Materials Literature
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Novel polyurethane adhesives (PUA) were prepared by the incorporation of organic montmorillonite (OMMT). The structure of the PUA/OMMT adhesives was analyzed by wide angle X-ray diffraction, Fourier transform infrared spectroscopy, and transmission electron microscopy. It was observed that the OMMT layers in the PUA w…
Results concerning streamer propagation along cylindrical insulators coated with room-temperature-vulcanised silicon rubber coatings are presented. Experiments were carried out in a three-electrode arrangement consisting of a 12 cm long parallel-plane gap with an auxiliary needle in the earthed anode. Insulators could…
The solution of the inverse problem in scatterometry, i.e. the determination of periodic surface structures from light diffraction patterns, is incomplete without knowledge of the uncertainties associated with the reconstructed surface parameters. With decreasing feature sizes of lithography masks, increasing demands…
Abstract The advantages of cyanate esters (CEs) versus competitor systems such as epoxies and polyimides, as well as the great reinforcing potential of organoclays properly dispersed into a polymeric matrix, have been examined in a series of polycyanurate (PCN)/montmorillonite (MMT) nanocomposites prepared under appro…
The temperature dependence of the density correlation function at next-neighbour distances has been investigated for the liquid metal lead. This correlation function is a sensitive parameter for changes in the local environment and its Fourier transform was measured in a coherent inelastic neutron scattering experimen…
Abstract The overcrowded bistricyclic aromatic enes (BAEs) [10‐[10‐(dicyanomethylene)‐9(10H)‐anthracenylidene]‐9(10H)‐anthracenylidene]propanedinitrile (7) and [10‐[10‐oxo‐9(10H)‐anthracenylidene]‐9(10H)‐anthracenylidene)]propanedinitrile(8) were synthesized by a condensation of bianthrone (2) with malononitrile in th…
By employing a modified Otto's configuration for measuring surface plasmon resonance that has been proposed by Bliokh and his coworkers [Appl. Phys. Lett.89, 021908 (2006)APPLAB0003-695110.1063/1.2220540] we have obtained complex refractive indices of metals at several wavelengths. We demonstrate that the configuratio…
Synthetic biomaterials can be used as instructive biological milieus to guide cellular behaviour and function. To further realize this application, we synthesized a series of structurally similar hydrogels and tested their ability to modulate angiogenesis. Hydrogels were synthesized from poly(DTE-co-x% DT carbonate) c…
The free ion energy level parameters of Yb 2+ are obtained by fitting the 4f 13 5d Yb 2+ free ion energy levels. A model is proposed for scaling these parameters so that they are appropriate for Yb 2+ in crystals. Treating the scaling factor, the barycenter energy E exc of the 4f 13 5d configuration, and the crystal-f…
A nanocrystalline Si-based paste was successfully tested as the light emitting material in a field emission display test device that employed a film of carbon nanofibers as the electron source. Stable emission in the 550-850 nm range was obtained at 16 V µm(-1). This relatively low field required for intense cathodolu…
We report the realization of large-area, communications-wavelength electro-optic modulators made via simple solution-casting onto an arbitrary substrate. The devices employ colloidal quantum dots synthesized in, and processed from, the solution phase. Devices exhibit greater than 30% modulation depth at the 1.55 micro…
A novel series of organosoluble poly(ether imide)s containing nitrile groups was prepared by solution polycondensation reaction of an aromatic diamine, namely 4-[bis(4-aminophenyl)amino]benzonitrile with different aromatic bis(ether anhydride)s, such as 2,2-bis[(3,4-dicarboxyphenoxy)phenyl]propane dianhydride, 1,1,1,3…
Abstract Anionic poly(p‐phenylene‐ethynylene) (PPE) incorporated polymer hybrids were synthesized from the PPE and tetramethoxysilane together with the organic polymers such as poly(vinylpyrrolidone) via a sol–gel method. Up to 10 wt % of the anionic PPE could be dispersed homogeneously in the resulting polymer hybrid…
The circular dichroism spectra of the complexes Co(acac)3, [Co(ox)3]3-, [Co(mal)3]3-, and [Co(Thiox)3]3- with acac=acetylacetonate, ox=oxalate, mal=malonate, Thiox=dithioxalate, have been investigated computationally employing time-dependent density functional theory. A detailed comparison of the experimental and theo…
Abstract Thin films of crosslinked polymethylhydrosiloxane (PMHS) have been grafted on silica using the sol–gel process allowing further functionalization by effective quantitative hydrosilylation of SiH groups by olefins within the network. Postfunctionalization gives the polysiloxane network with n‐alkyl side chains…
The dielectric response of ferroelectric Sr 1- x Ca x TiO 3 (SCT) under photoexcitation has been investigated. We observed photoinduced Debye dispersion, which is similar to that observed in nominally pure SrTiO 3 . The temperature dependence of photoinduced Debye dispersion in SCT indicates that the origin of photoin…
We report a strategy to achieve a material showing equal intensity double plasmon resonance (EIDPR) based on sandwich geometry. We studied the interaction between localized plasmon resonances associated with different metal clusters (Au/Ag) on Teflon AF (TAF) in sandwich geometry. Engineering the EIDPR was done by tai…
Abstract A new electrochromic polymer, poly(2,3,5,8‐tetra(thiophen‐2‐yl)quinoxaline) (PTTQ), was synthesized electrochemically and its electrochromic properties were investigated. The polymer was characterized by Cyclic Voltammetry, Fourier Transform infrared spectroscopy, UV‐Vis‐NIR Spectroscopy, and colorimetry. Spe…
A thermal-mechanical model is presented for calculating the residual compressive strength of flammable sandwich composite materials in fire. The model can also estimate the time-to-failure of the laminate face skin to sandwich composites exposed to fire. The model involves a two-stage analysis: thermal modeling and me…
The cure kinetics of the blends of Low density polyethylene (LDPE) and Polydimethyl siloxane rubber (PDMS) (50 : 50 w/w) with different proportion of ethylene methyl acrylate (EMA) copolymer as an in situ compatibilizer, is studied by differential scanning calorimetry (DSC) and rheometry, using dicumyl peroxide (DCP)…