Materials Literature
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The electronic structure of α, γ, and β phases of MgH2 is studied using the state of the art all-electron projector-augmented-wave GW approximation. Both the ground-state and the high-pressure transformations are considered in this investigation. We have found an indirect (direct) band gap of 5.58eV (6.52eV) for α-MgH…
Effects of low-acceleration-voltage (20 kV) electron irradiation damage in single-walled carbon nanotubes (SWNTs) were studied by in-situ electric measurements. The irradiation drastically decreased the conductivity for both metallic and semiconducting nanotubes due to the irradiation-induced damage. Intensive electro…
Our investigation of diamondlike-carbon (DLC) nanosprings with a 130-nm spring section diameter, which were fabricated by focused-ion-beam chemical vapor deposition (FIB-CVD), showed for the first time that nanosprings can be stretched. We observed large displacements of the FIB-CVD nanosprings in situ optical microsc…
Macroscopically oriented bulk organic−inorganic hybrid materials were cast from solutions subjected to hydrodynamic flow by utilizing a simple flow device. The hybrids were prepared from an amphiphilic diblock copolymer, poly(isoprene- block -ethylene oxide) (PI- b -PEO), used as a structure directing agent for organi…
We developed an integrated circular polarizer based on stacking an aluminum nano-wire grid polarizer with a dielectric nano-grating-based quarter waveplate. The polarizer consists of 65 nm wide and 130 nm tall aluminum wires with a period of 148 nm. For integration, the aluminum nanowires were buried into a silicon di…
An objective and reliable evaluation method of fabric pilling using a three-dimensional scanning system with higher accuracy is presented. The overall fabric surface roughness together with the pilling characteristics were evaluated to comprehensively understand the fabric pilling phenomena and exactly grade the degre…
Abstract Summary: The complexation agents 2[‐bis‐(pyridylmethyl)aminomethyl]‐4‐methyl‐6‐formyl‐phenol (BPMAMFF) and 2‐[2‐(hydroxybenzyl)‐2‐(pyridylmethyl)aminomethyl]‐4‐methyl‐6‐formyl‐phenol (HBPAMFF) were immobilized on chitosan biopolymer in order to obtain new adsorbent materials for metal ions. The chitosan deriv…
The elastic response of a [001]-oriented and -poled ferroelectric rhombohedral lead zinc niobate-lead titanate single crystal close to the morphotropic phase region is examined under thermal, electrical, and mechanical boundaries similar to those used in sound projectors. Resonance measurements yielded a monotonically…
A three-dimensional (3D) Cu(II)-containing Prussian Blue analogue with two types of [Cr(CN) 6 ] 3- units, [Cu(2,2‘-dpa)] 3 [Cr(CN) 6 ] 2 ·3H 2 O (2,2‘-dpa = 2,2‘-dipicolylamine), was synthesized and characterized. One type of [Cr(CN) 6 ] 3- unit in this complex coordinates to six copper(II) atoms to form the heptanucl…
This paper proposes a simple method for predicting the magnetic losses of electrical steel sheets. By using this method, the losses under arbitrary induction waveform with or without minor loops from the loss data only under sinusoidal excitation can be estimated.
[reaction: see text] First examples of aromatic core-modified twisted heptapyrrolic systems with six meso links have been obtained via a general [3 + 4] acid-catalyzed condensation method. Despite the twisted conformation, these heptaphyrins exhibit aromaticity in solution, unlike most of the all-aza analogues.
Nitrilases are important industrial enzymes that convert nitriles into their corresponding acids or, occasionally, amides. Atomic resolution structures of four members of the nitrilase superfamily have been determined, but these differ from microbial nitrilases in that they do not form typical large homo-oligomeric co…
The anticalin FluA is an artificial lipocalin with novelspecificity for the fluorescein group, which was engineered from an insect bilin-binding protein by targeted random mutagenesis and selection. Based on the crystal structure of FluA, an attempt was made to improve the complementarity of its ligand pocket to fluor…
Progress in the development of actuating molecular devices based on responsive polymers is reviewed. The synthesis and characterization of “grafted from” brushes and triblock copolymers is reported. The responsive nature of polyelectrolyte brushes, grown by surface initiated atomic transfer radical polymerization (ATR…
A novel thermosensitive macromolecular prodrug of 5-fluorouracil (5-FU) was synthesized using cyclotriphosphazene, and its thermosensitivity, degradability, and in vitro antitumor activity were studied. A series of alpha-substituted glycine derivatives of 5-FU containing carboxylic groups were prepared, and cyclotriph…
The effects of lattice vibration on Cu nucleation in Fe-Cu alloys have been investigated by a first-principles technique. We find that the vibrational effect is comparable $(\ensuremath{\sim}36%)$ to the configurational entropy. Lattice vibration increases the activation barrier of Cu precipitates by 0.53 eV, where th…
Abstract An encapsulation of silver nanoparticles has been developed based on a template technique. Amphiphilic double‐cylinder‐type copolymer brushes were employed as a single molecule template, utilizing the coordination of Ag + ions with carboxylate groups in the core of the brush. Subsequently, silver nanoparticle…
This article focuses on gaining a fundamental understanding of the bubble growth and collapse phenomena in a chemical blowing agent (CBA)based foaming process under atmospheric pressure. The behavior of CBA-blown bubbles exposed to various processing conditions is observed using a hot-stage optical microscope-based im…
Abstract The polymerization conditions for polystyrene and poly(methyl methacrylate) crosslinked by 0.5 mol % of the cluster Zr 6 O 4 (OH) 4 (methacrylate) 12 were optimized by applying a step polymerization procedure. The onset of thermal decomposition was thus increased up to about 50° for polystyrene and about 110°…
This work is concerned with the effect of the nanostructure on the electrical conductivity of n-type In-doped PbTe thin films. Nanostructured thin films were prepared by varying the rate of nucleation as a function of the nature and temperature of the substrates. On low-temperature substrates, the increased rate of nu…