Materials Literature
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Helicobacter hepaticus, a causative agent of chronic hepatitis and hepatocellular carcinoma in mice, expresses a nickel-containing hydrogen-oxidizing hydrogenase enzyme. Growth of a hyaB gene-targeted mutant was unaffected by the presence of hydrogen, unlike the wild-type strain, which showed an enhanced growth rate w…
The preparation and dielectric properties of potassium niobate tantalate (KTN) have been investigated with the aim of exploring the material's potential for ferroelectric tunable applications. The samples were prepared both by conventional sintering in air and by uniaxial hot pressing. A relative average density great…
Channeled yttria‐stabilized cubic phase of the zirconia (Ni–YSZ) cermets are produced by reduction of laser‐assisted directionally solidified NiO–YSZ lamellar eutectics. The material is formed by ∼400 nm wide alternating lamellae of 40% porous Ni and YSZ, which serve as parallel channels for gas flow and electronic tr…
Thin films of ZnO agave-like nanowires were prepared on amorphous carbon thin layers on silicon substrates using thermal chemical vapour transport and condensation without any metal catalysts. The unusual superhydrophobicity of the fabricated surface was measured; the water contact angle reaches 151.1°. On the basis o…
Crystallization of three new organic/inorganic hybrid solids ( 1 − 3 ) based on octamolybdate under self-assembly conditions has demonstrated the structure-directing role of three hydrogen-bonded organic dimers (supramolecular synthons) in the construction of multidimensional networks. In acidified aqueous molybdate s…
Structural, magnetic, and resistive properties of the chromium substituted ${\mathrm{SrRu}}_{1\ensuremath{-}x}{\mathrm{Cr}}_{x}{\mathrm{O}}_{3}$ perovskites with increased ferromagnetic transition temperature from 163 to 188 K were studied for polycrystalline samples synthesized in air and at high pressure. The Cr sol…
We explore the generality of nanoparticle haloing as a novel colloidal stabilization mechanism in binary mixtures of silica microspheres and polystyrene nanoparticles. By selectively tuning their electrostatic interactions, both the initial microsphere stability and the role of nanoparticle additions are varied. Adsor…
A novel and facile preparation method for layer-by-layer (LbL) self-assembled films incorporating quantum dots (QDs) and having intense photoluminescence (PL) from blue to red is presented. Functional sol-gel-derived glass layers prepared by the hydrolysis of 3-aminopropyltrimethoxysilane (APS) or 3-mercaptopropyltrim…
Preferential growth of pure single-walled carbon nanotubes (SWNTs) over multi-walled carbon nanotubes (MWNTs) was demonstrated at low temperature by water plasma chemical vapor deposition. Water plasma lowered the growth temperature down to 450 degrees C, and the grown nanotubes were single-walled without carbonaceous…
This paper reports the studies on micelle formation of new biodegradable amphiphilic poly(ethylene oxide)-poly[(R)-3-hydroxybutyrate]-poly(ethylene oxide) (PEO-PHB-PEO) triblock copolymer with various PHB and PEO block lengths in aqueous solution. Transmission electron microscopy showed that the micelles took an appro…
The effect of iron and iron/yttrium codoping on the densification and grain growth of ultra high‐purity (99.995%) fine‐grained alumina has been studied. The experiments were carried out under both oxidizing (flowing air) and reducing conditions (N 2 /H 2 mixture, p O 2 ∼5.1 × 10 −14 ). For studies carried out in air,…
Closed‐cell foams were fabricated by incorporating two different grades of hollow alumino‐silicate spheres (cenospheres) into a silicon carbide matrix. The matrix was formed by the pyrolysis of a preceramic polymer, and multiple polymer infiltration and pyrolysis (PIP) cycles were employed to minimize the open voids i…
Tensile properties of Tyranno™‐SA near‐stoichiometric silicon carbide (SiC)‐fiber–reinforced chemically vapor‐infiltrated SiC‐matrix composites with pyrolytic carbon interphases were experimentally studied. The influence of interphase thickness in a range of 60–300 nm on the tensile properties of the materials appeare…
A new efficient photocaging system with a fluorescence reporting function has been developed. The photolabile latch is based on adducts of C-nucleophiles with aromatic ketones, such as thioxanthones and xanthones. The system is designed to quantify the release of biological effectors and to monitor their spatial distr…
Surface modification of poly(dimethylsiloxane) (PDMS) was carried out via CF4 plasma treatment. The test PDMS used contains significant amounts of quartz and silica fillers, while the control material is the same PDMS with quartz removed by centrifugation. Fluorination accompanied with roughening was produced on both…
The temperature dependence of the reflectance of the cubic bismuth pyrochlores ${\mathrm{Bi}}_{3∕2}\mathrm{Zn}{\mathrm{Ta}}_{3∕2}{\mathrm{O}}_{7}$, ${\mathrm{Bi}}_{3∕2}\mathrm{Mg}{\mathrm{Nb}}_{3∕2}{\mathrm{O}}_{7}$, ${\mathrm{Bi}}_{3∕2}\mathrm{Mg}{\mathrm{Ta}}_{3∕2}{\mathrm{O}}_{7}$, and ${\mathrm{Bi}}_{3∕2}{\mathrm{…
Four-arm, star-shaped poly(D,L-lactide) (PDLLA) oligomers of controlled molar mass and narrow molar mass distribution were successfully synthesized by use of an ethoxylated pentaerythritol initiator. Derivatization of the terminal hydroxyl groups with either methacrylic anhydride (MAAH) or 2-isocyanatoethyl methacryla…
For the first time, the intercalation properties of acid-activated montmorillonites treated at different acid/clay (w/w) ratios with a cationic surfactant cetyltrimethylammonium (C16TMA) hydroxide are reported. The acid activation causes a reduction in the number of cation exchange sides and, hence improves the exfoli…
Luminescent Y 3 Al 5 O 12 : Eu 3+ (YAG : Eu 3+ ) and Y 3 Al 5 O 12 : Tb 3+ (YAG : Tb 3+ ) powders with nanometre and micrometre-sized particles and films have been successfully synthesized by sol–gel route from alkoxide precursors. Advanced YAG coatings were achieved by spray and dip-coating methods, giving rise to di…
Multilayer films were assembled from a copolymer containing both weakly and strongly charged pendant groups, poly(4-styrenesulfonic acid-co-maleic acid) (PSSMA), deposited in alternation with poly(allylamine hydrochloride) (PAH). The strongly charged groups (styrene sulfonate, SS) are expected to form electrostatic li…