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Structural investigation of metaphosphate glasses
Journal URL: http://www.societyofglasstechnology.org.uk/cgi-bin/open.cgi?page=journal&sessionid=85597106; http://www.ingentaconnect.com/content/sgt/pcg; http://www.societyofglasstechnology.org.uk/cgi-bin/open.cgi?page=%20PC/PC-00a&sessionid=85597106
Guided resonances in asymmetrical GaN photonic crystal slabs observed in the visible spectrum
We demonstrate that guided resonant modes can be readily observed in asymmetrical photonic crystal slabs on high-index substrates. In spite of the high radiative loss associated with all optical modes in these cases, the guided resonant modes are found to give rise to strong high-Q features in the transmission spectra…
Impedance Studies of Diffusion Phenomena and Ionic and Electronic Conductivity of Cerium Oxide
In this study, the electrical conductivity of undoped cerium oxide is evaluated using impedance spectroscopy. We have observed a new phenomenon, which is not related to electrode response but probably to diffusion processes in the grain boundary. An equivalent circuit has been constructed based on the observation, and…
Performance of a Porous Electrolyte in Single-Chamber SOFCs
A cell which consists of a porous 18 μm thick Y-doped (YSZ) electrolyte vol % open porosity) on a NiO-YSZ anode substrate and a cathode using has been investigated in the single-chamber configuration. The cell performance and catalytic activity of the anode was measured in a flowing air-methane gas mixture with variou…
A new Co( ii )-metalloviologen-based electrochromic material integrated in thin multilayer films
A metallosupramolecular coordination polyelectrolyte prepared by the reaction of cobalt(II) with a novel bisterpyridine ligand has been assembled as the active component in electrochromic films by sequential deposition using electrostatic layer-by-layer self-assembly.
The Evolution of Advanced Mechanical Defenses and Potential Technological Applications of Diatom Shells
Diatoms are unicellular algae with silicified cell walls, which exhibit a high degree of symmetry and complexity. Their diversity is extraordinarily high; estimates suggest that about 10(5) marine and limnic species may exist. Recently, it was shown that diatom frustules are mechanically resilient, statically sophisti…
Observation of very large chiral domains in a liquid crystal phase formed by mixtures of achiral bent-core and rod molecules
Experimental observations on the B4 phase of liquid crystal mixtures formed from bent-core (P-8-O-PIMB) and rod (5CB) achiral molecules reveal the stabilization of the B4 phase with an unusually large size of chiral domains. The phenomenon is interpreted as an intrinsic property of the B4 phase when arising below the…
Triple Helical Collagen-Like Peptides: Engineering and Applications in Matrix Biology
Collagen, a large insoluble protein with a characteristic triple helical structure, is found as the most prominent component of extracellular matrix. The functions of collagen are not limited to providing mechanical strength to various tissues and organs as a structural protein, as it has been pointed out that collage…
Self-organization of nanostructured functional dendrimers
In this article, we review some of our recent work on the development and study of the properties of self-organizing supermolecular liquid crystalline dendritic materials. Prior to this purpose, the state of the art in the field of molecular design, structure and properties of liquid-crystalline dendrimers (LCDs) will…
The influence of lateral substituents on the mesophase behaviour of banana-shaped mesogens. Part II
New materials are presented, derived from the original banana compounds where the first smectic phases with polar switching (SmCP) were detected. Our results demonstrate that the introduction of lateral substituents on the central ring (F, Cl, CN, NO2, CH3) and/or on the terminal rings (Cl, Br, CH3) can significantly…
Synthesis of elliptical vanadoborates housing bimetallic centers [Zn4(B2O4H2)(V10B28O74H8)]8? and [Mn4(C2O4)(V10B28O74H8)]10?
The hydrothermal synthesis of three new vanadoborate compounds with elliptical (V10B28O74H8) clusters is described. The clusters contain pairs of bimetallic Zn2 or Mn2 units.
Organic electro-optic modulator using transparent conducting oxides as electrodes
A novel organic electro-optic (EO) modulator using transparent conducting oxides (ZnO and In2O3) as electrodes is demonstrated for the first time. The modulator employs the poled guest-host chromophore/polymer material AJL8/APC having r33=35pm/V and is able to achieve a low Vpi=2.8 V switching voltage for an 8mm-long…
Missing pieces of the puzzle or about some unresolved issues in solid state chemistry of alkali metal aluminohydrides
The paper discusses some unresolved issues in the solid state chemistry of alkali metal aluminohydrides (alanates) relevant to high-capacity hydrogen storage. Analysis of experimental data available in chemical and materials science literature suggests a one-step mechanism for the thermal decomposition of both pure an…
Computer simulation of polypeptide adsorption on model biomaterials
When biomaterials are inserted in a biological environment, for instance in a body implant, proteins do quickly adsorb on the exposed surface. Such process is of fundamental importance, since it directs the subsequent cell adhesion. Here we review recent advances in this field obtained with molecular simulations. Whil…
Periphyton structure, diversity and colonization.
<title>Abstract</title> The morphological characteristics, biochemical composition, taxonomic composition and diversity, as well as the colonization process and sloughing and recolonization of periphyton are reviewed. The proximate composition of periphyton grown on different substrates in different habitats, and a li…
ALD of High-κ Dielectrics on Suspended Functionalized SWNTs
Conformal atomic layer deposition (ALD) on as-grown suspended single-walled carbon nanotubes (SWNTs) is not possible due to the inertness of ALD precursor molecules to the SWNT surface. Here, we present a functionalization technique that makes SWNTs reactive with ALD precursors, and deposit high-κ oxides ( Al 2 O 3 an…
Complex gold nanostructures derived by templating from diatom frustules
Diatom frustules have been used for the first time as templates for the fabrication of gold nanostructures; high-precision replicas featuring complex three-dimensional gold nanostructures from the nano- to the microscale were achieved.
Investigation of the Luminescent Properties of Tb[sup 3+]-Substituted YAG:Ce, Gd Phosphors
Generation of white light closer to daylight with good color-rendering index properties can be achieved with the proper combination of emissions from the phosphor system consisting of semiconductor diode and -doped yttrium aluminum garnet (YAG: Ce, Gd). Here, we report crystal structure and luminescent properties of -…
One‐step flame synthesis of SnO2 / TiO2 composite nanoparticles for photocatalytic applications
SnO 2 / TiO 2 composite nanoparticles have been synthesized in a single‐step by feeding evaporated precursor mixtures into an atmospheric pressure diffusion flame. Particles with controlled Ti: Sn ratios were produced at various flow rates of oxygen, and the resulting powders were characterized by BET surface area ana…