Materials Literature
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A thermoresponsive crown ether/amine-type rotaxane switch worked under solvent-free condition was developed. The wheel component moved to switch the local position on the axle by the solid-state acid–base reaction between tert-amine moiety of the rotaxane and trichloroacetic acid. The wheel shuttling on the axle proce…
Alkyl- and alkoxy-substituted p -phenylene–butadiynylene tetramers, obtained via a stepwise synthesis, are polymerized under Glaser coupling conditions. The fractionation of the oligomers by recycling gel permeation chromatography (recGPC) yields three sets of monodisperse oligo( p -phenylene–butadiynylene)s (OPBs) wi…
Small-molecule thiols, such as cysteine (CYS) and glutathione (GSH), are essential for maintaining the cellular redox environment and play important roles in regulating various cellular physiological functions. A fluorescence probe (compound 1-Cu2+) for thiols based on coumarin carbohydrazide dinuclear copper complex…
We present an experimental study of the double-quantum-well (DQW) system made of two-dimensional layers with inverted energy band spectrum: HgTe. The magnetotransport reveals a considerably larger overlap of the conduction and valence subbands than in known HgTe single quantum wells (QW), which may be regulated here b…
The tube model is the cornerstone of molecular theory for polymer rheology. We test its microscopic assumptions by simulating topologically equilibrated ring polymers, whose dynamics is free from end segment relaxation. We show that a closed-form expression derived from the tube model adapted to ring polymers quantita…
The long-term stability of magnetic particulate tapes (Linear Tape Open (LTO) and a more modern barium ferrite data cartridge tape) was investigated using samples that had been stored under an accelerated condition for one year. Analysis by a vibrating sample magnetometer, surface roughness analyzer, and friction test…
The JT-60SA superconducting tokamak is being constructed in Japan under the Broader Approach agreement between Japan and the EU. ENEA is responsible for the in-kind supply of 18 toroidal field coil casings for JT-60SA, and contracted the company Walter Tosto (Chieti, Italy) for fabrication of two sets of nine casings…
We report specific heat measurements on a high-quality single crystal of the heavy-fermion compound ${\mathrm{CePt}}_{2}{\mathrm{In}}_{7}$ in magnetic fields up to 27 T. The zero-field specific heat data above the N\'eel temperature, ${T}_{N}$, suggest a moderately enhanced value of the electronic specific heat coeffi…
PURPOSE: MRI contrast agents (CA) whose contrast enhancement remains relatively high even at the higher end of the magnetic field strength range would be desirable. The purpose of this work was to demonstrate such a desired magnetic field dependency of the longitudinal relaxivity for an experimental MRI CA, Gd(ABE-DTT…
In the present work, the dielectric response of III-nitride semiconductors is studied using density functional theory (DFT) band structure calculations. The aim of this study is to improve our understanding of the features in the low-loss electron energy-loss spectra of ternary alloys, but the results are also relevan…
We report on the validity of using a C‐doped GaN buffer to achieve high‐breakdown‐voltage AlGaN/GaN high‐electron mobility transistors (HEMTs) on conductive free‐standing GaN substrates. We use trimethygallium to dope C into the buffer. We show that breakdown voltage depends not only on the C concentration of the buff…
Several studies have highlighted the leading role of the sequence periodicity of polar and nonpolar amino acids (binary patterns) in the formation of regular secondary structures (RSS). However, these were based on the analysis of only a few simple cases, with no direct mean to correlate binary patterns with the limit…
The noncovalent halogen···halogen (X···X) interaction, which shows significant anisotropic feature, is extensively used in rationally designing supramolecular assemblies. Here, beyond the binding energy of stable geometries, the anisotropic topology of the potential energy surface (PES) is explored. We show that most…
Alternative materials are being investigated as substitution of the traditional copper rotating band, in order to solve problems associated with their mechanical and physical properties. Meanwhile, new processes for joining the rotating band on the projectile body have also to be developed because of different materia…
Development of novel polymeric materials capable of efficient CO 2 capture and separation under ambient conditions is crucial for cost-effective and practical industrial applications. Here we report the facile synthesis of a new CO 2 -responsive polymer through postpolymerization modification of poly(2-vinyl-4,4-dimet…
The retrieval of phases from intensity measurements is a key process in many fields in science, from optical microscopy to x-ray crystallography. Here we study phase retrieval of a one-dimensional multi-phase object that is illuminated by quantum states of light. We generalize the iterative Gerchberg-Saxton algorithm…
To understand and predict the microstructure evolution in various grades of steel, a heat transfer coupled with phase transformation model has been formulated with an enhanced stelmor cooling module. This module is capable of handling both blower assisted high cooling and retarded cooling using hoods. The stelmor modu…
The complexing ability of copper(II) in solution by the ligand N,N'-2,6-pyridinebis(oxamic acid) (H4mpyba, H4L) was determined through potentiometric and UV-vis spectroscopy at 25 °C and 0.15 M NaCl. The logarithms of the equilibrium constants for its copper(II) complexes according to the eqs 2H2L + 2Cu ⇆ [Cu2(H2L)2],…
We study resonant translational, breathing, and twisting modes of transverse magnetic domain walls pinned at notches in ferromagnetic nanostrips. We demonstrate that a mode's sensitivity to notches depends strongly on the mode's characteristics. For example, the frequencies of modes that involve lateral motion of the…
Ever decreasing of microelectronics devices is challenged by overheating and demands an increase in heat removal rate. Herein, we fabricated highly efficient heat-removal coatings comprised of copper oxide-plated polymer nanofiber layers (thorny devil nanofibers) with high surface-to-volume ratio, which facilitate hea…