Materials Literature
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The sensitivity of the impedance characteristics of a laminar flow-based fuel cell (LFFC) to the changes of the voltage, current and fuel concentration is analyzed using the electrochemical impedance spectroscopy (EIS) method. The impedance of the cell measured at different fuel concentrations and voltages is modeled…
ABSTRACT The polyimide (PI) composites reinforced with carbon fibers, glass fibers, and aramid fibers were fabricated by means of a hot‐press molding technique and irradiated by electron or proton for a certain time. The friction and wear behavior after irradiation, sliding against GCr15 steel balls, were evaluated in…
Solid supported ionic liquid can provide high surface area for better CO 2 adsorption as well as reduces the amount of ionic liquid used for CO 2 absorption. In the present work, SiO 2 and Molecular Sieve were impregnated with 10wt% of [hmim][Tf 2 N], and tested for CO 2 adsorption at 10-40 bar. From the screening pro…
Tungsten trioxide (WO3) thin films were deposited by Rf-magnetron sputtering onto Pt interdigital electrodes fabricated on corning glass substrates. NO2 gas sensing properties of the prepared WO3 thin films were investigated by incorporation of catalysts (Sn, Zn, and Pt) in the form of nanoclusters. The structural and…
We have measured the ratio of doubly to singly charged parent ions of pyrene, an aromatic hydrocarbon, for photon energies ranging from threshold to the carbon K edge. Monochromatized synchrotron radiation of the Synchrotron Radiation Center has been used in combination with an ion time-of-flight spectrometer for this…
The synthesis of a Co(III) corrole, [10-(2-[[4-(1H-imidazol-1-ylmethyl)benzoyl]amino]phenyl)-5,15-diphenylcorrolato]cobalt(III), DPTC-Co, bearing a tail motif terminating in an imidazole ligand that coordinates Co(III), is described. The corrole therefore places Co(III) in a similar environment to that in aquacobalami…
Abstract Pd electrocatalysts supported on antimony tin oxide and Vulcan XC-72 were both synthesized via a modified sodium borohydride reduction method. The catalysts were characterized by means of powder X-ray diffraction and cyclic voltammetry. Linear sweep voltammetry, open circuit potential curves and chronoamperom…
To investigate the failure behaviour of thermal barrier coatings (TBCs) on diesel engine piston, YSZ TBCs were sprayed onto the 2A70 aluminium by atmospheric plasma spray. Finite element model was employed to estimate the temperature and stress distributions in TBCs on piston. Both the temperature and stress distribut…
Meta stable embedded nano-sized -particles within a single grain extracted from an alloy having the nominal composition have been examined with X-ray diffraction. By applying the orientational and metric relationships that exist between the hexagonal unit cell of the -particles and the cubic unit cell of the Al-matrix…
Absolute cross sections for single and multiple photoionization of W q + ions have been measured in a photon-ion merged beam setup employing synchrotron radiation from the Advanced Light Source. The experimental data are compared to large-scale close-coupling calculations within the Dirac-Coulomb R-matrix (DARC) appro…
ABSTRACT Polypropylene (PP) was synthesized in the presence of Ziegler–Natta catalysts composed of MgCl2‐TiCl4‐internal donor/AlR3‐external donor. Diisobutyl phthalate is a well‐known internal donor in current PP production. Nevertheless, phthalates are often blamed as endocrine disruptors. The objective is to find an…
The pressure and temperature at the same location in the middle cross section of Sugi wood were measured simultaneously during radio-frequency/vacuum (RF/V) drying. The distribution and variation of pressure and temperature in the wood cross section were investigated in different drying stages. The pressure behavior d…
This study seeks to clarify the mechanism of strain development in curing a thick composite structure with a temperature distribution in the thickness direction. Strain developed during curing can be separated into two parts according to the causes. One is chemical cure shrinkage of the matrix; the other is thermal sh…
The high intensity and high repetition rate of the European X-ray Free-Electron Laser, presently under construction in Hamburg, requires silicon sensors which can stand X-ray doses of up to 1 GGy for 3 years of operation at high bias voltage. Within the AGIPD Collaboration the X-ray-radiation damage in MOS Capacitors…
In this work, we focused on investigations of mechanical properties of SiN x and diamond‐like carbon thin films deposited by plasma‐enhanced chemical vapour deposition method for application in optical devices or solar cells. Mechanical properties of thin films deposited on clean and oxidized silicon substrates were d…
The adsorption of tributyltin (TBT), onto three mesoporous silica adsorbents functionalized with calix[4]arene, p-tert-butylcalix[4]arene and p-sulfonatocalix[4]arene (MCM-TDI-C4, MCM-TDI-PC4 and MCM-TDI-C4S, respectively) has been compared. Batch adsorption experiments were carried out and the effect of contact time,…
The reaction kinetics of gasification are important for the design of gasifiers using biomass feedstocks, such as lignin, produced in biorefinery processes. Condensed and uncondensed lignin samples used in the present study were prepared using the SEW (SO2-ethanol-water) fractionation process applied to spruce wood ch…
A new spectroelectrochemical cell for in situ neutron reflectometry was developed. Electrochemical reactions were determined using this in situ cell with a LiMn 2 O 4 /SrRuO 3 multi layer thin film. Changes in interfacial structures on the surface of the thin film are also observed by in situ neutron reflectivity meas…
Resonant soft X-ray scattering measurements become one of powerful techniques to probe charge, orbital and spin orderings in strongly correlated electron systems. We have developed new in-vacuum diffractometer with a large vacuum chamber to solve experimental limitations of in-vacuum measurement in soft X-ray energy r…
An improved preparation of mesoionic heterocycles 1,3-diazolium-4-thiolates by [3 + 2] cycloadditions of münchnones with aryl isothiocyanates is reported. The process takes place with high or complete regioselectivity, and fast and clean transformations are observed under microwave heating in DMF. DFT calculations sup…