Materials Literature
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The anatase nanocondensates produced by energetic pulse laser ablation on Ti target under oxygen background gas have been observed by transmission electron microscopy. They were found to coalesce in approximately parallel orientation on the (001) plane to form dislocations and in twin orientation on the (112) plane to…
Hydrothermal reactions of Na2[Mo2O4EDTA].5H2O and LnCl3.6H2O produce the chiral layered lanthanide molybdate oxides pillared by the chiral cluster ligand, [Ln(H2O)MoO4]2[lambda-Mo2O4EDTA] (Ln = Gd, 1; Eu, 2; Tb, 3; Y, 4). The tetradentate molybdate bridges Ln3+ to form a square grid structure, which is pillared by the…
Ge S 2 /metals thin film bilayered structures were examined for write-once-type optical recording materials. Decreases in the reflectance of GeS2∕Ag and GeS2∕Cu structures at a certain elevated temperature were observed. The phenomena were attributed to the formation of metal sulfides with high optical absorption coef…
Micro and nano structures of carbonised polymers resulting from the pyrolytic transformation of polymer structures are presented. Polymers have become increasingly popular as materials for micro/nano electromechanical systems (MEMS/NEMS), especially for chemical or biological application. Focus is on the transformatio…
In-plane magnetic anisotropy of a (Ga,Mn)As film has been investigated by measuring anisotropic magnetoresistance as a function of the direction of in-plane magnetic fields. Two Hall bars with channel direction [-110] or [100] were fabricated to detect the in-plane magnetization reversal process from both the longitud…
The effect of γ-irradiation on the structural and the electrical propertiesof rare earth ferrite of the general formula Co0.5Zn0.5CeyFe2-yO4 (0.0≤y≤ 0.2) isdiscussed. X-ray diffraction pattern of irradiated and un- irradiated samplesshowed the formation of cubic spinel structure. The obtained data show that theelectri…
Abstract Ammonium nitrate (AN) is used as an oxidant in a series of systems with a wide spectrum of applications, from explosive compositions up to smokeless stoichiometric self‐burning compositions with low combustion temperature. The knowledge of the thermal stability of such compositions is of great importance in u…
We have designed, synthesized, and evaluated the physical properties of some high birefringence (Deltan) isothiocyanato phenyltolane and quaterphenyl liquid crystals. These compounds exhibit Deltan~0.48-0.52 at room temperature and wavelength lambda=633 nm. Laterally substituted short alkyl chains and fluorine atom el…
Compensation for phase dispersion in horizontal-switching liquid crystal cell for improved viewing angle, Lee, Joun-Ho, Son, Jung-Hee, Choi, Seong-Wook, Lee, Wa-Ryong, Kim, Kyung-Mi, Seok Yang, Jin, Chang Kim, Jae, Choi, Hyunchul, Lee, Gi-Dong
A new methodology is presented to assure numerically reliable integration of the magnetization slope in the Jiles-Atherton model of ferromagnetic core hysteresis. Two hardware description language (HDL) implementations of the technique are presented: one in SystemC and the other in very-high-speed integrated circuit (…
Abstract Abstract: Aqueous dispersion of polyurethane ionomer (PUD), based on poly (propylene glycol) (PPG) as soft segment, isophorone diisocyanate (IPDI) as diisocyanate, dimethylol propionic acid (DMPA) as ionic center, hydrazine (HZ) as crosslinker and triethyl amine (TEA) as neutralizer, was reinforced with 1 to…
Using the time-dependent formalism of the density functional theory (time-dependent density functional theory (TDDFT)), the energies and intensities of the electronic transitions of some metal phthalocyanines of transition metals and of their anionic forms with different electron localization are studied quantum chemi…
The absorption spectra, photoconductivity, and electrical conductivity of films of new polycomplexes of 4-methacyloyloxy-(4′-carboxy-3′-oxy)azobenzene and 4-methacryloyloxy-2-nitro-(4′-carboxy-3′-oxy)azobenzene with cobalt were investigated with switched-off and switched-on external electric fields. The effect of an e…
Liquid Crystal Alignment and Electrooptical Characteristics of Vertical Alignment Liquid Crystal Display on SiOx Thin Film Obliquely Deposited by Sputtering, Choi, Sung-Ho, Hwang, Jeoung-Yeon, Kim, Sungyeon, Oh, Byeong-Yun, Myoung, Jae-Min, Seo, Dae-Shik
Extended soft tissue defects resulting from injuries or tumor resections are still an unresolved problem in plastic and reconstructive surgery because adequate reconstruction is difficult. Immature adipogenic precursor cells, called preadipocytes, which are located between mature adipocytes in adipose tissue, represen…
Low cost resistance butt welds between a similar Ti–6Al–4V alloy couple have been fabricated using a Gleeble thermomechanical simulator. The optimisation of the key bonding parameters (pressure, time, temperature and environment) required to produce high quality joints with near parent properties is discussed. Metallo…
We present a new method for the numerical calculation of the equilibrium crystal shape around a facet. Our method is based on the transfer matrix method with the product-wave-function renormalization group (PWFRG) algorithm for the asymmetric density matrix, which is an extension of the density matrix renormalization…
In this paper, we review the potential applications of single-walled carbon nanotubes in three areas: passives (interconnects), actives (transistors), and antennas. In the area of actives, potential applications include transistors for RF and microwave amplifiers, mixers, detectors, and filters. We review the experime…
Arrays of 60-nm-diameter pores are synthesized by the electrochemical anodization of an aluminum substrate. Fe is electrodeposited in the pores to obtain the nanowire arrays. X-ray diffraction patterns and energy dispersive X-ray spectroscopy (EDS) show that the deposited material is pure iron. The Fe nanowire arrays…
Fluorinated derivatives containing different amounts of fluorocarbon groups in the surface layer of the molecular structure have been synthesized by the chemical modification of a polyallylcarbosilane dendrimer of the sixth generation via hydrosilylation and heterofunctional condensation procedures. The fluorocontaini…