Materials Literature
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The crystallization of colloidal particles at an air-water interface is investigated by computer simulations. We numerically clarify the bond-orientational order parameter Phi(6) with different particle concentrations. In addition, the profiles of the pair-correlation function g(r), the orientational correlation funct…
The structural, electronic, and magnetic properties of the highly mismatched perovskite oxides, ${\mathrm{Th}}_{0.35}{A}_{0.65}{\mathrm{MnO}}_{3},$ where A is for the alkaline earth divalent cations (Ca, Ba, Sr), which are all characterized by the same large tolerance factor $(t=0.934),$ have been investigated by usin…
We report the preparation, absorption spectra, and photophysical properties (fluorescence spectrum, quantum yield, and lifetime) of five dendrimers of the poly(propylene amine) family (POPAMs) functionalized with dansyl units at the periphery. Each dendrimer n D, where n = 1 to 5 is the generation number, comprises 2…
A new strategy for the fabrication of wire/sheath nanocableswith an inner diameter as small as 6 nm is presented. Under the right conditions organic monomers with polar groups can self-organize into cylindrical supramolecules as shown in the Figure. After γ-irradiation, polymerization occurs to form polymer tubules, i…
We report the results of a systematic study on the temperature dependence of the normal state conductivity, measured along the a, b', and c* axis, in a representative set of Bechgaard salts.The anisotropic electron transport of four compounds are compared: (TMTSF)zC104, (TMTSF)zPF6, (TMTTF),Br and (TMTTF)2PF6.We analy…
During the solution reaction of NaBH4/(NH4)2SO4 in tetraglyme to form borazine, polymeric aminoborane (NH2BH2)x has been isolated as a white powder. The powder was characterized by thermal gravimetric analysis/differential scanning calorimetry, infrared and mass spectroscopies, and powder X-ray diffraction. Solid-stat…
(Pro-Pro-Gly)10 [(PPG10)], a collagen-like polypeptide, forms a triple-helical, polyproline-II structure in aqueous solution at temperatures somewhat lower than physiological, with a melting temperature of 24.5 degrees C. In this article, we present circular dichroism spectra that demonstrate an increase of the meltin…
Linear diffraction gratings that provide strongly asymmetric diffraction without surface modulation are created and studied. The spatial phase shift of the refractive-index grating relative to the absorption grating is the origin of nonreciprocal behavior.
Vacuum temperature-dependent ellipsometric studies on WO(3) thin films are reported at a single wavelength, lambda = 0.633 microm, and across a temperature range of 100 < T <or= 453 K. All the measurements were made in an optical cryostat fixed in the sample compartment of the ellipsometer. Experimental results involv…
The equations of Szendrei/Held for the radial crater growing process as a function of time can also be inverted to get the target strength Rt if the maximum crater radius rcm is known. With this method the strength was calculated for an aluminum target to 300 N/mm2 and for glass fiber reinforced plastic to 405 N/mm2,…
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text Ian Hodgkinson, Qi Hong Wu, Akhlesh Lakhtakia, and Russell Messier, "Linear and Circular Polarization Filters Using Sculptured Thin Films," Optics & Ph…
Abstract Poly(acrylonitrile‐butadiene‐styrene) (ABS)/polycarbonate (PC) blends reinforced with potassium titanate (K 2 Ti 6 O 13 ) whiskers were prepared in a twin screw extruder followed by injection molding. The whiskers were pretreated with tetrabutyl orthotitanate prior to compounding. The tensile, dynamic mechani…
Poli(metacrilato de metila) (PMMA) de massa molar controlada foi sintetizado, em solução de tolueno, utilizando peróxido de benzoíla como iniciador e 1-dodecanotiol (DDM) como agente de transferência de cadeia. O efeito da concentração de DDM sobre a massa molar do PMMA foi investigado. Copolímeros de metacrilato de m…
The crystal structure of γ- Mo 4 O 11 was obtained at room temperature (296 K) by Rietveld analysis with X-ray powder diffraction data. The crystal belongs to orthorhombic system, space group: Pna 2 1 , Z =4, Mr=559.753 (Atomic weights 1977), D x =4.1228 g / cm 3 , F (000)=1024.0, μ=451.293 cm −1 (Int. Tab. Vol. C, Ta…
Abstract Choosing an environmental control technology for destroying oxides of nitrogen (NO x ) became essential when Engelhard, a manufacturer of automotive catalysts, included inorganic nitrate compounds in their formulations. Heat treating catalysts inside a high temperature oven causes these compounds to decompose…
In this paper we studied the piezoelectric and dielectric properties of collagen films, considering the development of new biomaterials which have potential applications in coating of cardiovascular prostheses, support of cellular growth and in systems for controlled drug delivery. The resonance technique was used to…
Numerous studies of grafted skin suggest that full-thickness skin grafts are nourished by exudate from the recipient bed called a serum imbibition. However, whether serum imbibition by itself is sufficient for nourishment of skin grafts has not been shown definitely and directly. To clarify the role of serum imbibitio…
The effect of Al 2 O 3 substitution on the thermal expansion behavior of a Li 2 O‐ZnO‐SiO 2 glass‐ceramic was investigated using differential thermal analysis, X‐ray diffractometry, and dilatometry. The coefficient of thermal expansion of the original Al 2 O 3 ‐free glass‐ceramic measured between 20° and 900°C decreas…
Abstract The structural properties of end members of the aluminosilicate garnet family (pyrope, grossular, almandine and spessartine) have been investigated as a function of applied pressure. The study has been performed with the density functional theory code CASTEP which uses pseudopotentials and plane-wave basis se…
Ceramics of several PbB1/2 3+ B1/2 5+O3 perovskites (B3+-In, Sc, Yb, Lu, Er, Tm; B5+-Nb, Ta) with differing degree of compositional ordering were obtained using Li2CO3 additions. Ordering process in Li-doped ceramics is greatly enhanced due to recrystallization of grains in the presence of liquid phase. The properties…