Materials Literature
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Recent development of tailored organic electric-optic (OEO) materials and their applications in hybrid device systems has been reviewed. Hybrid systems encompass the optical and/or electrical components that form intimate contact with OEO materials, such as metal oxide barrier layers, solution processable passive wave…
Angestrahlt: Nitroarene auf Goldnanopartikeln (3 Gew.-% auf einem ZrO2-Träger) werden direkt zu den entsprechenden Azoverbindungen reduziert, wenn sie bei 40 °C mit sichtbarem oder ultraviolettem Licht bestrahlt werden (siehe Bild). Die Reaktion verläuft hoch selektiv bei Umgebungstemperatur und -druck und ermöglicht…
Crystallization processes are in general sensitive to detailed conditions, but our present understanding of underlying mechanisms is insufficient. A crystallizable chain within a diblock copolymer assembly is expected to couple curvature to crystallization and thereby impact rigidity as well as preferred morphology, b…
Strategies of bone tissue engineering and regeneration rely on bioactive scaffolds to mimic the natural extracellular matrix (ECM) as templates onto which cells attach, multiply, migrate, and function. For this purpose, hybrid biomaterials based on smart combinations of biodegradable polymers and bioactive glasses (BG…
Carbon-supported bimetallic Pt m Ni n electrocatalysts with different Pt/Ni atomic ratios were synthesized through a modified polyol process. The as-prepared electrocatalysts were characterized by X-ray diffraction, transmission electron microscopy, voltammetry techniques, and single-cell tests. It was revealed that t…
Rational molecular design and processing, enabling large-area molecular ordering, are important for creating high-performance organic materials and devices. We show that, upon one-step hot-pressing with uniaxially stretched Teflon sheets, a polymer brush carrying azobenzene-containing mesogenic side chains self-assemb…
Proteins are constantly involved in the multitude of various interactions creating sophisticated networks which define and control all (or almost all) the biological processes taking place in any living organism. Intrinsically disordered proteins or regions play a number of crucial roles in mediating protein interacti…
Doping with metals and non-metals is a popular technique that facilitates visible light activity of titanium dioxide. More recently, rare-earth metals have shown tremendous potential as dopants not only in red-shifting the absorption but also in improving the photocatalysis of TiO2. This feature article discusses rece…
Protein synthesis requires several guanosine triphosphatase (GTPase) factors, including elongation factor Tu (EF-Tu), which delivers aminoacyl-transfer RNAs (tRNAs) to the ribosome. To understand how the ribosome triggers GTP hydrolysis in translational GTPases, we have determined the crystal structure of EF-Tu and am…
Research on bioceramics has evolved from the use of inert materials for mere substitution of living tissues towards the development of third-generation bioceramics aimed at inducing bone tissue regeneration. Within this context hybrid bioceramics have remarkable features resulting from the synergistic combination of b…
Au@Pt nanocolloids with nanostructured dendritic Pt shells are successfully synthesized by chemically reducing both H 2 PtCl 6 and HAuCl 4 species in the presence of a low-concentration surfactant solution. By applying an ultrasonic treatment, the particle size of the Au@Pt nanocolloids is dramatically decreased and t…
Shedding light: Nitroaromatic compounds on gold nanoparticles (3 wt %) supported on ZrO2 can be reduced directly to the corresponding azo compounds when illuminated with visible light or ultraviolet light at 40 °C (see picture). The process occurs with high selectivity and at ambient temperature and pressure, and enab…
The piezoelectric generation of perovskite BaTiO3 thin films on a flexible substrate has been applied to convert mechanical energy to electrical energy for the first time. Ferroelectric BaTiO3 thin films were deposited by radio frequency magnetron sputtering on a Pt/Ti/SiO2/(100) Si substrate and poled under an electr…
ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTTheory of Coupled Electron and Proton Transfer ReactionsSharon Hammes-Schiffer*† and Alexei A. Stuchebrukhov*‡View Author Information Department of Chemistry, Pennsylvania State University, University Park, Pennsylvania 16802, United States, and Department of Chemistry, Unive…
Although most research in the field of organic bulk heterojunction solar cells has focused on combinations of a p-type conducting polymer as a donor and a fullerene-based acceptor, recent work has demonstrated the viability of solution-processed heterojunctions composed entirely of molecular solids. Molecular solids o…
We investigate the dynamic characteristics of metamaterial systems, such as the temporal coherence gain of the superlens, the causality limitation on the ideal cloaking systems, the relaxation process and essential elements in the dispersive cloaking systems, and the extending of the working frequency range of cloakin…
INTRODUCTION: Circulatory support devices are employed to treat heart failure. Such a device could be made from shape memory alloy (SMA) fibers. These Ni-Ti fibers contract when electric current flows through them, thus resembling artificial muscles. An artificial myocardium device made from SMA fibers can directly co…
The aging dynamics of poly(2-chlorostyrene) (P2CS) ultrathin films with thicknesses less than 10 nm were investigated using dielectric relaxation spectroscopy. The imaginary part of the dielectric susceptibility ϵ″ for P2CS ultrathin films with a thickness of 3.7 nm increased with an increase in isothermal aging time,…
The spin dynamics of a quasi-one-dimensional $S=1$ bond alternating spin-gap antiferromagnet $\text{Ni}({\text{C}}_{9}{\text{H}}_{24}{\text{N}}_{4}){\text{NO}}_{2}({\text{ClO}}_{4})$ (abbreviated as NTENP) is studied by means of electron-spin-resonance (ESR) technique. Five modes of ESR transitions are observed and id…
Abstract Poly(p‐phenylene‐2,6‐benzobisoksazole) (PBO) and natural rubber (NR)/high density polyethylene (HDPE) composites were melt‐blended in a Haake internal mixer. The tensile strength, tensile modulus, and impact strength increased with fiber loading and optimized at 20%. Incorporation of clay into the NR/HDPE/PBO…