Materials Literature
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Making heterolayered perovskite materials constitutes an approach for the creation of better dielectric and ferroelectric properties. In the experiment reported here, heterolayered PZT40/PZT60 films were grown on Pt/Ti/SiO2/Si (100) by a chemical solution deposition. The dielectric constant of the heterolayered thin f…
We have fabricated thermoelectric devices using InN and Al0.25In0.75N prepared by radio-frequency sputtering. The devices are composed of (a) Al0.25In0.75N–chromel of 20 pairs on SiO2 glass, (b) InN–chromel of 20 pairs on SiO2 glass, and (c) InN-chromel of 20 pairs on polyimide film. The maximum output power and the o…
Foam films stabilized by a sugar-based nonionic surfactant, beta-dodecyl maltoside, are investigated. The film thickness and the film contact angle (which is formed at the transition between the film and the bulk solution) are measured as a function of NaCl concentration, surfactant concentration, and temperature. The…
Abstract A novel diperoxoheptatungstate was crystallised as a Cs + −CN 3 H 6 + −(C 2 H 5 ) 2 NH 2 + salt and characterised by a single‐crystal X‐ray diffraction method. The anion has a Lindqvist heptametallate structure. The metal atoms are located in a bent 2‐3‐2 arrangement with the central W 3 section (W3, W4 and W…
Abstract By correlating the curvature of carbon nanotubes to the orientation of fibers in a polymer, the effect of the curvature of nanotubes on the tensile modulus of carbon‐nanotube‐reinforced polymer composites was investigated with a numerical simulation method. The simulation results showed that the tensile modul…
Abstract Hexabutyl guanidinium acetate (HBG · OAc) was synthesized and successfully used as a catalyst for the ring‐opening polymerization (ROP) of lactides. The experimental results indicated that the guanidinium salt HBG · OAc showed satisfactory catalytic behavior. Polymerization in bulk (120 °C, 18 h) produced pol…
In this work, a detailed nonisothermal model for a solid-state polymerization reactor of poly(ethylene terephthalate) (PET) is developed, discussed, and analyzed. The suggested model simulates the dynamic behavior of a continuous moving-bed reactor for the PET solid-state polymerization (SSP) process. The system of pa…
We report the observation of hundreds of oscillations in oblique-incidence optical reflectivity difference from a growth surface of Nb-doped ${\text{SrTiO}}_{3}(100)$ during a continuous, pulsed-laser deposition. Similar to in-phase specular reflection of thermal helium atoms or electrons, the optical oscillations ori…
The crystal structure of a potato calmodulin (PCM6) was solved by molecular replacement and refined to a crystallographic R factor of 22.8% (R(free) = 25.0%) using X-ray diffraction data in the resolution range 8.0-2.0 A. This is the first report of the three-dimensional structure of a plant Ca(2+)-calmodulin. PCM6 cr…
This study was aimed at understanding the nature of conformational transition(s) that occur in poly(ethylene glycol) chains with molecular weight 5000 (PEG5000) grafted onto phospholipid monolayers. The study was performed with monolayers of PEG−phospholipid, DSPE−PEG5000, at the air/water interface and on solid subst…
Application of combining herbal medicine and biomedical material science to nerve regeneration is a new approach. In this study, we describe a novel use of purified genipin, which can be extracted from Gardenia jasminoides Ellis, fixing the gelatin to be an extracellular matrix for peripheral nerve regeneration. A 10-…
[structure: see text] Novel thiophene oligomers containing a redox active hexaarylethane unit have been prepared as a new class of molecular wires having a large electrochemical bistability and definitely characterized by using single-crystal X-ray structure analysis and redox potential measurements. They constitute r…
We have investigated the Mn3d spectral function in La0.6Sr0.4FeO3(LSFO)∕La0.6Sr0.4MnO3(LSMO) heterointerfaces as well as of La1−xSrxMnO3 films using Mn2p−3d resonant photoemission spectroscopy. The strong enhancement of the Mn3d spectra at the Mn2p−3d threshold enables us to extract the Mn3d spectra of LSMO layers in…
Abstract To induce montmorillonite (MMT) to be further exfoliated and homogeneously dispersed in epoxy matrix (diglycidyl ether of bisphenol A) curing in the presence of diaminodiphenyl sulfone and obtain improved mechanical properties, a promising new method has been developed to prepare highly reinforced epoxy/MMT n…
Highly conductive nanoscale deposits with solid gold cores can be made by electron beam deposition in an environmental scanning electron microscope (ESEM), suggesting the method to be used for constructing, connecting and soldering nanostructures. This paper presents a feasibility study for such applications. We ident…
The effect of field emission cycles on printed carbon nanotubes was investigated using scanning electron microscopy and current–voltage measurement. After multiple emission cycles, the printed nanotubes irreversibly deformed to orient themselves parallel to the field direction and, from them, remarkably enhanced emiss…
Silicon nanocrystals embedded in SiO2 were isolated with a selective etching procedure, and the isolated nanocrystals’ excitonic emission energy was studied during controlled oxidation. Nanocrystals having initial diameters, d0, of ∼2.9–3.4nm showed a photoluminescence (PL) blueshift upon oxidatively induced size redu…
In the initial stage of SAD phasing, the essential point is to break the intrinsic phase ambiguity. The presence of two kinds of phase information enables the discrimination of phase doublets from SAD data prior to density modification. One is from the heavy atoms (anomalous scatterers), while the other is from the di…
Abstract Acetylation of highly stereoregular syndiotactic polystyrene has been accomplished in a heterogeneous process by using carbon disulfide as the dispersing medium, and acetyl chloride and anhydrous aluminium chloride as acetylating agent and catalyst, respectively. The acetylation reaction can be well controlle…
[reaction: see text] Bisfunctionalized dendritic multiester molecules were synthesized by combined protection-deprotection and divergent-convergent-divergent sequences in high yields leading to dendritic molecules that combine two functionally different surfaces, polar aliphatic arborol and nonpolar gallate ether moie…