Materials Literature
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Abstract Summary: Cavitation in low molecular weight liquids under tension and in crystalline polymers during tensile drawing was recapitulated. The review indicated that the amorphous phase of crystalline polymers at temperature above its glass transition temperature differs markedly from low molecular weight liquids…
A fast-neutron detector for time-resolved beam measurements at spallation neutron sources is presented. The device features a p -type/intrinsic/metal Schottky barrier structure where the active (intrinsic) detection layer is a 150 μm thick single-crystal diamond obtained by chemical-vapour deposition. Coupling to fast…
A simple method to make a switchable liquid crystal (LC) Fresnel lens with high diffraction efficiency and a low driving voltage was proposed based on the photo-induced surface modification of the vertical alignment layer. UV illumination alters the pretilt angle of alignment layers, a Fresnel zone-distribution hybrid…
Azita K. Cuevasa, Eric N. Liberdaa, Patricia A. Gillespiea, Jorge Allinaa & Lung Chi Chen*aa Department of Environmental Medicine, New York University School of Medicine, Tuxedo, NY, USAAddress for Correspondence: Lung Chi Chen, Ph.D., Department of Environmental Medicine, New York University School of Medicine, Tuxed…
We optimize the niobium doping concentration in BaCo 0.7 Fe 0.3− x Nb x O 3−δ ( x = 0.08−0.14) and find the increase of niobium content improves the chemical stability of oxides significantly but influences the oxygen permeation of compounds little. The effects of niobium doping on BaCo 0.7 Fe 0.3− x Nb x O 3−δ compou…
ZnO transparent thin-film transistors with MgO gate dielectric were fabricated by in-situ metal organic chemical vapor deposition (MOCVD) technology. We used an uninterrupted growth method to simplify the fabrication steps and to avoid the unexpectable contaminating during epitaxy process. MgO layer is helpful to redu…
The adsorption behaviors of 4-mercaptobenzoic acid on silver and gold nanoparticles were studied by surface-enhanced Raman scattering (SERS) and density functional theory. The silver and gold films by electrodeposition have the same excellent characteristics as SERS-active substrates. At the same, the SERS spectra ind…
The influence of different test methods on dc pollution flashover voltage of insulator strings is presented in this paper. In addition, the relationship among the flashover voltages obtained by different voltage applied methods is put forward. Subsequently, the pollution flashover phenomenon is investigated using the…
Ultrananocrystalline diamond (UNCD)/nonhydrogenated amorphous carbon (a-C) composite films were grown in vacuum using a coaxial arc plasma gun. From the X-ray diffraction measurement, the UNCD crystallite size was estimated to be 1.6 nm. This size is dramatically reduced from that (2.3 nm) of UNCD/hydrogenated amorpho…
Chitosan is extensively used in medicine and medical textiles for drug delivery and other applications because of its biocompatibility, biodegradability and inherent antimicrobial properties. In this study, we demonstrated a manipulating route with suitable process conditions to synthesize chitosan nanoparticles which…
The high-temperature scheelite phase of Sr 0.02 La 0.98 NbO 4 materials has been retained to room temperature via vanadium substitution for the Sr 0.02 La 0.98 Nb 1− x V x O 4−δ compositional range of 0.25 ≤ x ≤ 0.325. Such structural stabilization avoids the characteristic break in the thermal expansion coefficient (…
This paper presents a new partial discharge (PD) location technique for power cables. Unlike commonly used time-domain reflectometry (TDR) methods, this technique is based on the analysis of phase difference between the direct and reflected waves of a PD pulse measured at the cable end. The phase difference at various…
An integration scheme for carbon nanotube via interconnects is described to produce nanotube densities of 2.5 1012tubes/cm2or 8 1012walls/cm2on metallic Al-Cu lines, an order of magnitude beyond the previous state of art, and, for first time, close to that needed for implementation.
The unique characteristics of dendrimers make them attractive candidates as drug carriers. However, the toxicity associated with dendrimers is a basic hurdle in their biomedical application. To ensure development of dendrimer based safe and effective delivery systems, the effect of dendrimers on human erythrocytes (RB…
Abstract Summary: In this study, chitosan nanocomposite films were prepared using a solvent‐casting method by incorporation of an organically modified montmorillonite (Cloisite 10A). The effect of filler concentration on the water vapor permeability, oxygen permeability, mechanical and thermal properties of the compos…
The origin of red clayey soils developed on limestones has been largely questioned. We have analyzed thick red soils on Eocene-Pliocene limestones of the Yucatán peninsula (with detail in the Kantunil Kin area). The morphological, geochemical and mineralogical characteristics were interpreted as a record of pedogenesi…
In nature, some peptides induce precipitation of silicic acid into silica nanoparticles such as is found in marine algae called diatoms. However, polybasic polymers can act as peptide mimics; one such polymer, polyethyleneimine (PEI), has the advantage that it is stable at room temperature and is inexpensive, in compa…
We have presented a simple but effective method to design flexible actuators. This process relies on understanding the behavior of a simple unit cell element built out of SMA sheet. The unit cell effectively uses the properties of flat SMA sheets: it operates in the bent region where more force is generated; it minimi…
Hydrogenation properties of the vanadium-rich ternary V-Ti-Cr alloy was investigated, which is of interest as a hydrogen carrier for fuel-cell vehicles. The dependence of hydrogen content of the hydrides with low plateau pressure (β phase) on the unit cell volume of the dehydrogenated alloys (α phase) is found to be d…
Abstract Through addition reaction of Schiff‐base terephthalylidene‐bis‐( p ‐aminophenol) ( DP‐1 ) and diethyl phosphite (DEP), a novel phosphorus‐modified epoxy, 4,4'‐diglycidyl‐(terephthalylidene‐bis‐( p ‐aminophenol))diphosphonate ether ( EP‐2 ), was obtained. An modification reaction between EP‐2 and DP‐1 resulted…