Materials Literature
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Morphosynthesis of calcium-rich materials by tuning the chemical structure of organic matrices has tremendous potential in the preparation of functional mineralized materials. In this paper, we have demonstrated the deposition of thin films of CaCO 3 by subtle modifications of the backbone of poly(methyl methacrylate)…
Crystallization of the metastable polymorph of paracetamol has been shown to occur around the edge of an evaporating aqueous solution. Conditions at the edge of a meniscus during evaporation led to an increase in solution concentration that allowed the nucleation of metastable crystals. This form was then unable to tr…
Abstract The antibacterial activities of chitosan and its water‐soluble derivatives on E. coli were studied according to four influencing factors in vitro . The antibacterial study showed that chitosan, O ‐hydroxyethyl chitosan (O‐HECS), and O ‐carboxymethyl chitosan (O‐CMCS) could inhibit the growth of the microbial.…
Abstract Soluble polyimides were prepared from suitable monomers and were evaluated for their thermal and mechanical properties. The polymers were processed into films for use as supports for transparent, conductive indium tin oxide (ITO) layers. After deposition, annealing in vacuo at temperatures up to 400°C was per…
Centimeter long aluminum‐doped zinc oxide (AZO) nanofibers were prepared by electrospinning from polyvinyl alcohol (PVA) aqueous solutions, and the fibers with controlled morphology were expected to have potential applications in gas‐sensing and optoelectronic devices. In our research, the diameter and morphology of t…
Pristine (carboxylated) and aminated polypyrrole nanotubes were successfully fabricated using vapor deposition polymerization with a template. In particular, aminated polypyrrole nanotubes were readily synthesized by modifying the nanotube surface with open polyamine chains. Pristine and aminated polymer nanotubes wer…
A series of diatomite catalysts were treated and characterized. For the first time, the resulting materials were used in catalysis for the hydroxylation of phenol with H2O2 and showed very high hydroxylation activity due to the Fe species in the diatomite. The effect of HCl treatment, contents of catalysts and H2O2 we…
Abstract In this study, we investigated the relationships between the thermal properties versus maturity and fineness ( H ) of 80 selected cotton fiber samples. The instrument measurements for maturity and H were (1) micronaire as determined with a high‐volume instrument, (2) maturity ratio and H as determined with an…
Abstract The catalytic performance of a cavity‐containing [(porphyrin)Mn] in the epoxidation of alkenes is described. Inside the catalyst cavity, nitrogen‐containing axial ligands can be bound to the porphyrin metal with high association constants, resulting in strong activation of the catalyst in the presence of only…
Meeting point: Carbon nanotubes (CNTs) are produced by an equimolar reaction between C2H2 and CO2 (see scheme). CO2 can be introduced as a gas or a carbonate support of the metal particles. When CaCO3 is used, the growth of a nanotube stems from the triple-point junction, which corresponds to the area surrounding the…
Schieben und Ziehen durch drei tert-Butyl- bzw. zwei Carbonsäuregruppen führt zu einem Sensibilisator (siehe Bild) mit einer Umwandlungseffizienz einfallende Photonen→Strom von 75 %. Eine mit dieser Verbindung sensibilisierte Zelle liefert eine Kurzschluss-Photostromdichte von (6.50±0.20) mA cm−2, eine Leerlaufspannun…
We present high‐temperature electrical transport and thermoelectric power of K and/or La‐doped Ca 3 Co 4 O 9 ‐based ceramics. Temperature and doping dependence of electrical transport properties indicate that both K and La substitutions can increase electrical conductivity at a high temperature, which are mainly relat…
A comparative analysis of the copolymerization behavior between an electro-active terthiophene and a carbazole moiety of a conjugated polymer precursor was investigated using electrochemical and hyphenated electrochemical methods. Five different precursor polymers were first synthesized and characterized using NMR, IR…
This review covers the development of the understanding of the deformation micromechanics of both synthetic and natural polymeric fibres using spectroscopic and X-ray diffraction techniques. The concept of fibres as composites, where hard and stiff phases are combined with softer polymeric materials is also discussed.…
Two new series of neutral oxamato-bridged heterobimetallic chains of general formula [MCu(L(x))(2)] m DMSO (m=0-4) (L(1)=N-2-methylphenyloxamate, M=Mn (1 a) and Co (1 b); L(2)=N-2,6-dimethylphenyloxamate, M=Mn (2 a) and Co (2 b); L(3)=N-2,4,6-trimethylphenyloxamate, M=Mn (3 a) and Co (3 b)) have been prepared by react…
Order, order: Mesoporous copper oxide was synthesized for the first time by double replication from ordered mesoporous silica SBA-15 via the ordered mesoporous carbon intermediate CMK-3 (see picture). The new material has potentially exciting applications in catalysis or lithium-ion batteries.
Carbon foams are hypothetical carbon allotropes that contain graphitelike ($s{p}^{2}$ carbon) segments, connected by $s{p}^{3}$ carbon atoms, resulting in porous structures. In this work the density-functional-based tight-binding method with periodic boundary conditions was employed to study the energetics, the stabil…
Abstract Single‐walled carbon nanotubes (SWNTs) are functionalized through both covalent and noncovalent bonding approaches to enhance dispersion and interfacial bonding. The coefficient of thermal expansion (CTE) of the functionalized‐SWNT‐reinforced epoxy composites are measured with a thermal mechanical analyzer (T…
The properties of Cu$_{x}$TiSe$_{2}$ are studied by band structure calculation based on the density functional theory for supercells. The density-of-states (DOS) for $x$=0 has a sharply raising shoulder in the neighborhood of the Fermi energy, $E_F$, which can be favorable for spacial charge modulations. The Cu impuri…
The dependence of thermally induced spontaneous magnetization reversal on time-dependent cooling protocols was studied. Slower cooling and longer waiting close to the Nèel temperature of the antiferromagnet ($T_N$) enhances the magnetization reversal. Cycling the temperature around $T_N$ leads to a thermal training ef…