Materials Literature
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Novel liquid crystal terphenyls with two, three and four lateral fluoro substituents and an alkene unit at the end of a terminal chain are presented in terms of synthesis, mesomorphic behaviour and electro-optic properties. The difluoro analogues were found to exhibit the smectic C phase over a wide temperature range,…
Solution-vapor annealing of drop-cast thin films of meso-5,10,15,20-tetra-n-decylporphyrin H(2)T(C(10)H(21))(4)P deposited on SiO(2) substrate and quartz leads to the formation of well-defined self-assemblies. Their self-assembling properties in n-hexane vapor and chloroform vapor were comparatively investigated by sc…
The tribological operating environment for cutting tools, automotive components and biomedical implant bearing surfaces is highly challenging. An assessment of the limitations of state of the art of coated materials for use in these applications has been made. Special consideration is given to the prospects for diamon…
Abstract The electrical transport and NH 3 sensing properties of randomly oriented and aligned SWNT networks were presented and discussed. The results indicate that aligned SWNT‐FETs have better FET characteristics due to the reduced number of interconnected nodes. This was particularly true as the resistance of the d…
The reactions of cadmium acetate with picolinic (Hpic), 2,6-dipicolinic (H 2 pydc), or salicylic acid (H 2 sal) followed by the addition of thiourea (tu) or thiosemicarbazide (ths) yielded six new coordination complexes, including [Cd(Hsal) 2 (tu) 2 ] ( 1a ), [Cd(pic) 2 (tu) 2 ]·0.5H 2 O ( 2a ), [Cd(pic) 2 (ths) 2 ]·2…
Multiple literature reports describe the synthesis of [RSiO(OH)] 4 or [RSiO(ONa)] 4 compounds. Surprisingly, in the majority of cases the OH or ONa groups all lie on the same face of the cyclomers or half cubes. Consequently, it appears possible to couple R containing half cubes with R’ containing half cubes to form b…
Abstract Polymer nanocomposites reinforced with multi‐walled carbon nanotubes (MWCNTs) have been newly introduced for semiconducting layers of high‐voltage electrical power cables. Homogeneity of the MWCNT‐reinforced polymer nanocomposites was achieved by solution mixing, and their mechanical, thermal and electrical p…
Composite semiconductors provide routes for realizing high-performance electronic devices, but for many applications of such devices, low-cost manufacturing techniques are desirable. We have engineered a 3 orders of magnitude enhancement of the ultraviolet photoresponse of ZnO thin films, fabricated “in situ” by drop-…
This contribution reports the first examples of stereoregular (isotactic, it -, and syndiotactic, st -) methacrylate-POSS (polyhedral oligomeric silsesquioxane) hybrid polymers and their derived nanostructured assemblies. The polymerization of methyl methacrylate (MMA) by isospecific and syndiospecific living metalloc…
Two- and four-probe electrical measurements on individual conjugated polymer nanowires with different diameters ranging from 20 to 190 nm have been performed to study their conductivity and nanocontact resistance. The two-probe results reveal that all the measured polymer nanowires with different diameters are semicon…
ABSTRACT In this study, bacterial cellulose (BC) which has high water‐absorption‐ability was added to dolphin‐fish (mahi‐mahi) surimi to assess the characteristics of composites gels. Twelve days of Gluconacetobacter xylinum (BCRC12335) fermentation decreased the pH of this medium from 4.0 to 3.6, with nata growth on…
We investigated the formation mechanism of a faceted crystal-melt interface by in situ observation. It was directly proved that a wavy perturbation is introduced into a planar crystal-melt interface and the perturbation results in zigzag facets. Such a facet formation process was observed when growth velocity was high…
The magnetic structures which endow TbMnO(3) with its multiferroic properties have been reassessed on the basis of a comprehensive soft x-ray resonant scattering (XRS) study. The selectivity of XRS facilitated separation of the various contributions (Mn L(2) edge, Mn 3d moments; Tb M(4) edge, Tb 4f moments), while its…
Die H2-D2-Austauschgeschwindigkeit an Goldpartikeln auf TiO2 verhält sich proportional zum Kehrwert des Quadrats des durchschnittlichen Durchmessers (siehe Bild). Folglich dissoziert Wasserstoff an der Grenzfläche zwischen Gold und TiO2, und die Aktivität für die katalytische H2-Dissoziation wird weder durch ein geänd…
Abstract We have attempted to prepare graphene samples by mechanical exfoliation of HOPG (highly oriented pyrolytic graphite) using scotch tape. Random testing of the flakes by AFM has shown in majority single layer graphene. Nevertheless, the presence of ultrathine graphite cannot be excluded in the large assembly of…
We study thermal transport in anisotropic Heisenberg spin chains using the quantum master equation. It is found that thermal rectification changes sign when the external homogeneous magnetic field is varied. This reversal also occurs when the magnetic field becomes inhomogeneous. Moreover, we can tune the reversal of…
Two-dimensional (2D)-hexagonal (plane group, p 6 mm ) mesoporous polymer resin thin films were obtained through evaporation-induced organic-organic self-assembly of a preformed oligomeric resol precursor and the triblock copolymer template pluronic P123. The polymer resin films were prepared on silicon wafers by spin-…
Abstract A novel toughened cyanate ester (CE) resin with good dielectric properties and thermal stability was developed by copolymerizing 2,2′‐bis(4‐cyanatophenyl)iso‐propylidene (BCE) with a combined modifier (HBPSiEP) made up of hyperbranched polysiloxane (HBPSi) and epoxy (EP) resin. HBPSi was synthesized through t…
Water-solublel-arginine-capped Fe3O4 nanoparticles were synthesized using a one-pot and green method. Nontoxic, renewable and inexpensive reagents including FeCl3,l-arginine, glycerol and water were chosen as raw materials. Fe3O4 nanoparticles show different dispersive states in acidic and alkaline solutions for the t…
The single crystal structure of a micrometre-scale copper hexadecafluoro-phthalocyanine (F(16)CuPc) ribbon synthesized by vaporization-condensation-recrystallization (VCR) process was resolved by using a synchrotron X-ray diffractometer.