Materials Literature
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Agricultural and industrial pollution release large amounts of heavy metals into the atmosphere, surface water, soil, and plants. The protection and restoration of soils and water contaminated with heavy metals generate a great need to develop efficient adsorbents for these pollutants. This study reports the adsorptio…
Composites of Sr-doped (LSM) and yttria-stabilized zirconia (YSZ) were prepared by infiltration of LSM nanoparticles, of aqueous salt solutions, and of molten salts into porous YSZ and tested as solid oxide fuel cell (SOFC) cathodes at . All of the composites showed essentially identical performance, with a current-in…
One-dimensional composite nanofibres with narrow dispersity, high aspect ratio and high processibility have been fabricated by head-to-tail self-assembly of rod-like tobacco mosaic virus assisted by aniline polymerization, which can promote many potential applications including electronics, optics, sensing and biomedi…
The diamagnetic complex [Re(CN)8]3- is shown to react with Mn2+ ions in methanol to generate the centered, face-capped octahedral cluster (CH3OH)24Mn9Re6(CN)48, which is structurally analogous to (CH3OH)24Mn9Mo6(CN)48. Related reactions involving stoichiometric mixtures of octacyanometalate complexes generate the subs…
A significant result from research on the influence of hydrostatic pressure on the dielectric properties of compositionally disordered ABO3 perovskites has been the discovery of a pressure-induced ferroelectric(FE)-to-relaxor (R) crossover making the R state, the ground state, of these materials at reduced volume. Thi…
This communication reports the first example of cyclic ferric clusters with an odd number of iron atoms capped by phosphonate ligands, namely, [Fe9(mu-OH)(7)(mu-O)2(O3PC6H9)8(py)12]. The magnetic studies support a S = 1/2 ground state with an exchange coupling constant of about J approximately equal to -30 K.
Preface. List of contributors. 1. Stimuli-Responsive Brushlike Macromoleculas. 2. Design of Responsive Water-Soluble Block Copolymers. 3. Azobenzene-Containing Photoswitchable Polymeric Langmuir-Blodgett-Kuhn Multilayer Films. 4. Stimuli-Responsive Semifluorinated Polymer Brushes. 5. Nanopatterning of Stimulus-Respons…
Molecular memory devices based on dithienylethene switch modified ITO electrodes undergo reversible ring opening/closing both photo- and electro-chemically with non-destructive electrochemical readout.
Pores in single‐crystalline semiconductors can be produced in a wide range of geometries and morphologies, including the “nanometer” regime. Porous semiconductors may have properties completely different from the bulk, and metamaterials with, for example, optical properties not encountered in natural materials are eme…
A time-accurate transient model of an anode-supported solid-oxide-fuel-cell ͑SOFC͒ membrane-electrode assembly ͑MEA͒ is developed and used as the basis for simulating electrochemical impedance spectra ͑EIS͒.The one-dimensional model includes porous-media transport, elementary heterogeneous chemical reaction, ion condu…
This work demonstrates the potential of sonochemistry to become a most valuable tool for nanotechnology if the underlying complex processes are understood and controlled. It is shown that control of cavitation requires controlling of interfaces at the microsec time scale and thus a diversity of phenomena are observed…
The formation of the two dimeric species [(TTF)2]+* and (TTF+*)2 can be monitored by complexation of Na+ on a calix[4]arene-TTF assembly.
Gd-doped ceria (GDC)-impregnated ( La 0.75 Sr 0.25 ) ( Cr 0.5 Mn 0.5 ) O 3 (LSCM) is investigated as an alternative Ni-free anode for the direct utilization of methane in solid oxide fuel cells. Impregnation of submicrometer and ionic conducting GDC greatly improves the electrocatalytic activity of the LSCM anodes for…
Abstract Carbon nanotubes consisting of a rolled graphene layer built from sp 2 units have attracted the imagination of scientists as 1D macromolecules. Here, we will describe the recent progress on selective synthesis of various carbon nanotubes through the judicious control of synthetic conditions and their practica…
A wet-chemical method to produce zinc oxide nanocrystals of monodisperse size distribution (diameter range of 20–80 nm) is presented. The synthesis starts from zinc acetate dihydrate which is converted to ZnO in the presence of 1-pentanol in m-xylene at 130 °C. We report for the first time catalysis of this reaction b…
We introduce a family of spherically symmetric gradient-index lenses forming a perfect (sharp) image of any point of the space in three dimensions, including the points of a homogeneous (constant refractive index) region. The only previously known example of an optical instrument with such properties is the plane mirr…
Conductive oxide coatings are used to improve electrical performance and surface stability of metallic interconnects, as well as to mitigate or prevent chromium poisoning in solid oxide fuel cells (SOFCs). To further understand materials suitability and shed light on mass transport, two conductive perovskites, La 0.8…
Coherent population trapping at zero magnetic field was observed for nitrogen-vacancy centers in diamond under optical excitation. This was measured as a reduction in photoluminescence when the detuning between two excitation lasers matched the 2.88 GHz crystal-field splitting of the color center ground states. This b…
Many barriers to drug delivery into a tumor site require careful consideration when designing a new drug. In this study, the adhesive targeting and drug specificity of modified liposomal vesicles on human-scar-producing cells, keloid fibroblasts, were investigated. Keloids express abundant levels of mucopolysaccharide…
Disclike molecules form various columnar phases. Extensive efforts have been made to make these phases polar. In the course of these attempts, two columnar phases, in which dipoles along the column ferroelectrically switch, were discovered. In this Highlight article, we summarize the attempts to realize polar columnar…