Materials Literature
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Numerous studies of the ionic conductivities in oxide-doped chalcogenaide glasses have shown the anomalous result that the ionic conductivity actually increases significantly (by more than a factor of 10 in some cases) by the initial addition of an oxide phase to a pure sulfide glass. After this initial sharp increase…
Bi 2 Se 3 nanosheets with thicknesses of 50−100 nm have been successfully synthesized by a simple microwave heating method using selenium powder, Bi(NO 3 ) 3 ·5H 2 O, HNO 3 aqueous solution, ethylenediamine or ethylene glycol, and an ionic liquid 1- n -butyl-3-methylimidazolium tetrafluoroborate. The effects of experi…
A series of nonlinear optical chromophores based on configurationally locked polyene are synthesized, and the single crystal growth from the melt are investigated. The chromophores consist of a π-conjugated hexatriene bridge between the dialkylamino or methoxy electron donors and the dicyanomethylidene electron accept…
The solubilities of tetracycline hydrochloride, moxifloxacin hydrochloride, and ciprofloxacin hydrochloride were measured in several solvents, such as water, ethanol, 2-propanol, and acetone, in the temperature range of 293.15−323.15 K for ciprofloxacin.HCl and moxifloxacin.HCl and 288.15−310.15 K for tetracycline. Al…
The effect of progressive extension on the structure of human skin has been studied by scanning electron microscopy. Varying degrees of strain were imposed on abdominal skin specimens by a carefully controlled mechanical testing technique. Progressive straining has a two‐stage effect on the epidermis: initial extensio…
Reactions of laser-ablated Mn, Fe, Co, and Ni atoms with H(2)O(2) and with H(2) + O(2) mixtures in excess argon give new absorptions in the O-H and M-O stretching regions, which are assigned to metal dihydroxide and trihydroxide molecules, M(OH)(2) and M(OH)(3). Isotopic substitutions (D(2)O(2), (18)O(2), (16,18)O(2),…
Phenanthrene was adsorbed from ethanol solution to the surface of single wall carbon nanotubes, which were previously physically and chemically characterized. Different anionic surfactants were added in the solutions to enhance the phenanthrene solubility and apparently have also improved the dispersion of two respect…
Thermal breakdown and oxidation of JP-10 ( exo -tetrahydrodicyclopentadiene, C 10 H 16 ), in the presence of nanoparticulate CeO 2 and Fe 2 O 3, was studied in a small alumina flow-tube reactor on time scales around 1 ms. Decomposition products were analyzed by an in situ mass spectrometer. In the absence of any oxidi…
Abstract Perylene dyes are key chromophores in dyestuff chemistry. The solubility, absorption, and emission behavior of this class of materials can be efficiently controlled by functionalization using a variety of different synthetic procedures. Moreover, these chemical modifications have allowed their widespread appl…
An understanding of the interaction between ceria and environmentally sensitive molecules is vital for developing its role in catalysis. We present the structure and energetics of CO adsorbed onto stoichiometric (111), (110), and (100) surfaces of ceria from first principles density functional theory corrected for on-…
Crack patterns in a layer of laponite gel allowed to dry in a static electric field are studied. Crack patterns in natural and synthetic clays have been studied extensively with interesting results. This is the first report of such an observation in a radial electric field. The nano-sized disc-like laponite particles…
A MOKE magnetometry unit simultaneously sensitive to both in-plane magnetization components, based on an intensity differential detection method, allows us to observe the uniaxial anisotropy impressed during CoFe-deposition and to discriminate the magnetization processes under a magnetic field parallel and perpendicul…
Differences in the dynamic skin friction coefficients (mu) were investigated with respect to age, sex, and anatomical region. A total of 29 volunteers consisting of seven young females, seven old females, seven young males, and eight old males participated in the study. Measurements were obtained from II anatomical re…
Here we report a site-specific sequential nucleation and growth route to the systematic building of hierarchical, complex, and oriented ZnO micro/nanostructures in solution nanosynthesis. Structures and morphologies of the products were confirmed by results from X-ray diffraction and scanning electron microscopy studi…
Abstract We report systematic magnetic measurements on organic superconductor κ‐(BEDT‐TTF) 2 Cu[N(CN) 2 ]‐Br. The irreversibility line H irr (T) and the critical current density J c were studied. Our results show the strong dependence of H irr (T) and J c on the cooling rate. The H irr (T) data follow power dependence…
Abstract The effect of molecular weight on the rheological properties in the molten state has been studied for binary blends of high‐density polyethylene obtained by the Zieglar–Natta catalyst and low‐density polyethylene produced in an autoclave process. The blends composed of high‐density polyethylene with a high mo…
Abstract The effect of applied processing history and postprocessing annealing treatment on the rheological properties has been studied for a binary blend composed of linear low‐density polyethylene (LLDPE) and low‐density polyethylene produced by radical polymerization (LDPE). It has been found that intensive process…
Abstract Carbon/carbon composites were made through the pyrolysis of stabilized PAN felt and phenolic resin with the addition of 5 or 10 wt % carbon black to the matrix and then heat treatment at 600–2500°C. The effects of adding carbon black to the matrix precursor on the physical properties, microstructure, and mech…
Abstract The effects of deficiency in praseodymium and in strontium upon the magnetic and magneto‐transport properties of lacunar Pr 0.8–x □ x Sr 0.2 MnO 3 and Pr 0.8 Sr 0.2–x □ x MnO 3 oxides have been investigated. Our synthesized samples have been elaborated using the conventional solid state reaction at high tempe…
Abstract Polyvinylsilicone oil with condensed aromatics (called C 1 gum) was synthesized by Diels‐Alder reaction of polyvinylsilicone oil and acenaphthenecyclone, and was used as an additive in heat‐curable silicone rubber. The resistance to irradiation of the silicone rubber obtained was investigated by γ‐rays at dos…