Materials Literature
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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…
We here present results of a crystal-chemical study of a suite of pyrochlore-group minerals front the holocrystalline syenitic ejecta scattered within the Plio-Pleistocene pyroclastic deposits of Latium, in central Italy. Despite their high actinide content, the samples Studied are non-metamict owing to their young ag…
The possibility of formation of a nanocrystalline structure (with a grain size smaller than 100 nm) in four Al-Mg-Sc alloys with 3.1–5.9% Mg during severe plastic deformation by torsion at a hydrostatic pressure of 6 GPa (high-pressure torsion (HPT)) has been studied. Room-temperature HPT of the alloys is shown to pro…
The ability to track multiple compounds through a combinatorial synthesis on solid support particles can be a challenging exercise. A novel solution to this problem is to use the optical characteristics of each support particle to identify the biomolecule synthesized on its surface. To achieve this, we have synthesize…
Novel Zn1-xMnxSe one-dimensional nanostructures-straight nanowires (x = 0.1 and 0.3), zigzagged nanobelts (x = 0.4), and toothed nanosaws (x = 0.4)-were synthesized using the chemical vapor deposition method. They all consisted of single-crystalline wurtzite ZnSe crystals, irrespective of the Mn content. In particular…
Data on phosphates with the structure of biogenic whitlockite mineral [analog of low-temperature modification of β-Ca3(PO4)2] were analyzed. The possibility of isomorphic substitution of cations in phosphates with whitlockite structure was evaluated and formation of solid solutions of various compositions involving el…
Aerogels (AGs) are ultralow-density nanoporous solids that have numerous potential applications. However, as most AGs are strong insulators with poor mechanical properties, direct studies of the complex nanoporous structure of AGs by methods such as atomic force and conventional scanning electron microscopy (SEM) have…
Charcoal was prepared from coconut shell and activated at three temperatures 300, 350 and 400°C in constant flow of air or nitrogen. Adsorption of oxalic acid and maleic acid from their aqueous solution on charcoal was studied. Oxalic acid gave Langmuir type of adsorption isotherm indicating monolayer formation but ma…