Materials Literature
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Block copolymer thin films can be used as soft templates for a wide range of surfaces where large area patterns of nanoscale features are desired. The cylindrical domains of acid-sensitive, self-assembled monolayers of polystyrene-poly(2-vinylpyridine) block copolymers on silicon surfaces were utilized as structural e…
Hemicelluloses as matrix substances showed an important role in nanofibrillation of wood pulp. Never-dried and once-dried pulps with different amounts of hemicelluloses were fibrillated using a grinding treatment. The degree of fibrillation was evaluated by scanning electron microscopy observation of the fibrillated p…
Mg films containing Fe–Zr mixed additives were prepared by rf sputtering and their hydrogen sorption kinetic was studied by Sievert technique. We observed that mixed Fe–Zr additives improve the H2 desorption kinetics better than singly Fe or Zr. X-ray diffraction analysis evidences that mixed additives optimize the Fe…
The self-assembly of a diblock copolymer melt in a confined regular geometry with a given pore size is studied using self-consistent field theory. For a particle in a polymer domain, we obtain the interaction potential as a function of the distance from the polymer interface. For a given concentration of particles of…
A one-pot aqueous chemical synthesis for silica-passivated ferromagnetic nanoparticles is presented. The average size of these particles is 84 ± 20 nm. The x-ray and electron diffraction experiments revealed that the nanoparticles are mainly composed of polycrystalline iron boride. The broad x-ray diffraction peak lea…
Abstract Based upon the Slater–Koster tight‐binding model and the gradient approximation, we investigate the linear optical properties of radially deformed single‐walled carbon nanotubes (SWNTs). It is found that, for the armchair tubes, the radial pressure may make the absorption peaks exhibited in the perfect tube s…
Abstract The objective of this work was to determine the parameters that affect the mass transport and the distribution of species in microcapillaries close to the specimen surface. Local experiments were carried out under static and flow conditions on type 316L stainless steel in 1.7 M NaCl, pH = 3, by means of the e…
Abstract A study was conducted on the curing process of a nanocomposite consisting of a trifunctional epoxy resin, a hardener containing reactive primary amine groups, and montmorillonite (MMT) nanoparticles, previously treated with octadecyl ammonium. Three levels of MMT content were used: 2, 5, and 10%. The curing w…
Recently, the overproduction of Mycobacterium tuberculosis diaminopimelic acid (DAP) epimerase MtDapF in Escherichia coli using a novel codon alteration cloning strategy and the characterization of the purified enzyme was reported. In the present study, the effect of sulphydryl alkylating agents on the in vitro activi…
We propose a research field “mechanics of liquid crystals,” in which liquid crystals are studied from a mechanical viewpoint. The unsteady behaviors of a liquid crystal between parallel plates under an electric field are investigated. The imposition of the electric field on the liquid crystal induces flows, whose prof…
Aluminum titanate (Al 2 TiO 5 ) is an excellent refractory and thermal shock resistant material due to its relatively low‐thermal expansion coefficient and high melting point. However, Al 2 TiO 5 is only thermodynamically stable above 1280°C and undergoes a eutectoid decomposition to α‐Al 2 O 3 and TiO 2 (rutile) in t…
Abstract This study describes the preparation of a nanocomposites fabricated from monodispersed 4‐nm iron oxide (Fe 3 O 4 ) coated on the surface of carboxylic acid containing multi‐walled carbon nanotube (c‐MWCNT) and polypyrrole (PPy) by in situ chemical oxidative polymerization. High‐resolution transmission electro…
We have successfully developed a process to form high quality MgF(2) thin films with ultralow refractive indices from autoclaved sols prepared from magnesium acetate and hydrofluoric acid. And we have confirmed that our porous MgF(2) coatings have not only high transmittance in the UV region but also high uniformity o…
Welcome to the first issue of PhysMath Central (PMC) Physics B, a new peer-reviewed international Open Access journal covering condensed matter physics and atomic and molecular phys-
We have elaborately investigated heavily doped ${\mathrm{Nd}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}\mathrm{Mn}{\mathrm{O}}_{3}$ with $x=0.57--0.75$. $3{z}^{2}\ensuremath{-}{r}^{2}$ and ${x}^{2}\ensuremath{-}{y}^{2}$ orbital orders strongly compete with each other at $x=0.625$. The competition causes spatial orbital fluc…
The Cu‐modified (Na 0.5 K 0.5 ) 0.96 Li 0.04 Ta 0.1 Nb 0.9 O 3 lead‐free piezoelectric ceramics were fabricated at relatively low temperatures by ordinary sintering. The results indicate that the addition of copper oxide (CuO) does not change the crystal structure and the dielectric–temperature characteristic, but ten…
Dense BaTi2O5 ceramics with KF doping up to 5at.% were synthesized by spark plasma sintering (SPS). The SPS method enabled us to overcome the densifying difficulty in conventional sintering which is caused by the limit of the decomposing temperature of this metastable phase. We observed drastic KF-doping effect on the…
A single cell gap and wide-view transflective liquid crystal display (TR-LCD) using fringe field switching and embedded wire grid polarizer as polarization dependent reflector is developed. Such a device structure does not require any quarter-wave plate or in-cell phase retarder. Through optimizing the pixel electrode…
Rock-salt structured single-phase Ni0.98Fe0.02O and Ni0.93Fe0.02Li0.05O thin films with room temperature ferromagnetism were grown by pulsed laser deposition. It is found that the Li codoping into Ni0.98Fe0.02O significantly increases the saturation magnetic moment by a factor of 2, i.e., from 0.32μB∕Fe rising to 0.67…
Field‐assisted sintering exposes samples in a graphite die to reducing conditions. Using TiO 2 as a test case, this work shows that internal redox equlibria in the sample, rather than the graphite–CO–O 2 equilibrium, appear to control the oxygen fugacity. Samples sintered at 1160°C for 20 min are homogeneous in oxygen…