Materials Literature
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We have studied the effect of added water on the nonaqueous foaming properties of diglycerol fatty acid ester nonionic surfactant systems. Diglycerol monomyristate (designated as DGM) could not foam in nonpolar oils squalane and hexadecane at normal room temperature. Nevertheless, addition of a small amount of water i…
Arrays of ZnO nanorods with different, user-controlled, diameters were formed on Si substrates by 193 nm pulsed laser deposition in a low background pressure of oxygen. The effect of nanorod diameter on the photoluminescence exhibited by these arrays was investigated, as a function of incident ultraviolet (UV, 325 nm)…
The structure of the charge-transfer complex hexakis(n-hexyloxy)triphenylene-2,4,7-trinitro-9-fluorenone (HAT6-TNF) has been characterized by neutron scattering, X-ray diffraction (XRD), optical microscopy, and dielectric relaxation spectroscopy (DRS). On the basis of these data and the 1:1 stoichiometry, a consistent…
A new polycarbonate urethane (PCU-I) was synthesized from aliphatic monomers, i.e. polyhexamethylene carbonate diol and 4,4'-methylene-bis cyclohexane diisocyanate, a mixture of low molecular diols, and castor oil (containing mainly the triglyceride of 12-hydroxyoleic acid). The second synthesized polymer (PCU-II) did…
The kinetics of the reactions of O- and O2- with O2(a1Deltag) have been studied at 300 K in a selected ion flow tube (SIFT). The O2(a1Deltag) concentrations have been determined using emission at 1270 nm from the O2(a1Deltag, v=0-->X3Sigmag-, v=0) transition measured with an InGaAs detector calibrated against absolute…
Various models of the H2/H2O/Ni/SZ (SZ = stabilized zirconia) electrode kinetics have been presented in the literature in order to explain the reported experimental data. However, there has been a strong tendency of using a limited set of data to verify a given model, disregarding other data sets, which do not fit the…
Three new series of symmetric dimers composed of bent‐core molecules connected by a flexible alkylene spacer have been synthesized and their mesomorphic properties studied. The effect of varying the length of the terminal chains for fixed odd and even spacers, as well as varying the spacer length for a fixed terminal…
Capable materials for solid oxide fuel cell cathodes have to provide high electrocatalytic activity for oxygen reduction as well as sufficient electronic conductivity and good ionic transport properties. This study compares the electrical transport properties and the oxygen exchange properties of two promising cathode…
This paper is focused on the characterization of polyelectrolyte-modified inverse microemulsions and their use as templates for the synthesis of magnetite nanoparticles. It is shown that the cationic polyelectrolyte poly(diallyldimethylammonium chloride) (PDADMAC) of low molar mass can be incorporated into the individ…
The influence of the pore network geometry and interparticle long-distance electric coupling on the ferroelectric phase transition in small particles embedded into mesoporous matrices is considered. It was shown that the temperature of the ferroelectric phase transition in a system of electrically linked particles can…
The use of metallic interconnects for SOFC application leads to the degradation of the cell performance due to Cr migration. In order to avoid the cathode poisoning, spinel type coatings were developed and deposited on the cathode contact side of a ferritic interconnect, using Atmospheric Plasma Spraying. A porous con…
A facile solution-chemical method has been developed to be capable of encapsulating a multiwalled carbon nanotube (MWCNT) with ZnS nanocrystals without using any bridging species. The thickness of the ZnS shell can be tuned easily by controlling the experimental conditions. The optical properties of the MWCNT/ZnS hete…
Rückgrat unnötig: Aus einem gastmodifizierten Cyclodextrin (CD) ohne Polymerrückgrat wurde ein supramolekulares Hydrogel synthetisiert. Das β-CD bildet als Folge von Wirt-Gast-Wechselwirkungen supramolekulare Fibrillen, und Wasserstoffbrücken zwischen den CDs vernetzen die Fibrillen zum Hydrogel. Gel-Sol-Übergänge wer…
Trimesic acid and phenyl ether were in-situ polymerized as A 3 and B 2 monomers, respectively, in the presence of a fixed amount (10 wt %) of multiwalled carbon nanotube (MWNT) to afford hyperbranched poly(ether ketone)s (PEK's)/MWNT nanocomposites. The feed ratios of A 3 and B 2 monomers vary from 3:2 to 1:2 in the A…
In anode supported SOFC, anode substrate provides the major mechanical support. This work is devoted to establish the improvement in mechanical properties of the tapecast, laminated Ni-YSZ anode substrate. The tested configuration consists of a dense, ~ 20μm YSZ coating on a 1-2mm thick porous Ni-YSZ cermet. The poros…
The impedance of anode supported single cells (Ni/8YSZ anode; La0.58Sr0.4Co0.2Fe0.8O3 cathode; 8YSZ electrolyte; Area=1 cm²) was characterized in a broad measuring range of temperature and air/fuel gas composition. The data has been analysed by calculating the distribution function of relaxation times (DRT). DRT compu…
Cone-shaped YSZ electrolyte cylinders with a wall thickness of less than 0.2mm have been fabricated using slip casting technique. Single solid oxide fuel cell (SOFC) units have been made by applying La0.6Sr0.4Co0.2Fe0.8O3 (LSCF)- Ce0.9Gd0.1O1.95 (GDC) cathode material on the outside of the cylinders and NiO- GDC anode…
Gebündelte Proteine: Mit Streptavidin als Linker zwischen Eisen(II)-Terpyridinbis(biotin)-Einheiten entsteht ein eindimensionales metall-organisches Proteingerüst (MOPF). In Gegenwart von Calciumionen und Kohlendioxidgas bilden die MOPFs Proteinbündel, die als Templat der Biomineralisation von Calcit wirken.
At 2004, Osaka Gas Co., Ltd. and Kyocera Corporation launched joint development of SOFC residential cogeneration system, aiming for the commercialization. To demonstrate the technical achievement, we installed SOFC residential cogeneration system in a house and carried out operation. At rated power, ac 1kW, net ac eff…
We studied the effects of catalyst introduction methods using poly(amidoamine) (PAMAM) dendrimers on the nickel patterning of polyelectrolyte multilayer (PEM)-coated substrates. Three different approaches to palladium catalyst introduction using microcontact printing as the patterning technique were utilized and compa…