Materials Literature
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Powder neutron-diffraction measurements on both SmFeAsO and the fluorine-doped superconductor, ${\text{SmFeAsO}}_{0.85}{\text{F}}_{0.15}$, show that the Sm sublattice orders magnetically. In both cases we observe a simple layered antiferromagnetic arrangement of the $\ensuremath{\sim}0.5{\ensuremath{\mu}}_{B}$ Sm mome…
Abstract Non‐covalent interactions are increasingly used in the molecular self‐assembly of well‐defined structures. In this study, a series of pyridine‐containing polyurethanes (PUPys) were synthesized with diisocyanates and pyridine derivatives. Fourier transform infrared spectroscopy was employed to identify the vib…
We report on the electric-field- and H chemical-absorption-induced band manipulations of armchair ZnO nanoribbons using first-principles calculations. It is shown that the band gap of a semiconducting armchair nanoribbon can be reduced monotonically with increasing transverse field strength, demonstrating a giant Star…
Abstract This article reports a study on the spinnability of three different ester type thermoplastic polyurethanes (TPUs) with shore hardness 75A, 85A, 92A using the dry‐jet‐wet spinning method. The three grades have been analyzed by FTIR, GPC, and 1 H‐NMR to establish the difference among them. FTIR indicated that a…
In recent years, a number of routes to porous materials have been developed which do not involve the use of pre-formed templates or structure-directing agents. These routes are usually spontaneous, meaning they are thermodynamically downhill. Kinetic control, deriving from slow diffusion of certain species in the soli…
An A-D-A triad compound comprising a tetrathiafulvalene (TTF) moiety and two pyridyl groups, py-TTF-py (1), has been studied in view of intramolecular charge transfer (ICT). The compound shows a sharp and multicolor change in different solvents and at different pH values, exhibiting good solvatochromism. The results o…
The transmission coefficients (TCs) and angularly averaged conductance for quasi-particle transport are studied for a bilayer graphene superlattice arranged according to the Fibonacci sequence. The transmission is found to be symmetric around the superlattice growth direction and highly sensitive to the direction of t…
By carefully comparing ABA triblock copolymers with che-mically matched AB diblock copolymers, Khanna et al.1 have recently shown that molecular architecture affects the surface energy of an ordered block copolymer melt. In particular, their experiment revealed a greater tendency for the B-rich domains of the diblock…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTStrain-Induced Enthalpy Relaxation in Poly(lactic acid)Sang Cheol Lee*, Jae Il Han, Young Gyu Jeong, and Mirinae KwonView Author Information School of Advanced Materials and System Engineering, Kumoh National Institute of Technology…
Using an artificial peptide library, we have identified a peptide with affinity for ZnO materials that could be used to selectively accumulate ZnO particles on polypropylene-gold plates. In this study, we fused recombinant green fluorescent protein (GFP) with this ZnO-binding peptide (ZnOBP) and then selectively immob…
The Curie point T c of ferroelectrics sets the upper temperature limit for their application as piezoelectrics. Some Aurivillius phase and perovskite-like layer structured (PLS) materials are good candidates for high temperature piezoelectric applications because of their high T c. The Aurivillius phase CaBi2Nb2O9 and…
Abstract Favorable positive temperature coefficient (PTC) properties of multiwall carbon nanotubes (MWCNT)/poly(vinylidene fluoride) (PVDF) nanocomposites were obtained. The results showed that such composites presented high PTC intensity, as well as eliminated negative temperature coefficient effect and high thermal…
In this article, we developed an effective approach to generate gold nanoflowers (AuNFs) by vesicles made from a series of gemini amphiphiles (G2-G10) with different spacer lengths. The gemini amphiphiles were found to form vesicles in aqueous solution. Upon mixing with vesicles in the presence of AgNO(3), HAuCl(4) co…
β-Ga 2 O 3 hexagonal nanodisks were in situ grown on the surface of gallium grain and Si substrate via a reaction of metallic gallium with NH 4 Cl and H 2 O at 650−800 °C for 30 min. The as-synthesized nanodisks have perfect hexagonal shape with diagonals of 0.6−4.0 μm and thicknesses of 140−480 nm. Size of the hexago…
We report on the protein-resistant properties of glass substrates coated with novel copolymers of 2-aminoethyl methacrylate hydrochloride and poly(ethylene glycol) methyl ether methacrylate (AEM-PEG). In comparison to currently available protein-blocking polymer systems, such as poly-l-lysine-poly(ethylene glycol), si…
Abstract Silica nanoparticles and poly(butylene succinate) (PBS) nanocomposites were prepared by a melt‐blending process. The influence of silica nanoparticles on the nonisothermal crystallization behavior, crystal structure, and mechanical properties of the PBS/silica nanocomposites was investigated. The crystallizat…
Ice rheology, the integrity of polar ice core records, and ice−atmosphere interactions are among the phenomena controlled by the morphology and composition of interstitial fluids threading polycrystalline ice. Herein, we investigate how ionic impurities affect such features via time-resolved confocal fluorescence micr…
We report the resistivity measurements under pressure of two Fe-based superconductors with a thick perovskite oxide layer, Sr2VFeAsO3 and Sr2ScFePO3. The superconducting transition temperature Tc of Sr2VFeAsO3 markedly increases with increasing pressure. Its onset value, which was Tc{onset}=36.4 K at ambient pressure,…
The elasto-plastic torsional response of a thin metal wire is analysed using the phenomenological flow theory of strain-gradient plasticity proposed by Fleck and Willis (2009 Part I J. Mech. Phys. Solids 57 161, 2009 Part II J. Mech. Phys. Solids 57 1045). Numerical results are obtained via minimum principles, and clo…
Recently it was discovered that the jump in the specific heat at the superconducting transition in pnictide superconductors is proportional to the superconducting transition temperature to the third power, with the superconducting transition temperature varying from 2 to 25 K including underdoped and overdoped cases.…