Materials Literature
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An aminopropyl-functionalized magnesium phyllosilicate clay was synthesized and used as an exfoliated precursor for the intercalation of myoglobin (Mb), haemoglobin (Hb) or glucose oxidase (GOx). Intercalation was achieved by exfoliation of the as-synthesized organoclay in water followed by room temperature re-assembl…
Optical fibres with bismuth-doped silicate glass core were fabricated by MCVD technique for the first time. Absorption and luminescence spectra, luminescence lifetime, and optical amplification at wavelength of 1.3 μm were studied in such fibres. (2 pages)
Polysaccharide multilayer nanocapsules have been fabricated in aqueous media by the layer-by-layer self-assembly of chitosan (CHI) and sodium alginate (ALG) on monodisperse polystyrene (PS) nanoparticles with a diameter of 180 nm as template, followed by removal of the templates through dissolving in THF. The pH and a…
The synthesis of mesoporous boron nitride, using an aminoborazine as the boron nitride source, with silica (SBA-15) or mesoporous carbon (CMK-3) as the template is compared. Tri(methylamino)borazine (MAB) is converted to BN inside the mesopores of silica or carbon molecular sieves through a mild thermal process. Boron…
A convenient, simple, single-source solution synthesis of Ge nanocrystals via thermal reduction of Ge(II) precursor Ge[N(SiMe3)2]2 in a non-coordinating solvent at 300 degrees C and 1 atm Ar is described.
Janus silica nanoparticles, regioselectively functionalized by two different chemical groups, were synthesized through a multistep procedure based on the use of a polystyrene nodule as a protecting mask.
ABSTRACT: Wheat and rye bread artificially inoculated with molds were packed in modified atmospheres of 0%, 50%, 75%, or 100% CO 2 balanced with N 2 , and 3 levels of residual O 2 , 1%, 0.03%, or <0.01%/O 2 ‐absorber, and stored for 30 to 35 d. Modified atmosphere packaging (MAP) was quantitatively more effective for…
Atmospheric pressure chemical vapour deposition of V2−xMxO2 (M = Mo, Nb; X = 0.01–0.003) thin films was achieved on glass substrates from the reaction of VOCl3, H2O and MCl5. Comparable reactions with SnCl4 formed SnO2 : VO2 composites. The ease with which solid solutions or composite films formed was related to the r…
Water soluble CdTe nanocrystals covered with cationic thiol derivatives are efficiently transferred into a hydrophobic ionic liquid, in which they show enhanced photoluminescence.
The nonlocal polymerization-driven diffusion model (NPDD) has been shown to predict high spatial frequency cut-off in photopolymers and to accurately predict higher order grating components. We propose an extension to the NPDD model to account for the temporal response associated with polymer chain growth. An exponent…
An ultraviolet-emitting conjugated polymer, poly(9,9'-alkyl-3,6-silafluorene) with a wide band gap of 4.0 eV, has been synthesized and characterized.
In this paper, we review our recent experimental results on hydrogen storage properties of light elements Li, C and Mg based nano-composite materials. The results are summarized as follows: In the Li-N-H system, such as the ball milled 1:1 mixture of Li amide and Li hydride containing a small amount of TiCl3 (1 mol%),…
Research aimed at producing new nanocomposites with improved properties has dramatically increased in the last decade, especially on materials tailored at a nanometric level, such as fullerenes and carbon nanotubes. The use of nanoforms as reinforcement of organic polymers has opened the possibility of developing nove…
A form of soft matter, physical gels, has been exploited for many practical purposes for several centuries. During the last decade, several types of physical gels have been developed to clean surfaces for art conservation and restoration. A short history and an explanation of the structures and properties of these gel…
The structures of poly(3,4-ethylenedioxythiophene) (PEDOT) and poly(3,4-ethylenedithiathiophene) (PEDTT) vary only in the substituent chalcogen atoms, yet the electronic properties of the materials are surprisingly dissimilar. The difference in electronic band gaps is approximately 0.8 eV and the polymers behave very…
We propose a new design for an optical sensor based on porous silicon structures. We present an analysis based on a pole expansion, which allows for the easy identification of the parameters important for the operation of the sensor, and the phenomenological inclusion of scattering losses. The predicted sensitivity of…
Supramolecular liquid crystalline (LC) dendrimers were prepared by self-assembly of first to fifth generation amino terminated DAB dendrimers with facial amphiphilic carboxylic acids. These carboxylic acids are composed of three distinct incompatible segments, a rigid rod-like terphenyl core, two terminal alkyl chains…
In the present work we study thin films of copper oxide that were deposited by oxidation of copper thin films on silicon substrates in temperatures varying from 150 °C up to 450 °C. Copper films were deposited by vacuum evaporation and their thickness was estimated from the evaporated mass. X-rays diffraction (XRD) pa…
It has recently been demonstrated [ I. Sieber , B. Kannan , and P. Schmuki , Electrochem. Solid-State Lett. , 8 , J10 (2005) ] that Ta can be porosified by anodic oxidation in diluted HF electrolytes. Pore morphology strongly depends on the HF concentration in the electrolyte and anodization time. In the present artic…
The first Eu3+ chelate-based phosphorescence probe specific for singlet oxygen has been designed, synthesized and characterized. The probe is highly sensitive, selective and water soluble for time-resolved luminescence detection of singlet oxygen with a detection limit of 2.8 nM.