Materials Literature
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A self-assembled thin film edge emitter has been fabricated. The unique fabrication process requires only a tetrahedral amorphous carbon (ta-C) thin film with one photolithography step to generate a three-dimensional structure. A high emission site density was achieved compared with that obtained from a flat ta-C film…
The phase relations and equations of state of ZrO 2 and HfO 2 high-pressure polymorphs have been investigated by means of in situ observation using multi-anvil type high-pressure devices and synchrotron radiation. Baddeleyite (monoclinic ZrO 2 ) transforms to two distorted fluorite (CaF 2 )-type phases at 3-4 GPa depe…
A carbon-supported platinum electrocatalyst was modified with molybdenum using surface organometallic chemistry. The catalyst was characterized using transmission electron microscopy, cyclic voltammetry (CV), polarization studies, and in situ fluorescence extended X-ray absorption fine structure (EXAFS) studies. The C…
The structural characterization of drug substances by X-ray diffraction plays a central role during the development of pharmaceuticals. While powder diffraction is usually employed for the identification of solid phases, the single crystal technique yields detailed structural information, which is needed for purity co…
The paper presents the X-ray photoelectron spectra (XPS) of the valence band and core levels of semiconductor ferroelectric Sb2S3 single crystals, which show weak phase transitions and anomalies of various physical properties. The XPS were measured with monochromatized Al K α radiation in the energy range 0-1450 eV an…
This paper describes the manufacture and testing of polymer matrix Terfenol-D particulate composites fabricated with a [112] preferred crystal orientation. The results demonstrate that crystal orientation permits higher saturation strain than previously obtained in particulate composites. Oriented particle composites…
The flexural properties of 2D plain-woven Hi-NicalonTM fiber reinforced SiC/SiC composites with various PyC and PyC-SiC multilayers were studied at ambient temperature. The composites were fabricated by chemical vapor infiltration process (CVI). The interlayers were deposited by isothermal CVI process from methane for…
The Behavior of Polypyrrole-Coated Electrodes in Propylene Carbonate Solutions : I. Characterization of PPy Films by a Combination of Electroanalytical Tools and XPS, Levi, M. D., Lankri, Eli, Gofer, Y., Aurbach, D., Otero, T.
First successful syntheses and structural characterization of new core modified meso aryl azuliporphyrins by a simple [3 + 1] methodology are reported.
Ti–Cr–V alloys with a BCC structure have high protium capacities, but it is known that the cyclic properties for the alloys change with varying V content. In this paper, the cyclic properties of the Ti–Cr–V alloys are investigated in view of the crystal structure of the β protide phase, which was measured at the point…
The synthesis of 2, 3, 7, 8, 12, 13, 17, 18-octabromo-meso-tetrakis(2-pyridyl)porphyrin, H 2 Br 8 T 2 PyP , is described, including the comparison of four attempted methods for the demetallation of ZnBr 8 T 2 PyP . One of the methods represents a strategy of demetallation based on the acid-base properties of the macro…
Poly-(1-naphthylamine) films were synthesized potentiodinamically and potentiostatically from 1-naphthylamine in neutral acetonitrile medium using a platinum electrode. These polymer films were investigated by infrared spectroscopy. Contrary to earlier published results neglecting the stereochemistry of the poly-(1-na…
Ion-induced luminescence of alumina was analyzed with a time-resolved spectroscopic method. By using a pulsed ion beam, we selectively observed the prompt and slow components in the total luminescence. The luminescence spectrum showed some broad peaks at 330 nm (F+ center), 410 nm (F center), 510 nm (F2 center), 560 n…
The polymerization of (D, L)-lactic acid in the absence of catalysts was studied. Azeotropic distillation using xylene, gave poly(lactic acid) with very low molecular weight, which however, was further increased by post-curing in an air oven. Moreover degradation phenomena and residual xylene were observed, with this…
Lotus-type porous stainless steel SUS304L has been fabricated by unidirectional solidification under mixed gases of hydrogen and argon. The atmospheric pressure dependence of porosity and pore diameter has been investigated. The porosity is lower if the partial pressure of argon is higher under a constant partial pres…
This short contribution is aimed to describe two plasma processes utilized at the group of the authors for biomedical applications, namely: the grafting process of polar groups intended to obtain stable hydrophilic surfaces on hydrophobic polymers, and the deposition of thin organic coatings highly functionalized with…
The crystal structures of rccc-5,11,17,23-tetracarboxy-4,6,10,12,16,18,22,24-octa-O-methyl-2,8,14,20-tetra(n-undecyl)resorc[4]arene, 1, and its Ca salt, 2, are described. Structural data were analyzed in terms of supramolecular packing motifs of the constituent amphiphilic macrocycles. Monolayer experiments indicate t…
The wear and friction properties of Ti3SiC2-based materials were studied using the pin-on-disc method. The friction coefficient of Ti3SiC2-based material was not very sensitive to normal load, the steady state value, p, increased from 0.4 to 0.5 when the normal load increased from 7.7 N to 14.7 N. The wear volume for…
Micromagnetic NDT techniques like the measurement of the magnetic Barkhausen noise, the incremental permeability and the harmonic analysis of the tangential magnetic field allow deriving inspection procedures to online monitoring and control machinery parts and components in production processes in order to characteri…
A zirconium-doped mesoporous silica with MCM-41-type structure has been used as a support for nickel oxide and tested in the selective catalytic reduction (SCR) of NO with ammonia. From XPS and H2-TPR data, two kinds of catalysts can be prepared, depending on the nickel loading. Thus, low nickel loadings (1 and 3 wt%)…