Materials Literature
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In this paper an oxygen sensor based on Ga 2 O 3 films was analyzed. We propose a sensor using a Pt–Ga 2 O 3 –Pt structure with a bottom Pt layer electrode and a mesh type Pt electrode atop the Ga 2 O 3 film. Ga 2 O 3 films were prepared by rf magnetron sputtering from a powder target using Ar as the sputtering gas. A…
High birefringence and low viscosity nematic liquid crystal single compounds and mixtures were developed and their properties evaluated. The UV stability of the single isothiocyanianes liquid crystal compounds was studied by different methods. Excellent UV durability of some of the single high birefringence isothiocya…
Polymer surface layers comprised of mixed chains grafted to a functionalized silicon surface with a total layer thickness of only 1-3 nm are shown to exhibit reversible switching of their structure. Carboxylic acid-terminated polystyrene (PS) and poly (butyl acrylate) (PBA) were chemically attached to a silicon surfac…
Influence of Growth Mode of Carbon Nanotubes on Physical Properties for Multiwalled Carbon Nanotube Films Grown by Catalystic Chemical Vapor Deposition, Horibe, Masahiro, Nihei, Mizuhisa, Kondo, Daiyu, Kawabata, Akio, Awano, Yuji
The deposition of diamond-like carbon (DLC) films at subatmospheric pressure has been achieved by the nanopulse plasma chemical vapor deposition (CVD) method. To realize this process, a high ion density and non-arcing plasma at subatmospheric pressure are required. A static induction (SI) thyristor with an inductive e…
Ferromagnetic Zn 1- x Cu x O (ZnO:Cu) films were epitaxially grown on n-GaN(0001)/Al 2 O 3 (0001) by radio-frequency magnetron sputtering at a substrate temperature as low as 700°C. X-ray diffraction θ-2θ scans, φ-scans, and surface morphology studies revealed the degree of crystallinity, epitaxiality, and grain size.…
A reflective-type polymer-stabilized cholesteric liquid crystal (PSCLC) cell was demonstrated at λ=1550 nm laser wavelength. It showed a high attenuation range (∼30 dB), a low operating voltage (∼12 V rms ), a highly efficient polarization-independent behavior and flat wavelength dependence in the range of 1525–1575 n…
Abstract The nonisothermal cold‐crystallization kinetics and subsequent melting behavior of poly(trimethylene terephthalate) (PTT) were investigated with differential scanning calorimetry. The Avrami, Tobin, and Ozawa equations were applied to describe the kinetics of the crystallization process. Both the Avrami and T…
The structural determinants of the unusually low pK(a) values of Cys282 in human creatine kinase and Cys232 in alpha1-antitrypsin were studied computationally. We have demonstrated that hydrogen bonding to the cysteine residue is the prime determinant for both proteins. In the case of creatine kinase, the hydrogen bon…
Highly textured Ca-doped (ZnO) m In 2 O 3 ( m is an integer) ceramics were fabricated by the reactive templated grain growth (RTGG) method and their thermoelectric properties were examined. Platelike ZnSO 4 ·3Zn(OH) 2 particles were used as reactive templates and mixed with In 2 O 3 and CaCO 3 powders into a stack of…
Mesoporous semimetal bismuth film and magnetic metal nickel and cobalt thin films have been electrodeposited from hexagonal or lamellar structured lyotropic liquid crystalline phases with polyoxyethylene surfactant. The liquid crystalline templates are characterized by low-angle X-ray diffraction (XRD) and polarized-l…
Strain-induced band gap shifts that depend strongly on the chiral angle have been observed by optical spectroscopy in single-walled carbon nanotubes (SWCNTs). Uniaxial and torsional strains are generated by changing the environment surrounding the SWCNTs, using the surrounding D2O ice temperature or the hydration stat…
Abstract Plasticized polysaccharide coatings on polypropylene (PP) film were prepared to evaluate the optical and tensile properties of the resulting coated films, as affected by biopolymer and plasticizer types, in order to develop a novel film structure of biopolymer coatings on common plastics intended for food pac…
The morphology and growth behavior of naphthalene, anthracene, and tetracene is studied both experimentally and by computer simulations. We will show that the attachment energy morphology prediction for all compounds gives approximately the correct habit, but that this is merely coincidental. Our Monte Carlo simulatio…
In this research, the discrimination of tungsten and different oxidization states of its oxide has been studied using an electron probe microanalyzer (EPMA), and the results have been compared with those obtained by X-ray photoelectron spectroscopy (XPS). As a result, the relationship between the oxidization state of…
An ordered (2D-hexagonal) mesoporous Mg and Ta mixed oxide (Mg−Ta oxide) is successfully prepared. The mesoporous Mg−Ta oxide is stable after calcination at 773 K for 30 h, and has a BET surface area of 123 m 2 g - 1, pore size of 5.0 nm, and wall thickness of 2.8 nm. Removal of the template by washing in water result…
The electronic structure and the magnetic properties of (Zn,Cr)S, (Zn,Cr)Se and (Zn,Cr)Te are calculated by using the Korringa-Kohn-Rostoker method combined with the coherent potential approximation (KKR-CPA) within the local density approximation. Curie temperatures are calculated by the mean field approximation (MFA…
During attempts to fabricate ZnO nanowires, we accidentally observed the growth of SiO x nanowires on Au-coated Si substrate. Detailed characterizations on the resulting nanowires were carried out by field-emission scanning electron microscopy, electron microprobe analysis, transmission electron microscopy, selective…
Most currently evaluated macromolecular contrast agents for magnetic resonance imaging (MRI) are not biodegradable. The goal of this study is to synthesize and characterize poly(l-glutamic acid) (PG) gadolinium chelates as biodegradable blood-pool MRI contrast agents. Two PG chelates of gadolinium diethylenetriaminepe…
Isotactic polypropylene (iPP) gives very extensive degradation when treated with peroxides above its melting temperature in mechanical mixers or extruders. This undesired reaction is very modestly affected by maleate molecules which on the contrary actively compete with side reactions of macroradicals in the case of e…