Materials Literature
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In this report, we present cyclohexylcyanine, a phthalocyanine analogue with two cyclohexane units incorporated into the backbone of the macrocycle; in the free base, the ionizable protons lie on the periphery of the ring, and when metalated with silver the macrocycle binds to the metal via these same meso nitrogen at…
Abstract Motivated by the study of self‐cleaning surfaces, the interaction between a spherical solid particle and a water droplet is studied on the microsale level, in terms of the balance forces and the surface properties. To define the forces acting on the solid‐liquid interface, the meniscus depression is computed…
Purpose The magnetic modeling of materials has been focused on computing magnetization and forces in devices. With increasing efforts to make energy efficient devices, attention must now be paid to hysteresis losses in magnetizing processes. The purpose of this paper is to discuss the pertinent parameters that determi…
Acute toxicity and antioxidant activity of hydroethanolic leaves extract of Solenostemon monostachyus (Esomo) were investigated. The method used for antioxidant evaluation was 2, 2-Diphenyl-1-picrylhydrazyl (DPPH) and the method of Miller & Tainter was employed for the acute toxicity. The lethal dose inducing deat…
This work reports the formation of stable nanoassemblies of short pentapeptides LKLKL (pepI) and their mutated sequence LKKLL (pepII) obtained from their Langmuir-Blodgett films transferred onto hydrophilic and hydrophobic silicon substrates. The adsorption and assembly of the LB films of these peptides on solid surfa…
Grafted rubber films were prepared by mixing various proportions of acrylamide with natural rubber latex (NRL) with varying proportions by gamma radiation from Co-60 source at room temperature. Tensile strength, tear strength, elongation at break, permanent set, and swelling ratio, gel content and degree of grafting w…
The electronic and electromechanical properties of complex oxide superlattices are closely linked to the evolution of the structure and electrical polarization of the component layers in applied electric fields. Efforts to deduce the responses of the individual components of the superlattice to applied fields have foc…
We have theoretically suggested a temperature-dependent superconducting cloak whose cloaking frequency can be externally controlled, since the dielectric constant of the superconductor is well tuned with the operating temperature. The results show that this tunable cloak exhibits a fine tunability in the low-temperatu…
We report the preparation of narrow-sized well-separated spherical aramides nanoparticles containing pyridine using the precipitation polymerization method. The average diameter of the particles ranges from 50–98 nm. Particles of pyridine containing polymers exhibited large diameter compared to their phenylene counter…
Depending on the minimum size of their micro/nanostructure, thin films can exhibit very different behaviors and optical properties. From optical waveguides down to artificial anisotropy, through diffractive optics and photonic crystals, the application changes when decreasing the minimum feature size. Rigorous electro…
Research Article| December 01 2010 Calcite precipitation from aqueous solutions with different calcium and hydrogen carbonate concentrations Kai Zeppenfeld Kai Zeppenfeld 1Scientific Consultant Schottlandstr. 4a, D-59368 Werne, Germany Tel.: +49 2389 927458 Fax: +49 2389 533662; E-mail: drkaizepp@t-online.de Search fo…
The selective adsorption of carbon nanotubes (CNTs) on a pH-reversible PDMAEMA patterned gold surface is presented. In acidic conditions, a selective CNTs adsorption onto the polymer brushes is obtained due to ammonium-π interactions. The reversible behavior was shown by successive treatments in both alkaline and acid…
Anion exchange reactions of nanodimensional layered metal hydroxide compounds are utilized to create materials with targeted physical and chemical properties and also as a means for controlled release of intercalated anions. The kinetics of this important class of reaction are generally characterized by model-based ap…
This study used identified functional native domains from spider flagelliform silk protein and the Ca(2+) binding domain of lipase Lip A from Serratia marcescens . After carefully comparing the primary structures of both sequences, we rationally designed a newly sequenced eD(2) by "hiding" the ion binding sequence in…
Dense Pb(Sc 0.5 Ta 0.5 )O 3 (PST) ceramics were fabricated by a two‐step sintering technique. X‐ray diffraction analysis showed that the order of degree is 0.91 and micrograph indicated that the grain size is 1–3 μm. Under dc bias of 700 V/mm, the detective figure of merit reaches over 70 × 10 −5 Pa −1/2 , where the p…
Highly size-asymmetrical fluid mixtures arise in a variety of physical contexts, notably in suspensions of colloidal particles to which much smaller particles have been added in the form of polymers or nanoparticles. Conventional schemes for simulating models of such systems are hamstrung by the difficulty of relaxing…
The electronic structure of γ phase in the system Mg(17)Al(12) containing 58 atoms per unit cell with space group I43m has been calculated by using the WIEN2k-FLAPW program package. A pseudogap is found across the Fermi level. The FLAPW-Fourier spectra at the symmetry points N and Γ of the bcc Brillouin zone revealed…
Consider an arbitrarily polarised plane wave obliquely incident on a planar multilayer structure composed of a combination of natural materials and metamaterials, then the following three new theorems are proved in this paper. Theorem 1: Consider a planar multilayer structure made of a combination of common materials…
Abstract This work deals with a study of polymerization condition variables such as catalyst concentration, activator concentration, and initial polymerization temperature in the anionic polymerization of ε‐caprolactam. Ethylmagnesium bromide (EtMgBr) and sodium hydride (NaH) were used to make the catalyst composition…
The structures of the 3d divalent transition-metal diarsenates M(2)As(2)O(7) (M = Mn, Co, Ni, Zn) can be considered as variants of the monoclinic (C2/m) thortveitite [Sc(2)Si(2)O(7)] structure type with a ≃ 6.7, b ≃ 8.5, c ≃ 4.7 Å, α ≃ 90, β ≃ 102, γ ≃ 90° and Z = 2. Co(2)As(2)O(7) and Ni(2)As(2)O(7) are dimorphic. Th…