Materials Literature
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Gentle touch: Mechanoresponsive polyelectrolyte brushes show a strong correlation between local fluorescence intensity and local pressures (see picture; PDMS=polydimethylsiloxane). The response of the surface to mechanical stimuli was completely reversible and provided a sensitivity under 10 kPa, similar to human skin.
New pseudobinary phases have been synthesized in the ternary system Pr–Mg–Ni. The Pr 1.5 Mg 0.5 Ni 7 compound is obtained as a pure phase, but it exists under two polymorphic structures: hexagonal Ce 2 Ni 7 -type (2 H; space group P 6 3 / mmc ) and rhombohedral Gd 2 Co 7 -type (3 R; space group R 3̅ m ). The Pr 3.75 M…
The preparation of small shape-controlled Pt nanocrystals, which should be an important material such for as catalytic application, is a hot research target pursued by many active groups. We first succeeded in synthesizing a monodispersed Pt cube of 2.8 nm in size with high shape selectivity. Such simultaneous control…
The inhibitive effect of leaf extract of Euphorbia hirta on aluminium corrosion in HCl and NaOH solutions were studied using gravimetric technique at 30 and 60°C. Results obtained showed that the leaf extract functioned as effective and excellent inhibitors in the acidic and alkaline media. Also, the leaf extract supp…
Samples taken from the core of real‐sized castable pieces were studied under TGA, DTA, SEM , and XRD techniques after hydration during normal dry‐out process. The TGA was also performed at bulk samples, and the effect of volume on the hydration process was evaluated. The castables consisted of dead‐burned magnesia wit…
Chitin is the most abundant natural amino polysaccharide and is estimated to be produced annually almost as much as cellulose. It has become of great interest not only as an industrialized resource, but also as a new functional material of high potential in various fields. Chitin was successfully extracted from the sc…
Abstract Magnetoelectric heterostructures are being actively investigated for utilization in next generation microwave devices such as tunable filters and phase shifters. For efficient microwave absorption and magnetoelectric coupling, relatively thick (>1 µm) epitaxial spinel ferrite films with smooth topographies…
A glass with the composition of stoichiometric cordierite (2Al 2 O 3 ·2MgO·5SiO 2 ) shows surface crystallization during thermal annealing. High temperature X-ray diffraction (HT-XRD) was performed on a compact sample. The surface crystallization is further studied using scanning electron microscopy (SEM) and electron…
The increased production and commercial use of nanoparticulate drug delivery systems combined with a lack of regulation to govern their disposal may result in their introduction to soils and ultimately into groundwater systems. To better understand how such particles interact with environmentally significant interface…
We report a magnetic technique for altering the apparent contact angle of aqueous droplets deposited on a nanostructured surface. Polymeric tubes with embedded superparamagnetic magnetite (Fe(3)O(4)) nanoparticles were prepared via layer-by-layer deposition in the 800 nm diameter pores of polycarbonate track-etched (P…
Solid solution magnesium aluminate spinel with the alumina‐rich composition MgO ·1.2 Al 2 O 3 has been prepared as a transparent polycrystalline ceramic with average in‐line transmission at 550 nm of 84.8 ± 2.7% and >82% throughout the visible spectrum. Starting powders are prepared from mixtures of high purity Mg(…
An intuitive explanation of the increase in localization observed near the Dirac point in doped graphene is presented. To do this, we renormalize the tight binding Hamiltonians in such a way that the honeycomb lattice maps into a triangular one. Then, we investigate the frustration effects that emerge in this Hamilton…
The development of new methods for the facile synthesis of hybrid nanomaterials is of great importance due to their importance in nanotechnology. In this work, we report a new method to deposit Au nanoparticles on the surface of single-walled carbon nanotubes (SWCNTs). Our approach consists of a one pot synthesis in w…
Abstract Composites of cellulose and conjugated polymers based on oligo- and polythiophene are reported, inspired by the assembly of cellulose and lignin in wood as a composite that survives harsh environmental conditions and meets most complex demands. The regioselectively oligothiophene-substituted cellulose derivat…
Abstract After reaction of zein with glyoxal the resulting electrospun fibers have improved resistance to known zein solvents. Durable fibers with diameters of 0.6 μm could be produced. The reaction between zein and glyoxal was carried out in acetic acid (AcOH) at temperatures between 25 and 60°C at various lengths of…
A new approach for fabricating donor-acceptor assembled systems is demonstrated, based on J-type ordered aggregation of a low-molecular zinc porphyrin derivative and subsequent integration of a pyridylated fullerene derivative with coordination and orientation onto the porphyrin aggregates. This system achieves unusua…
Abstract A precise evaluation of the active reaction zone in the electrodes is important to design an effective solid oxide fuel cell (SOFC). A scale analysis and one‐dimensional numerical simulations are conducted to obtain a better understanding of the electrochemical reaction zone in a SOFC anode. In the scale anal…
Methods of formation and physical properties of epoxide composite materials reinforced with carbon nanotubes are considered. An analogy is made between the relaxation properties of carbon nanotubes and macromolecules. The concentration dependences of the electrical conductivity of the epoxy polymers filled with single…
To understand the physiological basis of methanogenic archaea living on interspecies H(2) transfer, the protein expression of a hydrogenotrophic methanogen, Methanothermobacter thermautotrophicus strain ΔH, was investigated in both pure culture and syntrophic coculture with an anaerobic butyrate oxidizer Syntrophother…
Perfekte Symmetrie: Laut Photoelektronenspektroskopie und Rechnungen sind die Borringe in Co©B8− und Ru©B9− mit D8h- bzw. D9h-Symmetrie (siehe Bild) durch die Metallatome stabilisiert. Die Bindung zwischen Metallatom und Borring wird durch sechs delokalisierte σ-Elektronen und sechs delokalisierte π-Elektronen hergest…