Materials Literature
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Clicking together: The Suzuki–Miyaura coupling of β,β′-diborylated porphyrin blocks and meso,meso′-dibrominated porphyrin blocks was used for the construction of directly meso–β doubly linked porphyrin rings including two tetraporphyrin rings, hexaporphyrin rings, and a bridged heptaporphyrin (see picture).
Block copolymers show a variety of microdomain structures due to their ability to phase separate. The bicontinuous gyroid phase and its behavior under the influence of external fields are particularly interesting with regard to technological applications. In this paper, we studied the behavior of a gyroid-forming bloc…
Carbon nanotubes can be dispersed by a variety of molecules. We investigate the dynamics of protein-assisted carbon nanotube dispersion in water. We find that in equilibrium, only a small fraction of the dispersants is indeed adsorbed to the nanotube surface, while there is a fast exchange process between the adsorbed…
One of the challenges in the chemistry of actinide and lanthanide (f-ion) complexes is quantifying exchange coupling of f-ions. While qualitative information about exchange coupling may be readily obtained using the diamagnetic substitution approach, obtaining quantitative information is much more difficult. This arti…
We report on the amorphous-to-crystalline phase transformation of rubrene thin films. The crystallization of the organic thin films displays disk-like domains whose nucleation and growth follow phase transformation kinetics well-established for inorganic materials under certain time and temperature conditions. We unde…
Applying the hydrogen (H) radical exposure at the last step of MOSFET fabrication process, an oxygen (O)-terminated channel was converted to a H-terminated one to obtain subsurface hole accumulation for field-effect transistor operation. Low-resistive titanium carbide (TiC) source/drain and alumina gate oxide were res…
meso-Pyrimidinyl-substituted AB(2)-corroles were efficiently synthesized starting from 5-mesityldipyrromethane and various 2-substituted 4,6-dichloropyrimidine-5-carbaldehydes. The corrole yield was significantly enhanced by optimization of the amount of Lewis acid catalyst (BF(3).OEt(2)). The main advantage of pyrimi…
Understanding the surface orientation and interactions between biomolecules and nanoparticles is important in order to determine their effects on the final structure and activity. At present, limited analytical techniques are available to probe these interactions, especially for materials dispersed in solution. We rec…
Power generation using gas turbine power plants operating on the Brayton cycle suffers from low efficiencies. In this work, a solid oxide fuel cell (SOFC) is proposed for integration into a 10 MW gas turbine power plant, operating at 30% efficiency. The SOFC system utilizes four heat exchangers for heat recovery from…
Carbon-nanotube-based field effect transistors (CNFETs) have been employed as highly sensitive chemical sensors. Often used as the sensor output signal, the gate threshold voltage (V(th)) is subject to concentration-dependent shifts upon exposure to target analytes. However, an unambiguous determination of the intrins…
A new poly(2-alkyl-2-oxazoline) having a branched side chain, namely, 2-(3-ethylheptyl)-2-oxazoline ( EHOx ), was synthesized. The microwave-assisted homopolymerization as well as the copolymerization with 2-ethyl-2-oxazoline ( EtOx ) are reported, whereby the determination of the reactivity ratios indicates the occur…
The thermal expansion properties of Mn 3 Zn 1− x Sn x N ( x =0.1, 0.2, 0.3, 0.5, 0.8, 1.0) compounds were investigated by variable temperature X‐ray powder diffraction. With increasing Sn content, the thermal expansion behavior of Mn 3 Zn 1− x Sn x N changes from positive to negative and returns to positive near the m…
A review of recent advancements in the combination of ultrasonolysis with other advanced oxidation processes is studied. This study is based on the recent achievements and developments in the field of water and wastewater treatment using ultrasonic irradiation by means of acoustic cavitation with other advanced oxidat…
Abstract Blending two polymers is a common and effective way to develop a new material with combinations of properties not possessed by individual polymers and to overcome some limitations of individual components. This study aimed at developing a novel scaffold to mimic natural extracellular matrix (ECM) and to promo…
Kügelchen in Bewegung: Die Rotations- und Translationsbewegung magnetischer Janus-Partikel mit nanoskopischer Oberflächenstruktur kann durch ein externes Magnetfeld gesteuert werden (siehe Bild). Die nanoskopischen Oberflächenmuster verstärken die mikroskopische Bewegung der Mikrokügelchen, indem sie eine starke Koppl…
A low temperature, solid state synthesis technique has enabled the production of homogeneous samples of La 3− x − y Yb y Te 4 . This allows the substitution of divalent Yb to be utilized to optimize the thermoelectric performance in lanthanum telluride. The addition of Yb 2+ changes the electrical transport properties…
Carbon nanotubes (CNTs) were serendipitously discovered as a byproduct of fullerenes by direct current (DC) arc discharge; and today this is the most-wanted material in the nanotechnology research. In this brief review, I begin with the history of the discovery of CNTs and focus on CNTs produced by arc discharge in hy…
We report advances in the growth, characterization and photovoltaic properties of SnS nanocrystals, with controlled < 10 nm size, and their inclusion into a lead chalcogenide solar cell. The SnS/PbS nanocrystalline film heterojunction is shown to display a type II band alignment, in which the direction of flow of the…
By contrast with the rich, wurztite-related, one-dimensional nanostructure of ZnO and its wide variety of applications, there only exists a few methods for the controlled and designed synthesis of one-dimensional CdSe nanostructures. Here, we describe a low-temperature and directed preparation of CdSe nanowires in a s…
Solution-processed inorganic/organic hybrid films based on anatase TiO(2) nanocrystals and poly (9,9-dihexylfluorene) (PFH) are fabricated via a simple spin-coating method and characterized by atomic force microscopy, UV-vis absorption and photoluminescence spectra. The photodetector devices are made from hybrid TiO(2…