Materials Literature
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We measured the third-harmonic spectrum for each of four squaraine dyes in chloroform. By fitting the experimental dispersion of the third-order susceptibility, γ, to a four-level sum-over-states model, we determine the strength and the location of the lowest-lying two-photon-like transition. In each case, we find tha…
We present here the experimental and theoretical analysis of the x-ray near-edge absorption spectra of LaNi${\mathrm{O}}_{3}$, NdNi${\mathrm{O}}_{3}$, ${\mathrm{Nd}}_{1\ensuremath{-}x}{\mathrm{La}}_{x}\mathrm{Ni}{\mathrm{O}}_{3}$, and $\mathrm{Nd}{\mathrm{Ni}}_{1\ensuremath{-}x}{\mathrm{Fe}}_{x}{\mathrm{O}}_{3}$ solid…
Aluminum K‐edge XANES spectra of high pressure and high temperature (4.4 GPa and 1575°C) glasses along the NaAlSi 2 O 6 (Jd)‐NaAlSi 3 O 8 (Ab) join are reported using synchrotron radiation, and shown to provide direct experimental evidence for the pressure‐induced coordination change of Al. Five‐ and six‐fold coordina…
To obtain an optimum shape memory component, functional and structural properties have to be connected during fabrication. To fulfil these requirements thermomechanical treatments are used to generate favourable microstructures by "combined reactions". Combined reactions can be composed of recrystallization, precipita…
The microstructure and nonohmic characteristics of polycrystalline ZnO-V 2 O 5 ceramics with V 2 O 5 as the only additive ranging from 0 to 2 mol% were investigated. An abnormal grain growth was observed for ZnO doped with V 2 O 5 and sintered at 900° C. However, the non-uniformity of the grain structure alleviated wi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural Study of Poly(phenylsilsesquioxane) Sol-Gel MaterialsM. Smaihi, T. Jermoumi, and J. MarignanCite this: Chem. Mater. 1995, 7, 12, 2293–2299Publication Date (Print):December 1, 1995Publication History Published online1 May 2002Published inissue 1 December 1995https:…
Abstract Samples from deep wells of the Palaeozoic Illinois Basin show the evolution of the illite-smectite (I-S) mineral transformation under low temperatures for very long periods of time. Curve decomposition of the XRD traces was used to identify and follow the evolution of the different clay minerals. All samples…
Five new chiral liquid crystal systems induced by intermolecular hydrogen bonding between 4-[(s)-2-chloro-3-methyl]butyroyloxy-4′-stilbazole (MBSB, proton acceptor) and 4-alkoxybenzoic acids (nBA, proton donors) were prepared. Their liquid crystalline properties were investigated by DSC and polarized optical microscop…
The effect of substrate rotation on transport of reactive gases and epitaxial growth rate is investigated for a horizontal single‐wafer reactor using a model and experiments. The governing equations for gas velocity, temperature, and chemical species transport are solved for the system for Si thin‐film preparation. Th…
Abstract. We present models of the microstructure of martensite that occurs when twinned layers of martensite meet a pure variant. This microstructure often occurs below the A, temperature, with loading that favors the passage from one pure variant of martensite to another. This microstructure gives a mechanism for va…
The behavior of fiber-reinforced composites is governed by the crack-bridging force provided by the fibers, which can be obtained by the analysis of debonding and bending of fibers across a crack. In this paper, a micromechanical model for the analysis of crack-bridging force is developed. As fiber debonding has been…
Thrombosis remains a significant and potentially catastrophic complication of polyethylene terephthalate (Dacron) prosthetic vascular graft implantation. Numerous attempts have been made to create a novel surface that reduces the adverse effects of blood interaction with the material. The purpose of this study was to…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStretching-Induced Correlations in Triblock Copolymer Gels As Observed by Small-Angle Neutron ScatteringK. Reynders, N. Mischenko, K. Mortensen, N. Overbergh, and H. ReynaersCite this: Macromolecules 1995, 28, 25, 8699–8701Publication Date (Print):December 1, 1995Publication…
A rigorous theory is developed for the ordering interaction J(R ij) in a crystal having a structural phase transition when J(R ij) is mediated by elastic relaxation in the material. The ordering process in cell i sets up a local stress field due to the sizes, shapes or displacements of atoms or atomic groups, which pr…
Abstract— We have developed a novel scheme to drive bistable reflective cholesteric displays, in which the optical state of a pixel is determined by a pulse shorter than 1.0 ms. This scheme takes advantage of the rapid transition of the cholesteric liquid crystal from the homeotropic state to the transient planar stat…
During the past few years, a new theory of martensite has been developed in which microstructure is predicted by energy minimization ([1, 2]). The theory is based on a crystallographic model, and the continuum theory is obtained from this model by using the Cauchy-Born rule to relate atomic to macroscopic deformation.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCocrystallization and Phase Segregation of Polyethylene Blends between the D and H Species. 8. Small-Angle Neutron Scattering Study of the Molten State and the Structural Relationship of Chains between the Melt and the Crystalline StateKohji Tashiro, Kouji Imanishi, Masaaki…
In X-ray storage phosphors an image is formed and stored by generation of room temperature stable radiation-induced electron and hole trap centres. The image is read-out by recording a photo-stimulated luminescence (PSL) from a doped activator, generally stimulating the electron trap centres. The best-known and hither…
Based on the ideas of Landau-de Gennes theory applied to nematic liquid crystals, several forms for the variation of the order parameter as a function of temperature are investigated over a wide nematic range. These functional forms are used to fit the experimental order parameters, determined through the use of C-13…
Abstract The paper consides the effects of compatibilization with maleic anhydride grafted polypropylene (PP‐g‐MAH) on the propertie of immiscible blends of polypropylene (PP) and nylon 6 (N6). We prepared the blends by three different mixing processes; single‐step blending, two‐step blending with reactive premixing,…