Materials Literature
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In the nanoscale assembly-based design of antithrombotic agents, poly-α,β-DL-aspartyl-L-arginine (MW: 20 741) was prepared from the thermal polycondensation of DL-aspartic acid and the amidation of polysuccimide with L-arginine. In the pH environments corresponding to the stomach (pH 1.2), intestinal tract (pH 7.6), b…
Abstract Reanalysis of the 197Au Mössbauer spectrum of Au25(SG)18− (SG: glutathionate) based on the structure determined by single-crystal XRD analysis gave a reasonable fit, demonstrating that 197Au Mössbauer spectroscopy is a powerful tool for predicting the structural motifs of thiolate-protected Au clusters.
Abstract Violet light‐emitting diode (LED) structures based on Cd‐alloyed zinc oxide (Zn 1− x Cd x O) nanorods (NRs)/p‐GaN heterojunction have been fabricated by epitaxial electrodeposition at low temperatures in an aqueous soft bath followed by a mild thermal annealing. The ultraviolet (UV) room‐temperature emission…
Abstract A new simple method was developed to fabricate porous polylactic acid (PLA) films coated directly on substrates. The PLA films with a controllable thickness were realized using a dip‐coating technique. The pore structure of the resulting porous PLA films was tailored by utilizing phase inversion process and t…
Abstract Crosslinked polyacrylonitrile (PAN) was synthesized with divinylbenzene as the crosslinker with an iron(III)‐mediated atom transfer radical polymerization method with activators regenerated by electron transfer. The polymerization exhibited first‐order kinetics with respect to the polymerization time. Hydroxy…
The authors have demonstrated large-area suspended graphene on GaN nanopillars predefined by nanosphere lithography and inductively coupled plasma etching. The graphene was successfully suspended over large areas without ripples and corrugations. Scanning electron microscopy, atomic force microscopy and micro-Raman sp…
The unsymmetrical distribution of the unpaired electron in the ground state of the DBTTFI(•-) radical anion (bi(6-n-butyl-5,7-dioxo-6,7-dihydro-5H-[1,3]dithiolo[4,5-f]isoindole-2-ylidene) is theoretically predicted using the M06-2X/6-31+G(d,p) level of calculations. The results are additionally confirmed by single poi…
Abstract Conductive fillers are often added to thermoplastic polymers to increase the resulting composite's electrical conductivity (EC) which would enable them to be used in electrostatic dissipative and semiconductive applications. The resulting composite also exhibits increased tensile modulus. The filler aspect ra…
BaO x (0.5 MLE - 10 MLE)/Pt(111) (MLE: monolayer equivalent) surfaces were synthesized as model NO x storage reduction (NSR) catalysts. Chemical structure, surface morphology, and the nature of the adsorbed species on BaO x /Pt(111) surfaces were studied via X-ray photoelectron spectroscopy (XPS), temperature-programm…
We investigated the equilibrium properties of a one-dimensional system of classical particles which interact in pairs through a bounded repulsive potential with a Gaussian shape. Notwithstanding the absence of a proper fluid–solid phase transition, we found that the system exhibits a complex behaviour, with ‘anomalies…
A structural phase transition from monoclinic C2/c to triclinic P symmetry has been found by X-ray diffraction in a number of single crystals of the known family of organic metals and superconductors β′′-(BEDT-TTF)4H3O[Fe(C2O4)3]·G where G stands for halogenated benzene derivatives and their mixtures with benzonitrile…
This letter demonstrates, for the first time, enhancement-mode (e-mode) antimonide MOSFETs by integrating a composite high-κ gate stack (3 nm Al2O3-1 nm GaSb) with an ultrathin InAs0.7Sb0.3quantum well (7.5 nm). The MOSFET exhibits record high electron drift mobility of 5200 cm2/V · s at carrier density (Ns) of 1.8 ×…
PURPOSE: To develop safe and effective manganese(II) -based biodegradable macromolecular MRI contrast agents. MATERIALS AND METHODS: In this study, we synthesized and characterized two polydisulfide manganese(II) complexes, Mn-DTPA cystamine copolymers and Mn-EDTA cystamine copolymers, as new biodegradable macromolecu…
Perovskite-type LaFe 1− x Ni x O 3 in the composition range with orthorhombic crystal structure ( x = 0.0, 0.1, 0.3 and 0.5) was prepared by the standard solid-state reaction method. The phase formation was checked by synchrotron x-ray diffraction. The structure was refined from the collected x-ray diffraction data us…
Abstract This article dealt with the relationship between mechanical properties and crosslinked networks of natural rubber (NR) reinforced by zinc dimethacrylate (ZDMA) after thermal aging. After thermal aging at the present experimental conditions, the covalent crosslink density showed a decrease all the time, wherea…
The formation of an identical linear tetrapyrrole observed in the course of photooxidation of meso-tetraarylporphyrin and its N-confused isomer can be explained as a result of 1,2- and 1,3-dioxygen addition, respectively, as substantiated by DFT calculations.
An experimental study was carried out to determine the effects of the selected sewing parameters in denim fabric on seam strength, and the results were analyzed statistically and graphically. Subsequently, a regression analysis was performed on data obtained in the experiments in order to create equipments to predict…
The transition metal rhodium has been proved the effective catalyst to convert from NO(x) to N(2.) In the present work, we are mainly focused on the NO adsorption and decomposition reaction mechanism on the surface of the Rh(7)(+) cluster, and the calculated results suggest that the reaction can proceed via three step…
As a promising hydrogen storage material, ammonia borane was investigated at simultaneous high pressures (up to 15 GPa) in a diamond anvil cell and at low temperatures (down to 80 K) using a cryostat by in situ Raman spectroscopy. When ammonia borane was cooled from room temperature to 220 K at near ambient pressure,…
The iron coordination chemistry of some polytopic hydrazone based ligands is examined. The complexes derive from a general self-assembly strategy, where ligand design can be used to devise specific polymetallic [n × n] grid architectures. However, as part of any complex equilibrium process, oligomeric entities can als…