Materials Literature
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Abstract The viability of vinyltrimethoxy silane was investigated as a coupling agent for the manufacture of wood–plastic composites (WPC). The effect of silane pretreatment of the wood flour on the thermal and the dynamic mechanical properties and thermal degradation properties of the composites were studied. Moreove…
Abstract Pre‐formed polyvinylpyrrolidone‐stabilized gold‐palladium clusters, consisting of 80 mol% gold and with a mean size of 1.9 nm, were immobilized quantitatively in a porous polyimide membrane via the process of phase inversion, without loss of metal nanodispersion. The obtained gold‐palladium/polyimide membrane…
We present ab initio investigations of the electronic structure and zone-center phonon modes in bulk BiFeO3 with rhombohedral R3c symmetry. The electronic structure has been studied using the plane wave pseudopotential method, with electron-electron interaction treated within the local spin density approximation (LSDA…
1–3 connectivity lead zirconic titanate (PZT)∕epoxy composite thick films containing fine-scale and high aspect ratio PZT pillars (40μm sectional width, 40μm spacing, and 5.5 aspect ratio) were obtained by a modified dice and fill method. The composite thick film works at a high frequency >7MHz with a clear and uncoup…
Oxide semiconductor alloys of x(LiGaO2)1∕2–(1−x)ZnO were synthesized by a standard solid state reaction. The wurtzite-type single phases were obtained in the wide composition range of x⩽0.38 because the β-LiGaO2 possesses a wurtzite-derived structure and approximately the same lattice constants with ZnO. The resulting…
R6G/coumarin/phyllosilicate hybrids were prepared by incorporation of rhodamine 6G (R6G) molecules into the interlayer space of a coumarin/Mg−phyllosilicate hybrid (a host hybrid). Deintercalation of the coumarin moiety and segregation of two different functional organic dyes are eluded using the host hybrid, in which…
Cellulose based electroactive paper has been developed as smart material. In this paper, corona poled cellulose films were prepared to improve their piezoelectricity and the influence of grid voltage to the corona poling was investigated. Cellulose was regenerated by dissolving cellulose natural fibers using a solvent…
Sequential interpenetrating polymer networks (IPNs) were prepared using polyurethane (PUR) synthesized from canola oil-based polyol with terminal primary functional groups and poly(methyl methacrylate) (PMMA). The properties of the material were evaluated by dynamic mechanical analysis (DMA), differential scanning cal…
We report the effects of thermally annealing, non-, just-, and thick continuous silver films for their potential applications in metal-enhanced fluorescence, a near-field concept which can alter the free-space absorption and emissive properties of close-proximity fluorophores (excited states). We have chosen to anneal…
In this paper, the piezoelectric properties of laminated films made of polytetrafluoroethylene (PTFE) and tetrafluoroethylene-hexafluoropropylene (FEP) copolymer by an improved process and charged by a corona method are investigated by measurements of the pressure dependence of the piezoelectric d33 coefficents, the i…
Core-in-shell particles with controllable core size have been fabricated from core-shell particles by means of the controlled core-dissolution method. These cores in inorganic shells were employed as scaffolds for the synthesis of metal nanoparticles. After dissolution of the cores, metal nanoparticles embedded in cor…
Modulated differential scanning calorimetry measurements on bulk (Na(2)O)(x)(GeO(2))(1-x) glasses show a sharp reversibility window in the 14%<x<19% soda range, which correlates well with a broad global minimum in molar volumes. Raman and IR reflectance transverse- and longitudinal-optic mode frequencies exhibit anoma…
We have applied the Callaway theory and used a detailed account of three-phonon scattering processes to calculate the thermal conductivity of three AlN single crystal samples containing different amounts of oxygen and two AlN ceramic samples with different grain sizes and oxygen contamination levels. The N-drift contr…
Abstract A variational formulation and C1 finite element scheme with adaptive mesh refinement and coarsening are developed for phase‐separation processes described by the Cahn–Hilliard diffuse interface model of transport in a mixture or alloy. The adaptive scheme is guided by a Laplacian jump indicator based on the c…
Abstract This research focused on the manufacture a polarizing film with PVA iodinated at solution before casting (IBC) film, which was prepared by casting aqueous solutions of 10 wt % poly(vinyl alcohol) (PVA) containing boric acid with 0, 0.1, 0.5, and 1.0 mol/L of I2/KI aqueous solution, and I2/KI(1:2) with 0, 5, a…
Abstract N‐alkylated chitosan derivatives were synthesized in water containing acetic acid by the Michael addition reaction of chitosan with various acryl reagents. The chemical structures of the chitosan derivatives were characterized with Fourier transform infrared and 1H‐NMR techniques. The 1H‐NMR results indicated…
The structural and mechanical properties of the cubic spinel CSi2N4 (c-CSi2N4) are studied by first-principles total energy calculations based on the density-functional theory. It is found that the calculated lattice constants and bulk modulus are in good agreement with previous calculations. The elastic constants sho…
Seven perovskite samples in the LaxSr1−3x∕2TiO3 solid solution series were monitored in situ during irradiation with 1.0MeV Kr2+ ions using the intermediate voltage electron microscope-Tandem User Facility (IVEM) at Argonne National Laboratory. All the perovskites pass through the crystalline-amorphous transformation.…
Nanostructured porous silicon (PS) optical filters have been proposed for their use in biological and chemical sensing applications. PS, however, presents a reactive surface that must be adequately passivated in order to achieve the required chemical stability mandatory for sensing applications. In the present work, t…
Abstract Polypropylene (PP)/layered‐silicate organoclay nanocomposites and their fibers were prepared by melt compounding and melt spinning, respectively, in the presence or absence of compatibilizer (PP‐based maleic anhydride compatibilizer) to examine the effects of the organoclay dispersion and rheological behavior…