Materials Literature
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Field-emission patterns from a clean tungsten tip apex induced by femtosecond laser pulses have been investigated. Strongly asymmetric field-emission intensity distributions are observed depending on three parameters: (i) the polarization of the light, (ii) the azimuthal, and (iii) the polar orientation of the tip ape…
Three-dimensional (3D) self-assembled hierarchical bismuth oxide architectures were prepared via a solution precipitation synthesis at 85 degrees C in 45 min with the aid of polyethylene glycol-8000 (PEG-8000) as a capping agent. The morphology and crystalline phase evolution was studied versus reaction time and cappi…
The enzymatic activity of thioredoxin reductase enzymes is endowed by at least two redox centers: a flavin and a dithiol/disulfide CXXC motif. The interaction between thioredoxin reductase and thioredoxin is generally species-specific, but the molecular aspects related to this phenomenon remain elusive. Here, we inves…
We develop a method for calculating the equilibrium properties of the liquid-solid phase transition in a classical, ideal, multicomponent plasma. Our method is a semianalytic calculation that relies on extending the accurate fitting formulas available for the one-, two-, and three-component plasmas to the case of a pl…
Random poly(3-butylthiophene- co -3-octylthiophene) of several compositions were synthesized and found to be highly crystalline in spite of the statistical arrangement of the different-sized side chains. The melting ( T m ) and recrystallization ( T c ) temperatures of the random copolythiophenes varied continuously w…
Ultrafast magnetization dynamics triggered by femtosecond laser excitation of the FeRh alloy is investigated by time-resolved x-ray magnetic circular dichroism. We measure a gradual growth of magnetization within $\ensuremath{\approx}100\text{ }\text{ps}$ for both Fe and Rh elements as the system is laser-driven throu…
We use molecular dynamics simulations over microsecond time scales to study the micellization behavior of recently proposed continuum-space, coarse grained surfactant models. In particular, we focus on the MARTINI model by Marrink et al. [J. Phys. Chem. B 111, 7812 (2007)] and a model by Shinoda et al. [Soft Matter 4,…
Two [3]rotaxanes with an electron-rich pyrene moiety at the wheel and an electron-deficient naphthalenediimide (NDI) unit in the middle of the axle were prepared through "click chemistry", in which the intramolecular charge-transfer (ICT) process occurred between the pyrene moiety and the NDI unit, and the addition of…
The adsorption and separation of CH 3 OH/H 2 O and CO 2 /CH 4 in Zn(BDC)(TED) 0.5 (BDC = benzenedicarboxylate, TED = triethylenediamine) are investigated by integrating experiment and simulation. Zn(BDC)(TED) 0.5 is a highly hydrophobic metal−organic framework (MOF) with interlacing channels. The simulated isotherms o…
ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTPerchloric Acid and Its Salts: Very Powerful Catalysts in Organic Chemistry†Renato Dalpozzo*, Giuseppe Bartoli‡, Letizia Sambri‡, and Paolo Melchiorre‡View Author Information Department of Chemistry, Università della Calabria, Ponte Bucci cubo 12/c,I-87030 Arcavacata di Rende…
Applicability of the O-H...N heterosynthon for synthesis of a pharmaceutical co-crystal comprised of a commonly used tablet excipient methyl paraben and quinidine, an anti-malarial constituent of Cinchona tree bark, has been successfully demonstrated. Insights into local conformation and hydrogen-bonding were derived…
We report here the nonlinear rheological properties of metallo-supramolecular networks formed by the reversible cross-linking of semi-dilute unentangled solutions of poly(4-vinylpyridine) (PVP) in dimethyl sulfoxide (DMSO). The reversible cross-linkers are bis-Pd(II) or bis-Pt(II) complexes that coordinate to the pyri…
Here, we present a new DSSC design, consisting of sequential QDs and dye sensitization layers, that opens the path toward high optical density DSSCs that cover a significant part of the solar spectrum. The new configuration is enabled by the application of an amorphous TiO2 layer between the two sensitizers, allowing…
We present a systematic study of thermodynamics, structure, and rheology of mixtures of cationic wormlike micelles and like-charged nanoparticles. Structural and thermodynamic measurements in dilute surfactant-nanoparticle mixtures show the formation of micelle-nanoparticle junctions that act as physical cross-links b…
A TS-1 zeolite with a disordered network of mesopores penetrating the microporous crystalline zeolite framework was successfully synthesized by a one-pot carbon hard-templating synthesis approach. Besides conventional methods to characterize the mesoporosity, the use of variable-temperature 129 Xe NMR spectroscopy was…
Lithium orthosilicate (Li(4)SiO(4)) was synthesized by solid-state reaction and then its CO(2) chemisorption capacity was evaluated as a function of the CO(2) flow rate and particle size. Initially, a Li(4)SiO(4) sample, with a total surface area of 0.4 m(2)/g, was used to analyze the CO(2) chemisorption, varying the…
Dye-sensitized photovoltaic wires (DSPVWs) are developed using anodized Ti wires that contain ordered arrays of TiO2 nanotubes. The prototype DSPVW consists of N719 dye-adsorbed TiO2 nanotube arrays around a Ti wire as a working electrode, a platinum wire as a counter electrode, and an organic electrolyte encased in a…
OBJECTIVE: The facet joint has been identified as a significant source of morbidity in lower back pain. In general, treatments have focused on reducing the pain associated with facet joint osteoarthritis, and no treatments have targeted the development of a replacement tissue for arthritic facet articular cartilage. T…
Here we demonstrate the preparation and improved hydrogen monitoring properties based on p-NiO/n-SnO 2 heterojunction composite nanofibers via the electrospinning technique and calcination procedure. NiO/SnO 2 heterojuction composite nanofibers were spin-coated on the ceramic tube with a pair of Au electrodes for the…
We demonstrate three-dimensional plasmonic nanofocusing of light with patterned metallic pyramids obtained via template stripping. Gratings on the faces of these pyramids convert linearly polarized light into plasmons that propagate toward and converge at a approximately 10 nm apex. Experiments and computer simulation…