Materials Literature
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Lyocell fibers, regenerated cellulosic fibers spun from cellulose/ N -methylmorpholine- N -oxide hydrate solution by wet spinning, were treated with LiOH aqueous solution at concentrations of up to 7.5 M to study the inter- and intrafibrillar changes. Wide-angle X-ray diffraction analyses were applied to identify the…
Multiwalled carbon nanotube–supported Rh nanoparticles prepared by a simple sonochemical method are highly active for catalytic hydrogenation of dibenzo-18-crown-6 to dicyclohexyl-18-crown-6. The catalytic hydrogenation reaction shows a selectivity favoring the cis-syn-cis isomer over cis-anti-cis isomer of the produc…
The introduction of an un-doped silicon layer (spacer) enhances significantly the thermoelectric power factor in modulation-doped Si(Al)-MnSi 1.7 -Si(Al) sandwich structure. This un-doped silicon layer is inserted between the MnSi 1.7 (HMS) and Al -doped silicon layers. With a proper spacer thickness, the electrical r…
Abstract Processing of polymers depends on corrosion‐ and wear resistant tool materials being in direct contact with the feedstock material. Plastic mold steels, a special group of tool steels, are successfully applied here, offering both a good wear and corrosion resistance. The lifetime of tools used for plastic pro…
Abstract Starch/Polyvinyl alcohol (PVA) based biocomposite films reinforced with micro crystalline cellulose (MCC) (10 wt %) particles were prepared by solution casting method, incorporating glycerol as plasticizer. These biocomposite films were subjected to biodegradation at ambient temperature in a simulated aerobic…
A robust diffusion barrier and metallization liner technology are critical for the realization of a functional and reliable interconnect structure. While copper barrier materials and processes have evolved significantly since the onset of copper-based metallization, the extendibility of existing barrier/liner solution…
Die große Zahl ungesättigter Fe-Oberflächenzentren macht mesoporöses Zwei-Banden-Ferrihydrit zu einem effektiven Fänger von O3, das an drei- (Ladungstransfer von Blau zu Orange links im Bild) wie auch vierfach koordinierte Zentren adsorbieren kann (rechts). Von Vorteil für die gute Wechselwirkung mit O3 ist offenbar d…
Single crystals of tribarium diyttrium hexaborate, which crystallized in the cubic system, have been obtained by spontaneous crystallization from a high-temperature melt using Li(2)O-BaO-B(2)O(3) as flux. Its structure is composed of isolated [B(2)O(5)](4-) groups, irregular BaO(9) polyhedra and regular YO(6) polyhedr…
Synthesis of ZnO nanostructures of different shape and size is of fundamental important for nanoscale device fabrication. Here, we report a new class of three-dimensional highly uniform ZnO hexagonal submicrometer rods. This unique morphology has achieved by suitably selecting a metal grid as the substrate in a vapor–…
Two different kinds of uniplanar–axial orientations, exhibiting the polymer chain axis parallel to the main draw direction ( c ax )and the ac plane parallel or perpendicular with respect to the film plane ( a ∥ c ax and a ⊥ c ax, respectively) have been achieved for several cocrystalline s-PS phases. The preparation p…
Abstract A novel linear low‐density polyethylene (LLDPE)/polypropylene (PP) thermostimulative shape memory blends were prepared by melt blending with moderate crosslinked LLDPE/PP blend (LLDPE–PP) as compatibilizer. In this shape memory polymer (SMP) blends, dispersed PP acted as fixed phase whereas continuous LLDPE p…
We have presented a comprehensive investigation for the geometric, energetic, and electronic structures of the rutile TiO 2 nanowire (NW) and nanotube (NT) by the first-principles calculations accompanied with the crystal orbital overlap population and the wave function analysis. Taking into account the surface intera…
Single walled carbon nanotubes (SWNTs) seeds are grown using Fe-Co nanoparticles on spin-on-glass. The relative efficiency of nucleation and amplification (versus etching) was investigated as a function of the CH(4)/H(2) feedstock ratio and growth temperature. At 900 °C, maximum amplification is obtained with CH(4)/H(…
SUMMARY Exfoliated graphite nanoplatelets (xGnPs) were used to improve the flame resistant performance of glass fiber‐reinforced polyester composites. Along with xGnP, traditional intumescent fire retardant ammonium polyphosphate (APP) was introduced into the polymer matrix as the dominant additive to reduce the heat…
A manganese oxidizing bacterium was isolated from the surface of steel scraps and biochemical tests and 16S rRNA sequencing analysis confirmed the isolate as Bacillus flexus. Potentiodynamic polarization curves showed ennoblement of open circuit potential, increased passive current, a lowering of breakdown potential,…
We report on the interesting interfacial behavior of oligoethylene glycol or OEGylated linear dendron monolayers at the air-water interface as a function of (a) carbazole dendron generation, (b) the length of the OEG units, and (c) the surface pressure applied upon compression. Surface pressure-area isotherms, hystere…
Abstract The ring‐opening polymerizations (ROPs) of ε‐caprolactone (ε‐CL) and δ‐valerolactone (δ‐VL) with pentafluorophenylbis(triflyl)methane (C 6 F 5 CHTf 2 ) as the organocatalyst and alcohol initiators were carried out. For the ROP using 3‐phenyl‐1‐propanol (PPA) as the initiator in CH 2 Cl 2 at room temperature w…
In this paper, we propose a compact seven-port beam splitter which is constructed using only a single-layer high-density grating with a dual duty cycle structure. The properties of this grating are investigated by a simplified modal method. The diffraction efficiency can be achieved around 10% more than conventional D…
The performance of high alumina castables containing mullite and spinel coated graphites was investigated to explore their commercial application in carbon containing refractory composites. It was compared in terms of thermal shock resistance, refractoriness under load, static slag resistance test, pore size distribut…
BACKGROUND: With the progress in medicine, the average human life expectancy is continuously increasing. At the same time, the number of patients who require full organ transplantations is augmenting. Consequently, new strategies for cell transplantation are the subject of great interest. METHODOLOGY/PRINCIPAL FINDING…