Materials Literature
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Highly porous ceramics are critical components of Solid Oxide Fuel Cells. Nevertheless, their mechanical properties are poor and not fully understood. Herein, Discrete Element simulations are used to quantitatively assess the relation between the particulate microstructure of highly porous ceramics and their mechanica…
We investigated the structural, electronic and vibrational properties of amorphous and cubic Ge(2)Sb(2)Te(5) doped with N at 4.2 at.% by means of large scale ab initio simulations. Nitrogen can be incorporated in molecular form in both the crystalline and amorphous phases at a moderate energy cost. In contrast, insert…
The influence of total surface energy on bacterial adhesion has been investigated intensively with the frequent conclusion that bacterial adhesion is less on low-energy surfaces. However, there are also a number of contrary findings that high-energy surfaces have a smaller biofouling tendency. Recently, it was found t…
Addition of the amine-boranes H(3)B⋅NH(2)tBu, H(3)B⋅NHMe(2) and H(3)B⋅NH(3) to the cationic ruthenium fragment [Ru(xantphos)(PPh(3))(OH(2))H][BAr(F)(4)] (2; xantphos=4,5-bis(diphenylphosphino)-9,9-dimethylxanthene; BAr(F)(4)=[B{3,5-(CF(3))(2)C(6)H(3)}(4)](-)) affords the η(1)-B-H bound amine-borane complexes [Ru(xantp…
Efficient Nd3+→Yb3+ resonant and phonon-assisted energy transfer processes have been observed in phosphate glasses and have been studied using steady-state and time-resolved optical spectroscopies. Results indicate that the energy transfer occurs via nonradiative electric dipole-dipole processes and is enhanced with t…
We present a universal strategy for the facile synthesis of degradable and electroactive block copolymers and organogels (DEBCGs) based on aniline oligomers and polyesters in a two-step approach, here exemplified by the preparation of a series of DECBCGs based on aniline tetramer (AT) and poly(ε-caprolactone) (PCL). P…
Magnetic properties and magnetocaloric effects (MCEs) of the intermetallic RNiIn (R = Gd-Er) compounds have been investigated in detail. GdNiIn and ErNiIn compounds exhibit a ferromagnetic (FM) to paramagnetic (PM) transition around the respective Curie temperatures. However, it is found that RNiIn with R = Tb, Dy, an…
The feasibility of using mineral nano- and micro-fillers as replacement of copolymer polyols in flexible foams was examined. Nano-fillers were nano-clays, a natural montmorillonite (Cloisite Na + ) and montmorillonite modified with an organic quaternary ammonium salt (Cloisite 10A), and nano-silica dispersed in methyl…
Abstract A simple and inexpensive, single step synthesis of silver nanoparticles was achieved using poly(methyl vinyl ether‐ co ‐maleic anhydride) (PVM/MA) both as a reducing and stabilizing agent. The synthetic process was carried out in aqueous solution, making the method versatile and ecofriendly. The synthesized p…
The surface and interface enthalpies of CeO 2 were studied by high temperature oxide melt solution calorimetry combined with water adsorption calorimetry. The surface enthalpies of the hydrated and anhydrous surfaces are 0.86 ± 0.02 and 1.16 ± 0.02 J/m 2 , respectively. The water adsorption enthalpies are similar for…
Electrostatically doped graphene p-n junctions can be formed by applying large source-drain and source-gate biases to a graphene field-effect transistor, which results in trapped charges in part of the channel gate oxide. We measure the temperature distribution in situ during the electrical stress and characterize the…
The oxidation process of boron nitride nanotubes was thoroughly investigated, and a slow oxidation characteristic was clearly revealed. Subsequently, the controllable oxidation process was utilized to break the sturdy structure of the boron nitride nanotubes to fabricate shortened nanotubes. The shortened boron nitrid…
Ein neues Isomer: 11,12-Dimesitylindeno[2,1-a]fluoren wurde synthetisiert und kristallin isoliert. Es zeigt eine deutliche Bindungslängenalternanz im kondensierten Ringsystem, einen begrenzten Singulettdiradikalcharakter und einen schwach antiaromatischen Charakter. Seine optischen und elektrochemischen Eigenschaften…
In this Article, we studied the enzymatic hydrolytic biodegradation behavior of a novel multiblock thermoplastic polyurethane (TPU) system, which incorporates polyhedral oligomeric silsesquioxane (POSS) into linear biodegradable thermoplastic polyurethanes containing poly(ε-caproactone) (PCL) and polyethylene glycol (…
Dense (1‐ x ) BaTiO 3 ‐ x BiYbO 3 (BBTYb) ceramics were fabricated by the solid state reaction method. According to X‐ray diffraction data, the average crystal symmetry of x ≤ 0.04 ceramics is described by the non‐centro symmetric tetragonal P 4 mm space group, whereas the average crystal symmetry of x ≥ 0.06 ceramics…
Studies on the effect of the foams’ polymeric matrix’ properties on the tension and compression properties of pour rigid polyurethane (PUR) foams, apparent core density 65—70 kg/m 3 , at 296 and 77 K were carried out. PUR foams were produced by the hand mixing method from polyol systems that comprised polyether, polye…
In order to enhance the energy density (BH)max as a key property for permanent magnet applications, exchanged-coupled trilayers of SmCo5/Fe/SmCo5 with fixed SmCo5 layer thicknesses (25 nm) and varying soft magnetic Fe film thickness have been epitaxially grown by pulsed laser deposition on Cr buffered MgO(110) substra…
The (1‐ x ‐ y )K 0.5 Na 0.5 NbO 3 ‐ x CaZrO 3 ‐ y LiNbO 3 (KNLNCZ‐ x ‐ y ) lead‐free piezoelectric ceramics were fabricated by conventional technique, and the effect of the addition of CaZrO 3 and LiNbO 3 on the phase transitions and piezoelectric properties of the KNN ‐based ceramics was investigated. The addition of…
Microencapsulated ammonium polyphosphate (MAPP) with polyurethane resin has been prepared by in situ polymerization. The combination of MAPP and boron phosphate (BP) on the flammability properties of thermoplastic polyurethane (TPU) was studied by vertical burning (UL‐94) tests, limiting oxygen index tests, cone calor…
Migration kinetics of oxygen vacancies in BiFe(0.95)Mn(0.05)O(3) thin film were investigated by the temperature -dependent leakage current as well as the electric field and temperature-dependent impedance spectroscopy. The BiFe(0.95)Mn(0.05)O(3) is of an abnormal leakage behavior, and an Ohmic conduction is observed r…