Materials Literature
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Mixed ionic and electronic conducting (MIEC) oxides are promising materials for use as cathodes in solid oxide fuel cells (SOFCs) due to their enhanced electrocatalytic activity compared with electronic conducting oxides. In this paper, the MIEC oxide was prepared by the sol–gel route. Graded cathodes were deposited o…
Titanium and its alloys have been in industrial use for over half a century; however, applications have been restricted primarily to the aerospace industry, where high strength and light weight are the most critical parameters, and to the chemical industry, where titanium's resistance to corrosion is the most criti- c…
Hierarchical tree-, mushroom- and cockscomb-like ZnO arrays with increasing branching order and complexities have been grown in situ on cheap zinc plates by a simple hydrothermal oxidation approach. Their morphology, crystal structure and orientation relationship are characterized by powder X-ray diffraction, scanning…
The gelation dynamics of a sol of colloidal silica of approximately 7 nm radius particles is studied using a combination of light scattering and rheometry. By changing the ionic strength (by addition of a salt solution resulting in different ultimate molarities) of the mixture, a stable sol can be destabilized, leadin…
The presence of alkylammonium groups covalently grafted on bisphosphonato ligands induces photochromic properties to ligand-coordinated polyoxomolybdate systems. Such intrinsically photoactive polyanions can be used for the preparation of materials combining photochromic polyoxometalates and functional countercations.
Two novel compounds have been hydrothermally synthesized and characterized by IR spectra and single crystal X-ray diffraction analyses. Crystal structure analyses reveal that and exhibit novel 2-D framework structures constructed from tungsten polyoxoanions, metal ions and 4,4-byp units, respectively.
Zn-doped TiO2 nanofibers shelled with ZnO hierarchical nanoarchitectures have been fabricated combining electrospinning of TiO2 (anatase) nanofibers and metal–organic chemical vapor deposition (MOCVD) of ZnO. The proposed hybrid approach has proven suitable for tailoring both the morphology of the ZnO external shell a…
Photoluminescent lanthanopolyoxotungstate core/shell nanoparticles are prepared by the encapsulation of lanthanide-containing polyoxometalates (POMs) with amorphous silica shells. The preparation of morphological well-defined core/shell nanoparticles is achieved by the hydrolysis of tetraethoxysilane in the presence o…
In this paper we report on the magnetic properties of single- and multiwalled carbon nanotubes synthesized using different chemical vapour deposition methods and with variety of catalyst materials (ferromagnetic Fe, FeCo and diamagnetic Re). Different methods yield carbon nanotubes with different morphologies and diff…
Two 15beta-hydroxycardenolides (1,2) and a 16alpha-hydroxycalactinic acid methyl ester (3) along with eleven known compounds including 16alpha-hydroxycalotropagenin, coroglaucigenin, 16alpha-hydroxycalotropin, calactinic acid, calotoxin, 6'-O-(E-4-hydroxycinnamoyl)desglucouzarin, 12beta-hydroxycoroglaucigenin, frugosi…
Single crystal diamond tips with perfect pyramidal geometry were obtained by a combination of chemical vapor deposition and selective oxidation of polycrystalline films. The parameters of the deposition process were chosen to provide growth of a textured film consisting of micrometer sized diamond crystallites embedde…
Reactions of a Co(III) salt with pyrazoles in the presence of a base have yielded metallacyclic {Co(3)}, {Co(10)} and {Co(12)} species whose structural characterization points to a parallel between analogous carboxylate and pyrazolate motifs.
The mechanical properties and water permeability of hierarchical self-assembling membranes and sacs formed from oppositely charged high molecular weight hyaluronic acid (HA) and small molecule peptide amphiphiles (PAs) were studied. Techniques to make reproducible 2D planar membranes and 3D spherical sacs from these m…
This article discusses some of our recent work on the origins of redox activity of undoped nanodiamond (ND) powders, as well as reviewing some properties and applications of this material. The electrochemical activity is attributed to unsaturated bonding at the ND particle surface; hence the most recent understanding…
Three-dimensional (3D) Y2WO6 and Y2WO6: Ln3+ microspheres with novel controllable morphology have been obtained by the hierarchical self-assembly via a hydrothermal synthesis route with a subsequent heat treatment. The amount of citric acid and polyvinylpyrrolidone (PVP) play crucial roles in the controlling of the mo…
Fluorescent homopolymers and amphiphilic block copolymers were prepared by reversible addition-fragmentation chain transfer (RAFT) polymerization of two new styryl-type organoboron monomers; the fluorescence characteristics of PEO block copolymers in aqueous solution were studied.
Rhodamine B-tagged poly(alkyl cyanoacrylate) amphiphilic copolymers have been synthesised, characterised and successfully used to prepare fluorescent nanoparticles for human brain endothelial cell imaging, allowing their uptake and intracellular trafficking to be finely observed.
Amino acid based amphiphilic gelators (carboxylate salts) were employed for the in situ synthesis of gold nanoparticles (GNPs) in hydrogel networks at room temperature without using any external reducing or capping agents for the development of AuNP-hydrogel soft composite. Synthesized AuNP-hydrogel composites were th…
Molecular nanomagnets, often called single-molecule magnets, have attracted much interest in recent years both from experimental and theoretical point of view. These systems are organometallic clusters characterised by a large spin ground state with a predominant uniaxial anisotropy. The quantum nature of these system…
Here we report a peptide-mediated synthesis of Pd NCs in aqueous solution with controllable size in the sub-10 nanometre regime. The specific multifunctional peptide Q7 selected using the phage display technique can bind to the Pd NC surface and act as a stabilizer to mediate Pd crystal nucleation and growth. At the n…