent with the model previously proposed for mild and low-alloy steel corrosion. Early corrosion of chromium-bearing steels is w…
PEGylated liposomes (approximately 100 nm in diameter) lose their long-circulating characteristic upon repeated injection at certain intervals in the same animal (referred to as the "accelerated blood clearance (ABC) phenomenon"), as described by our group and by researchers in the Netherlands. Recently, it was demons…
ZnO thin films prepared by magnetron sputtering on c-plane sapphire may exhibit a columnar growth with an average column diameter depending on the deposition temperature. In this case two epitaxial relationships coexist and adjacent columns are rotated, one from the other, by 90° around the [0001] direction. The long…
Abstract Low-charge beidellites were synthesized by a hydrothermal treatment applied to an amorphous gel phase in basic solution. The hydrothermal conditions for the syntheses were chosen from the stability field of beidellite previously investigated in the literature. The synthetic samples were characterized chemical…
Detonation of landmines buried to different depths in water‐saturated sand is analyzed computationally using transient non‐linear dynamics simulations in order to quantify impulse loading. The computational results are compared with the corresponding experimental results obtained using the Vertical Impulse Measurement…
A detailed analysis of absorption, transmission, and reflection spectra of virgin and gamma-irradiated (50–800 kGy) polycarbonate polymer reveals that both indirect as well as direct band gap coexist in virgin and gamma-irradiated samples. The indirect band gap has been found to decrease from 3.00 eV (virgin sample) t…
Abstract The microstructure of oxide films formed on Zircaloy-4 and Alloy No. 3, which has a composition similar to ZIRLO™, was investigated by high resolution transmission and scanning electron microscopy, and by scanning probe microscopy after corrosion tests performed at 360°C/18.6 MPa in deionized water or lithiat…
The properties of an ensemble of densely packed metallic nanoparticles and the effective material properties of a metamaterial based on them are studied in detail using rigorous diffraction theory. We show that in the spectral vicinity of the plasmon resonance, the metamaterial shows a well-defined Lorentzian resonanc…
Total energy calculations within the Density Functional Theory have been carried out in order to investigate the structural, electronic, and optical properties of un-doped and doped silicon nanostructures of different size and different surface terminations. In particular the effects induced by the creation of an elec…
H atoms, O atoms, and OH radicals were identified in the catalytic decomposition of H2∕O2 mixtures on heated polycrystalline tungsten surfaces. In order to suppress the oxidization of the tungsten catalyzer surfaces, the H2∕O2 pressure ratio was kept more than 83, while the catalyzer temperature was kept below 2000K.…
Abstract Ionic liquids intercalated in kaolinite constitute a novel class of nanostructured material. Kaolinite-pyrrolidinium halide intercalates have been prepared successfully by reacting the pyrrolidinium salts with kaolinite which was preintercalated with dimethyl sulfoxide (DMSO) using the melt condition under N…
We have investigated the influence of the plasmon resonances of individual, spatially isolated gold nanoparticle aggregates on their emission properties using combined optical confocal and dark field scattering microscopy and spectroscopy. The emission intensity of the same aggregate is enhanced by up to 1 order of ma…
Abstract Combining the spray pyrolysis and the sol–gel techniques gives the possibility to produce Fluorine doped Tin oxide (SnO 2 :F) thin films. Transparent conducting SnO 2 :F thin films have been deposited on glass substrates by the spray pyrolysis technique. This technique for the fabrication of SnO 2 :F filmsby…
Darwin (1881) was one of the first scientists to formally record that earthworms excrete calcium carbonate granules, with some up to 2 mm in diameter. However, since Darwin’s studies they have received relatively little attention. The function of the granules remains a mystery, but may be related to regulation of Ca,…
Phenomenological crystallographic theory of martensitic transformation was applied to the phase transition of PRAM (phase-change random access memory) Ge2Sb2Te5 alloy for the first time. The speedy structural transition of Ge2Sb2Te5 from cubic to hexagonal phases could be well described by a shearing transformation fr…