Materials Literature
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We demonstrated a novel square hybrid nanosheet with a ultrathin thickness for the first time, which was fabricated by self-assembly of hyperbranched poly(ether amine) (hPEA526) containing anthracene (AN) moieties and heptaisobutyl polyhedral oligomeric silsesquioxane (POSS). TEM and AFM images reveal that the average…
Abstract Linear polyurethanes based on sugar monomers having D ‐gluco, galacto, and D ‐manno configurations and their secondary hydroxyl groups protected as bicyclic acetals, have been prepared by polyaddition reaction of these diol monomers to hexamethylene diisocyanate ( HMDI ) and 4,4′‐methylene‐bis(phenyl isocyana…
Boron nitride nanotubes (BNNT) were synthesized over both Fe 3+ impregnated MCM-41 (mobil composition of matter no. 41) and Fe 2 O 3 /MCM-41 complex catalyst systems at relatively low temperatures for 1 h by the chemical vapor deposition technique in large quantities. The formation of BNNT was tailored at different re…
Abstract The roster of materials exhibiting metal–insulator transitions with sharply discontinuous switching of electrical conductivity close to room temperature remains rather sparse, despite the fundamental interest in the electronic instabilities manifested in such materials and the plethora of potential technologi…
The acid-catalyzed condensation reaction of resorcinol and bisdimethoxyacetals gave rise to rim-to-rim connected bisresorcinarenes in good yields. In the presence of ethanol, the homoditopic bisresorcinarenes assembled to form supramolecular polymers via hydrogen bonding interactions. The fibrous morphologies of the s…
The combination of gasoline direct injection and turbocharging is a promising method to reduce the fuel consumption of internal combustion engines through engine downsizing, which leads to increased engine efficiencies and a reduction of CO 2 emissions at a comparable power output. Spray-guided direct injection allows…
Indirect nanoplasmonic sensing, INPS, as the key step forward, facilitates the use of nanoplasmonic sensor technology in highly demanding environments in terms of temperature (up to 850 °C, so far), chemical harshness (strongly oxidizing and reducing atmospheres), and pressure for in situ and real time probing of cata…
Ultraviolet-ozone-treated poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS)was used as the anode buffer layer in copper phthalocyanine (CuPc)/fullerene-based solar cells. The power conversion efficiency of the cells with appropriated UV-ozone treatment was found to increase about 20% compared to the…
Abstract Reactive hot‐melt polyurethane adhesive (RHMPA) is moisture‐curing polyurethane (PU) adhesive whose main component is an isocyanate‐terminated PU prepolymer that can be cured after application by reaction with ambient moisture. Two series of RHMP‐containing poly(tetramethylene glycol) (PTMG) of different mole…
Here we report the results of a multifrequency (~9, 20, 34, 239.2, and 336 GHz) variable-temperature continuous wave (cw) and X-band (~9 GHz) pulse electron spin resonance (ESR) measurement performed at cryogenic temperatures on potassium split graphene nanoribbons (GNRs). Important experimental findings include the f…
The globalisation we face nowadays derives from the fact that, by starting from the technological and economical development, a significant number of human activities is situated on such a large scale and scope that they exceeded the national borders within the limits of which the sovereign states exercise their right…
Abstract Multiferroic ceramics Bi 0.9 La 0.1 Fe 1− x Ru x O 3 ( x = 0%, 1% and 3%) were prepared using a solid-state reaction process. The structural transformation from rhombohedral to pseudocubic was confirmed in the Ru-doped samples via x-ray diffraction investigation, and the improved dielectric properties are asc…
Using time-resolved resonant soft x-ray diffraction, we measure the evolution of the full three-dimensional scattering volume of the antiferromagnetic superlattice reflection in the single-layer manganite La${}_{0.5}$Sr${}_{1.5}$MnO${}_{4}$on femtosecond time scales following photoexcitation. We find that the in-plane…
Abstract A novel method making use of block copolymer self‐assembly in nematic liquid crystals (LCs) is described for preparing macroscopically oriented nanofibrils of π‐conjugated semiconducting polymers. Upon cooling, a diblock copolymer composed of regioregular poly(3‐hexylthiophene) (P3HT) and a liquid crystalline…
The spatial distributions and relative abundances of electronically excited H atoms, OH, CH, C(2) and C(3) radicals, and CO molecules in microwave (MW) activated CH(4)/CO(2)/H(2) and CO/H(2) gas mixtures operating under conditions appropriate for diamond growth by MW plasma enhanced chemical vapor deposition (CVD) hav…
We developed a new synthetic method for bicyclo[2.2.2]octadiene (BCOD)-fused porphyrin (1), a tetrabenzoporphyrin (TBP, 2) precursor that is well-known as a good material for use in organic electronic devices. The newly developed method synthesizes the BCOD-fused pyrrole intermediate (which is the most important inter…
To enable mechanical milling of small (0.1–1.0 g) samples, a cylindrical grinding vessel machined from polypropylene and furnished with tungsten carbide rods has been designed and produced for use inside the conventional jar of a McCrone Micronizing Mill. The vessel is about one-seventh the volume of the conventional…
Abstract To enhance the ablation performance and mechanical strength of silicone rubber (SR), pristine multiwalled carbon nanotubes (MWNTs) were dispersed in the polymer matrix using dispersion kneader and two roller mixing mill. Electrical resistivity (100–300°C) was reduced with increasing filler concentration in th…
The spatial distribution of radiation damage (assayed by increases in atomic B factors) to thaumatin and urease crystals at temperatures ranging from 25 to 300 K is reported. The nature of the damage changes dramatically at approximately 180 K. Above this temperature the role of solvent diffusion is apparent in thauma…
We developed a new peptide, natural phytochelatin (PC), which tightly binds to CdSe/ZnS quantum dots' (QDs) surfaces and renders them water-soluble. Coating QDs with this flexible and all-hydrophilic peptide offers high colloidal stability, adds only 0.8-0.9 nm to the radius of the particles (as compared to their orig…