Materials Literature
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Abstract Several novel side‐chain liquid crystalline (LC) polysiloxanes bearing cholesteryl cinnamate mesogens and trifluoromethyl‐substituted mesogens were synthesized by a one‐step hydrosilylation reaction with poly(methylhydrogeno)siloxane, a cholesteric LC monomer cholesteryl 3‐(4‐allyloxy‐phenyl)‐acryloate and a…
We propose a scheme for an experimental verification of the reversed Cherenkov effect in left-handed media. The scheme uses optical-to-terahertz conversion in a planar sandwichlike structure that consists of a nonlinear core cladded with a material that exhibits left-handedness at terahertz frequencies. The focused in…
Epitaxial Ta films were grown on c-cut and r-cut sapphire substrates using magnetron sputtering. X-ray diffraction measurements indicate that the Ta films grown on c-cut sapphire substrates have two different crystal orientations. Low vacuum base pressure produced films with the (111) plane parallel to the basal plane…
After prolonged heating in acetonitrile, a highly asymmetric, trinuclear manganous complex self-assembles from MnCl(2) and bis(2-pyridylmethyl)-1,2-ethanediamine (bispicen). The central Mn(II) ion is bridged to the terminal metal ions in the molecule by single chloride anions. The organic ligands each bind to a single…
The solubility of sucralose in water, methanol, ethanol, and isopropyl alcohol from (283.15 to 333.15) K was measured by an isothermal method. The results show that the solubility of sucralose in the four solvents increases with the increasing temperature. The experimental solubility data were correlated by the modifi…
The quenched emission intensity for *Ru(bpy) 3 2+ in the presence of ferrocyanide, [Fe(CN) 6 4− ], was restored in aqueous solutions at pH 8 via the addition of PAMAM dendrimers due to competitive electrostatic binding of the ferrocyanide to the dendrimer. Binding equations were developed assuming a 1:1 interaction be…
Abstract Reaction between low molecular weight highly functionalized maleic anhydride grafted polyethylene and several diamines were carried out using xylene as a reaction media. The influence of varying the amine to maleic anhydride (NH 2 /MAH) molar ratio and chain length of diamine on reaction was investigated. It…
Light-regulatable compounds are finding increasing utility as spatial and temporal probes of biological behavior. An independent measure of successful light-induced structural change is possible when alteration (e.g., activation, deactivation, etc.) of the bioprobe can be directly linked to a fluorescent readout. We h…
For discrete actuation with shape memory alloy (SMA) wires, the actuation moment can be controlled by changing the amount of wire offset. Increasing offset not only enhances the actuating moment, but also demands larger displacement capability of the actuator. In this paper, large deflection of a cantilever beam actua…
Resonant leaky modes can be induced on dielectric, semiconductor, and metallic periodic layers patterned in one or two dimensions. Potential applications include bandpass and bandstop filters, laser mirrors, ultrasensitive biosensors, absorption enhancement in solar cells, security devices, tunable filters, nanoelectr…
Optical, electrical and structural properties of argon (Ar) ion-irradiated buckypapers of multi-walled carbon nanotube (MWCNT) at various doses prepared by a vacuum filtration method were investigated. It was found that the direct current (DC) conductivity and absorption spectra in the visible range were decreased wit…
Efficient emission at 1.38 mum wavelength from holmium (Ho(3+))-doped low-phonon-energy gallate bismuth lead (GBL) oxide glasses, owing to the Ho(3+): ((5)S(2),(5)F(4))-->(5)I(5) transition, was observed, and the stimulated emission cross section was calculated to be 2.4x10(-21) cm(2). Population inversions between th…
Abstract The solubility and diffusivity of several gases in polystyrene (PS) and styrene acrylonitrile copolymer (SAN) were studied with the pressure decay method. Data were collected for carbon dioxide, isobutane, and 1,1,1,2‐tetrafluoroethane (R‐134a) in PS and for R‐134a in SAN. The temperature range was between 30…
Abstract To be able to give safe recommendations concerning the choice of suitable stainless steel grades for pipelines to be buried in various soil environments, a large research programme, including field exposures of test specimens buried in soil in Sweden and in France, has been performed. Resistance against exter…
Proteins form the basis of a wide range of biological materials such as hair, skin, bone, spider silk, or cells, which play an important role in providing key functions to biological systems. The focus of this article is to discuss how protein materials are capable of balancing multiple, seemingly incompatible propert…
The physicochemical properties and combustion characteristics of model soot (i.e., Printex U) and diesel particulates with different origins were compared. Their elemental composition and structures were determined using several kinds of techniques including element analysis, infrared spectroscopy (IR), X-ray fluoresc…
We report the synthesis and characterization of BaTiO 3 (BT)‐based high dielectric compositions that are promising for Y5V‐type multilayer ceramic capacitors. A solid solution with a nominal composition (1− x )BaTiO 3 – x Ba(Cu 1/3 Nb 2/3 )O 3 (BCN) ( x =0, 0.025) was synthesized by conventional mixed oxide route, fol…
A model for the pressure−temperature behavior of the coil−globule transition (CGT) of a polymer in dilute solution is developed without adjustable parameters. The predicted pressure−temperature conformational behavior semiquantitatively correlates with extant experimental data. The model yields a heating induced coil-…
Photoconduction properties of silicon rich oxide (SRO) thin films were studied under different illumination conditions. In the past, Al/SRO/Si structures showed a high photocurrent in spite of the fact that an opaque Al layer was on the active area. In order to elucidate this observation, new Al/SRO/Si structures were…
Using the discrete dipole approximation method, we demonstrated enhanced absorption efficiencies, which are close to 100%, at tunable wavelengths in a two-layer silver thin film. The film is composed of a 100 nm thick perforated layer facing the incident light and a 100 nm thick solid layer. Resonance wavelengths are…