Zwitterionic phosphorylcholine as a better ligand for stabilizing large biocompatible gold nanoparticles
Zwitterionic phosphorylcholine showed better stabilization than oligo(ethylene glycol) in protecting big gold nanoparticles.
Materials Literature
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Role of defect chemistry in the properties of perovskite manganites
This Feature Article provides some representative examples of the role of defect chemistry in the properties of perovskite manganites. It will be shown that a precise control of their defect chemistry is essential in order to give a reliable and meaningful correlation between physical properties and composition.
Preferred functionalization of metallic and small-diameter single walled carbon nanotubes via reductive alkylation
A selectivity investigation of the covalent sidewall functionalization of SWNTs by reductive alkylation (Billups reaction) is reported. The functionalized tubes Rn-SWNT were characterized by UV-vis-nIR absorption, nIR emission and Raman spectroscopy. The reduction of SWNTs with sodium and the subsequent alkylation of…
Tunable red–green–blue fluorescent organogels on the basis of intermolecular energy transfer
One or two-component gels with tunable emission colours were obtained from the assembly of three red–green–blue fluorescent molecules. The intermolecular energy transfer between these molecules played a crucial role in providing the tunable colour by a single excitation wavelength of 365 nm in the mixed gels. These ge…
Thermal activation of ferroelectric switching
By applying the theory of thermally activated nucleation to the switching of ferroelectric domains, a method is developed to experimentally obtain the value of both the activation enthalpy, ΔH, and activation volume, V*, for the thermally activated process involved in ferroelectric switching. The method was applied to…
Accelerating charge transfer in a triphenylamine–subphthalocyanine donor–acceptor system
We have designed, synthesized and probed a dodecafluoro-subphthalocyaninato boron(III) unit, which bears a triphenylamine moiety in its axial position, as a novel electron donor-acceptor system.
Electrospun gelatin/poly(L-lactide-co-ε-caprolactone) nanofibers for mechanically functional tissue-engineering scaffolds
Recently, much attention has been given to the fabrication of tissue-engineering scaffolds with nano-scaled structure to stimulate cell adhesion and proliferation in a microenvironment similar to the natural extracellular matrix milieu. In the present study, blends of gelatin and poly(L-lactide-co-epsilon-caprolactone…
Investigation of Cathode Behavior of Model Thin-Film SrTi[sub 1−x]Fe[sub x]O[sub 3−δ] (x=0.35 and 0.5) Mixed Ionic-Electronic Conducting Electrodes
(STF) model cathodes, with compositions and 0.5, prepared as dense films with a well-defined area and thickness on top of a single-crystal yttria stabilized zirconia substrate by pulsed layer deposition at were investigated by electrochemical impedance spectroscopy as a function of electrode geometry, temperature, and…
One-pot synthesized MoC imbedded in ordered mesoporous carbon as a catalyst for N2H4 decomposition
Nanosized and highly dispersed molybdenum carbide was fabricated in the carbon walls, along with the formation of ordered mesoporous carbons, via a one-pot organic-organic cooperative self-assembly approach.
Analysis of a force-based quasicontinuum approximation
We analyze a force-based quasicontinuum approximation to a one-dimensional system of atoms that interact by a classical atomistic potential. This force-based quasicontinuum approximation can be derived as the modification of an energy-based quasicontinuum approximation by the addition of nonconservative forces to corr…
Phase-field modeling of microstructure evolutions in magnetic materials
Recently, the phase-field method has been extended and utilized across many fields of materials science. Since this method can incorporate, systematically, the effect of the coherency induced by lattice mismatch and the applied stress as well as the external electrical and magnetic fields, it has been applied to many…
Bio-inspired synthetic pathways and beyond: integrative chemistry
Herein are described some rational synthetic pathways for generating complex architectures with enhanced application in either optics, catalysis, phase separation or magnetism. The ability of integrative chemistry to scissor condensed matter at several length scales where final objects will be macroscopically one-dime…
Quantifying the fraction of glycine and alanine in β-sheet and helical conformations in spider dragline silk using solid-state NMR
Solid-state two-dimensional refocused INADEQUATE MAS NMR experiments resolve distinct helical and beta-sheet conformational environments for both alanine and glycine in Nephila clavipes dragline silk fibers; the fraction of alanine and glycine in beta-sheet structures is determined to be 82% +/- 4% and 28% +/- 5%, res…
Bent-core liquid crystal (LC) decorated gold nanoclusters: synthesis, self-assembly, and effects in mixtures with bent-core LC hosts
We present the first synthesis of a series of thiol-, thioacetate-, and xanthate-terminated bent-core derivatives, as well as the preparation of gold nanoclusters using the thiol-terminated bent-core compounds. The mesomorphic properties of the bent-core compounds have been investigated by polarizing optical microscop…
Sub-picosecond time resolved infrared spectroscopy of high-spin state formation in Fe(ii) spin crossover complexes
The photoinduced low-spin (S = 0) to high-spin (S = 2) transition of the iron(ii) spin-crossover systems [Fe(btpa)](PF(6))(2) and [Fe(b(bdpa))](PF(6))(2) in solution have been studied for the first time by means of ultrafast transient infrared spectroscopy at room temperature. Negative and positive infrared difference…
Recent Approaches to Highly Hydrophobic Textile Surfaces
A super-hydrophobic character is increasingly required for high-performance technical textiles in order to attain effective liquid repellence, self-cleaning, uni-directional liquid transport, or to create barrier coatings on fiber surfaces. Accordingly, numerous novel approaches to decrease the surface free energy of…
Evaluation of Delayed Fracture Characteristics of High Strength Steel based on CSRT Method
A conventional strain rate technique (CSRT) to evaluate the delayed fracture characteristics of high strength steels has been proposed. The critical “maximum stress—diffusible hydrogen concentration” at the delayed fracture initiation point near the notch tip is thought to be a material constant, which was originally…
Low toxic, thermoresponsive dendrimers based on oligoethylene glycols with sharp and fully reversible phase transitions
Novel first (G1) and second (G2) generation dendrimers based on three-fold branched oligoethylene glycol dendrons are efficiently synthesized which show characteristic thermoresponsive behavior and negligible cytotoxicity (for G2).
Sonication-assisted supramolecular nanorods of meso-diaryl-substituted porphyrins
Supramolecular nanorods of 5,15-diaryl-substituted porphyrins prepared by sonication method exhibit a broad absorption property, which is confirmed by photocurrent generation measurement in a photoelectrochemical cell.
Texture and Stretch Formability of Mg-1.5 mass%Zn-0.2 mass%Ce Alloy Rolled at Different Rolling Temperatures
Texture and stretch formability of Mg-1.5 mass%Zn-0.2 mass%Ce alloy rolled at different rolling temperatures were investigated. The Mg-Zn-Ce alloy rolled at 723 K and annealed at 623 K tended to produce a TD-split texture. The TD-split texture contributed to the low average r-value and high tensile elongation, resulti…