Materials Literature
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Electrospinning has become a popular technique for fabricating nanofibers from a variety of materials and has been tailored for a multitude of applications. These nanofibers may be used as devices (e.g., biosensors, field effect transistors (FETs), and resonators) or may be used to fabricate nanoscale features in othe…
Abstract The apparent slip effects of laminar water flow in smooth hydrophobic microchannels and patterned hydrophobic microchannels were investigated. A series of experiments were performed to demonstrate the drag reductions for laminar water flow in hydrophobic microchannels. These microchannels were fabricated from…
The synthesis and optical absorption of a series of porphyrins, and the photoelectrochemical properties of TiO2 solar cells sensititized with these porphyrins was investigated. The different types of porphyrins studied are designated by numbers: the reference compound 1 (Zinc(II) 5,15-bis(4-carboxylphenyl)porphyrin),…
In a previous study, we established that the attraction between electrically charged particles attached to a water/tetradecane interface is stronger than predicted on the basis of the gravity-induced lateral capillary force. Here, our goal is to explain this effect. The investigated particles are hydrophobized glass s…
We present a muon spin rotation (μSR) study of the magnetic and superconducting properties of single crystals of electron-doped BaFe 2− x Co x As 2 with x = 0.08, 0.20 and 0.25 ( T c = 9, 25 and 20 K) and of polycrystalline hole-doped Pr 1− x Sr x FeAsO with x = 0 and 0.2 ( T c = 15 K). In the former series, we observ…
Dendritic nanomaterials are emerging as key building blocks for a variety of nanoscale materials and technologies. Poly(amidoamine) (PAMAM) dendrimers were the first class of dendritic nanomaterials to be commercialized. Despite numerous investigations, the environmental fate, transport, and toxicity of PAMAM dendrime…
Abstract Experiments on a blow‐molding grade of polypropylene have been performed at 135°C using a biaxial testing machine. Both simultaneous and sequential equibiaxial tests were performed at strain rates relevant to solid phase processing regimes. A constitutive model has been developed that includes a single Eyring…
Optically active polyurethane−urea (S-PUU) based on S-1,1′-binaphthyl-2′,2-diol (S-BINOL) and polyurethane−urea (PUU) based on racemic 1,1′-binaphthyl-2′,2-diol (BINOL) were synthesized by hydrogen transfer addition polymerization procedure and characterized by Fourier transform infrared spectroscopy (FT-IR), thermal…
The Cahn-Hilliard equation is often used to describe evolution of phase boundaries in phase field models for multiphase fluids. In this paper, we compare the use of the Cahn-Hilliard equation (of a constant mobility) for the phase variable with that of the singular or modified Cahn-Hilliard equation (of a variable mob…
Thermal analysis has long been essential for designing reliable high-performance cost-effective integrated circuits (ICs). Increasing power densities are making this problem more important. Characterizing the thermal profile of an IC quickly enough to allow feedback on the thermal effects of tentative design changes i…
Comblike copolymers with randomly distributed polystyrene (PS) and polyisoprene (PI) branches, i.e., PCEVE- g -(PS,PI), were synthesized by the “grafting onto” technique. The comblike copolymers exhibit a low dispersity, high molar masses, and controlled number of branches. Their characteristics and behavior as isolat…
A norbornene-functional styrene was synthesized and copolymerized with styrene, and monomer reactivity ratios were calculated in a controlled radical copolymerization. Polylactide- b -poly(norbornenylethylstyrene- s -styrene) (PLA- b -P(N-S)) block polymers were produced by a reversible addition−fragmentation chain tr…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTControlled Photooxidation of Nanoporous PolymersSokol Ndoni*†, Li Li†‡, Lars Schulte†‡, Piotr P. Szewczykowski†‡, Thomas W. Hansen§, Fengxiao Guo†‡, Rolf H. Berg†, and Martin E. Vigild*‡View Author Information† Department of Micro-…
We report Zn-doping effect in the parent and F-doped LaFeAsO oxy-arsenides. Slight Zn doping in LaFe 1- x Zn x AsO drastically suppresses the resistivity anomaly around 150 K associated with the antiferromagnetic (AFM) spin density wave (SDW) in the parent compound. The measurements of magnetic susceptibility and ther…
Abstract Maximaler Erfolg dank Miniemulsion : Der Miniemulsionsprozess ermöglicht die Bildung komplexer Polymernanopartikel und die Verkapselung unterschiedlichster Materialien in einer Polyschale (siehe Beispiele). Eine Funktionalisierung der Nanopartikel gelingt einfach. Polymerisationen zur Erzeugung von Polymernan…
We report the electrical transport properties of arrays of nickel nanowires (diameters ranging from 55 to 13 nm) fabricated by electrodeposition into the cylindrical pores of anodic alumina membranes. X-ray and transmission electron microscope based characterization ensured single crystalline nature of the nanowires.…
Using a confocal Rayleigh light scattering microspectroscopy and imaging system, we followed and recorded the scattering spectra of single gold nanoparticles interacting with living mouse fibroblast cells, during the scale of 1 h. A white light continuum produced by a femtosecond laser was focused on gold nanoparticle…
Munc13 proteins are essential regulators of synaptic vesicle priming and play a key role in adaptive synaptic plasticity phenomena. We recently identified and characterized the Ca(2+)-dependent interaction of Munc13 and calmodulin (CaM) as the molecular mechanism linking changes in residual Ca(2+) concentrations to pr…
Abstract Multiwalled carbon nanotubes (MWNTs) reinforced polyamide 6/polypropylene (PA6/PP = 70/30) composites were prepared by melt compounding. Maleated polypropylene (MPP) was used as a compatibilizer for the composites. The morphology, mechanical properties, thermal stability, rheological properties and crystalliz…
Connectivity in the potential energy landscape of a binary Lennard-Jones system can be characterized at the level of cage-breaking. We calculate the number of cage-breaking routes from a given local minimum and determine the branching probabilities at different temperatures, along with correlation factors that represe…