Materials Literature
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Improving the hydrogen ab- and desorption kinetics in complex hydrides is essential if these materials are to be used as reversible hydrogen storage media in the transport sector. Although reductions in particle size and the addition of titanium based compounds have been found to improve the kinetics significantly, th…
The galvanostatic formation of self-organized nanotubular Ti O 2 layers on titanium was investigated in 1 M ( N H 4 ) 2 S O 4 + 0.5 wt % N H 4 F electrolytes. Under specific electrochemical conditions (anodization above a critical current density) large potential oscillations were observed. The electrochemical and mor…
The potentials of carbon nanotubes as building blocks for future electronics are explored. They are found to perform favorably in terms of ON state current density as compared to the conventional Si technology, owing to their superb electron transport properties and compatibility with high-K gate dielectrics.
Abstract The chemistry of N-confused porphyrin (NCP) and its analogs started in 1994. Since then, considerable progress has been made in understanding the unique properties of NCP and its analogs, which confer characteristic reactivity and metal complex formation. The evolved isomers, multiply NCPs, and expanded N-con…
We report here the first AFM single capsule mechanical measurements on hydrogen-bonded polymeric multilayer microcapsules made of poly(vinylpyrrolidone)/poly(methacrylic acid) (PVPON/PMAA) and of poly(-vinylpyrrolidone-co-NH-20)/poly(methacrylic acid) (PVPON-co-NH-20/PMAA), as well as of capsules derived from these sy…
Samples of a hybrid composite of polyhydroxybutyrate (PHB), a biodegradable polyester, and hydroxyapatite (HA), with different PHB/HA ratios, have been prepared using mechanical-physical method. Electron microscopy, X-ray structure analysis and differential thermal analysis have been used to investigate the structure…
A numerical model was developed for the simulation of solidification structure formation during the continuous casting process of an Fe–0.7mass%C alloy. In this model, the cellular automaton method was combined with heat transfer calculation during the continuous casting process. The effect of electromagnetic stirring…
The presence of alkoxyl chains on the single-molecule magnet [(Pc')2Tb(III)] and its planar character favour its 2-D self-assembly on HOPG with the molecular plane parallel to the graphite surface, enabling us to control and/or predict the orientation of the preferential magnetization axis on the surface.
Low-frequency ultrasound has been investigated as an adjuvant to antimicrobial therapy, targeted at both planktonic and biofilm (sessile) organisms. Our previous work showed that ultrasound (US) effectively enhances the bactericidal activity of certain antibiotics against planktonic cultures (Pitt et al., 1994; Redisk…
Atomic force microscopy was used to investigate ferroelectric switching and nanoscale domain dynamics in epitaxial PbZr0.2Ti0.8O3 thin films. Measurements of the writing time dependence of domain size reveal a two-step process in which nucleation is followed by radial domain growth. During this growth, the domain wall…
Porous inorganic solids have found great utility as catalysts and sorption media because of their large internal surface area, i.e. the presence of voids of controllable dimensions at the atomic, molecular, and nanometer scales. With increasing environmental concerns worldwide, nanoporous materials have become more im…
A homogeneous layer of silver sulfide or selenide was coated onto gold nanorods in aqueous solution by exposing Au/Ag core/shell nanorods to S2− or Se2− in an oxidizing environment. The formation of the silver chalcogenide layers was confirmed by transmission electron microscopy (TEM) and selective area electron diffr…
In our pursuit of luminescent lanthanide ion-based coordination polymers, we have isolated several complexes with nitrobenzoic acid ligands and characterized these by X-ray crystallography and luminescence spectroscopy. 2-Nitrobenzoic acid reacts with Eu(III) to form 1, which crystallizes in the P-1 space group, with…
We describe here the development of protective surface films on a Mg alloy in ionic liquids (ILs) based on the bis(trifluoromethanesulfonyl)amide (TFSA) anion. The film is shown to provide improved corrosion resistance to the alloy against humid environments as well as in the presence of chloride. Film formation is th…
The synthesis of the probe complex . and photophysical studies in aqueous media are described. . is designed to be luminescently responsive to Zn(II) in the presence of a competitive ionic mixture at pH 7.4. The structure of the complex is based upon a carboxylate functionalized azamacrocycle and possesses a chromopho…
Diatoms produce diverse three-dimensional regular silica structures with nanometer to micrometer dimensions and hold considerable promise for biological or biomimetic fabrication of nanostructured materials and devices. In this paper, a simple procedure for fabrication of gold nanostructures with complex morphologies…
The amphiphobic nature of carbon nanotubes allows them to stabilise droplets of water-insoluble monomers dispersed in the aqueous nanotube suspension, leading to a flexible route to electrochemical synthesis of useful nanoporous composites of nanotube doped conducting polymers, and potentially to other chemistry invol…
Reduction and reoxidation kinetics of Ni-based solid oxide fuel cell (SOFC) anodes were investigated over a range of temperatures between 600 and . Dense (no open porosity) two-phase (yttria-stabilized zirconia) samples, with and without small amounts of oxide additives (CaO, MgO, ), were fabricated and then reduced i…
Metal-borohydrides M(BH4)n (M=Mg, Sc, Zr, Ti, and Zn; n=2–4) were synthesized by mechanical milling process according to the following reaction; MCln+nLiBH4/nNaBH4→M(BH4)n+nLiCl/nNaCl. Then the thermal desorption properties of M(BH4)n were investigated by gas-chromatography and mass-spectroscopy combined with thermogr…
Transparent nanocrystalline Cu2O films (Eg = 2.6 eV) were electrodeposited from a dimethyl sulfoxide medium; these films exhibit interesting optical and photoelectrochemical properties, and can be converted to transparent CuO films.