Materials Literature
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Thin layers of niobium oxide ( NbO x ) were accumulated by the sol‐gel process, with the sol of NbO x in ethanol prepared by partial hydrolysis of commercial niobium(V) ethoxide, on glass plates coated with transparent conducting tin oxide. Characterization by x‐ray diffraction, differential thermal analysis, and ther…
The phase sequence of a new family of chiral smectic liquid crystals, represented by 4-(1-methylhepthyloxycarbonyl) 3-fluorophenyl 4 ′ -dodecylbiphenyl-4-carboxylate (MHFPDBC), were investigated by measurements of dielectric dispersion under various bias field strengths. Three phases, ferrielectric smectic C γ * phase…
The pseudoelastic behaviour associated with the martensitic transformation (MT) of TiNi shape memory alloys subjected to strain variations has been investigated experimentally. The results are summarized as follows. Firstly, with respect to strain variations within the MT region: (1) The reverse transformation stress…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSimple Density Functional Approach to Polarizability, Hardness, and Covalent Radius of Atomic SystemsTapan K. Ghanty and Swapan K. GhoshCite this: J. Phys. Chem. 1994, 98, 37, 9197–9201Publication Date (Print):September 1, 1994Publication History Published online1 May 2002Pu…
Forty-two different carbon sources were tested for the polyester synthesis of a citronellol-utilizing bacterium, Pseudomonas citronellolis (ATCC 13674). These included linear C(2) to C(10) monocarboxylic acids, C(3) to C(10) dicarboxylic acids, saccharides, alpha,omega-diols, hydrocarbons, and 3-methyl-branched substr…
The refractive index of binary tellurite glasses with various modifiers was measured down to the fifth decimal place in the wavelength range of 0.40–1.71 μm using the minimumedeviation method. An empirical equation based on the single‐oscillator Drude–Voigt dispersion equation. n d 2 = A·Nf λ 0 2 + B , is obtained, wh…
BaTiO 3 films of various thicknesses were grown on doped and undoped SrTiO 3 (100) substrates and on (La, Sr) 2 CuO 4 films by a pulse laser deposition method. Both BaTiO 3 and (La, Sr) 2 CuO 4 films were smooth and free of particulates. X-ray diffractometry showed that all materials were three-dimensionally aligned w…
Several of the chromophore molecules considered for use in nonlinear optical polymers exhibit photoisomerization. This photoinduced transformation from one isomer to another changes the shape of the dipolar molecule and thus often enhances its mobility within a polymer matrix. Consequently, the molecular dipoles can s…
The crystal structure of the Al3Pd phase, considered to be a closely related structure to decagonal quasicrystals with a period of about 1.6nm, has been determined by a combination of single-crystal X-ray analysis and high-resolution electron microscopy. The atomic model, which has about 280 atoms in an orthorhombic u…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReduction and Aggregation of Silver Ions at the Surface of Colloidal SilicaDarren Lawless, Sudhir Kapoor, Pierre Kennepohl, Dan Meisel, and Nick SerponeCite this: J. Phys. Chem. 1994, 98, 38, 9619–9625Publication Date (Print):September 1, 1994Publication History Published on…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolyiron Oxo Chemistry at the Molecular/Solid-State Boundary: Synthesis, Structure, and Magnetic and Moessbauer Properties of [Fe16MO10(OH)10(O2CPh)20] Complexes, M = Mn, Fe, or CoWolfgang Micklitz, Vickie McKee, R. Lynn Rardin, Laura E. Pence, Georgia C. Papaefthymiou, Simo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLiquid Crystal Transition and Crystallization Kinetics in Poly(ester imide)sRicardo Pardey, Scott S. Wu, Jianhua Chen, Frank W. Harris, Stephen Z. D. Cheng, Andrew Keller, Jerry Aducci, John V. Facinelli, and Robert W. LenzCite this: Macromolecules 1994, 27, 20, 5794–5802Pub…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSonochemical Destruction of CFC 11 and CFC 113 in Dilute Aqueous SolutionH. Michael. Cheung and Shreekumar. KurupCite this: Environ. Sci. Technol. 1994, 28, 9, 1619–1622Publication Date (Print):September 1, 1994Publication History Published online1 May 2002Published inissue…
The anisotropic thermal diffusivity α of the highly c -axis-oriented Y–Ba–Cu–O bulk superconducting crystals has been measured quasi-simultaneously with the thermal conductivity κ. The estimated values of the specific heat C by use of α and κ values parallel and perpendicular to the c -direction agreed with each other…
Amorphous fluoropolymers (AF) have recently been developed to provide several favorable characteristics not present in the more crystalline materials. However, these polymers have not been fully characterized and reports of surface modification are not extensive. This work presents results of surface analysis and modi…
Thin and Sb‐doped films have been prepared from aqueous colloidal solutions containing and precursors by the dip‐coating technique. The films are characterized as small grains (40 to 70 Å) and exhibit the ability to uptake reversibly Li + and H + ions from solutions of (0.1 M ) in acetonitrile (AN) or water, (0.1 M )…
In the present study the mechanisms and effectiveness of various pretreatments for fluoropolymers were studied. The pretreatments were “Tetra-Etch,” various plasmas, flame and potassium hydroxide. “Tetra-Etch” was found to be much more reactive than potassium hydroxide (KOH) towards fluoropolymers. The plasma treatmen…
Abstract The yielding behavior of isotactic polypropylene (iPP) sheets prepared by hot pressing was studied by tensile testing. The corresponding microstructural changes in the specimens after testing were investigated by image analysis, optical microscopy (OM), scanning electron microscopy (SEM), and differential sca…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotochemistry of Squaraine Dyes. 8. Photophysical Properties of Crown Ether Squaraine Fluoroionophores and Their Metal Ion ComplexesSuresh Das, K. George Thomas, K. J. Thomas, Prashant V. Kamat, and M. V. GeorgeCite this: J. Phys. Chem. 1994, 98, 37, 9291–9296Publication Da…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNon-First-Order Kinetics of the High Spin-Low Spin Relaxation in [Fe(bpp)2](BF4)2 after LIESST and Thermal Spin TrappingT. Buchen, P. Guetlich, and H. A. GoodwinCite this: Inorg. Chem. 1994, 33, 20, 4573–4576Publication Date (Print):September 1, 1994Publication History Publi…