Materials Literature
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The new synthetic polymers have a key role to play in the separation science. The derivatization of these polymers has made them an efficient class of substrate, having unique properties and the selectively tailored surface chemistries for target molecules. The deeper and detailed characterization of complex sample ty…
Small molecule organic solar cells are becoming increasingly efficient through improved molecular design. However, there is still much to be understood regarding device operation. Here we study bilayer solar cells employing a 2,4-bis[4-( N,N -diisobutylamino)-2,6-dihydroxyphenyl] squaraine (SQ) donor and fullerene acc…
In lithium/oxygen batteries with liquid nonaqueous electrolytes, metal or metal oxide electrocatalysts are generally used in the carbon cathode to decrease the cell overvoltage and increase the capacity. In this study, a composite carbon cathode composed of Ketjen black carbon in a mixture with catalytically inactive…
The Tritryps Trypanosoma brucei, Trypanosoma cruzi and Leishmania donovani are responsible for great morbidity and mortality in developing countries. Their dimeric dUTPases are members of the all-α NTP pyrophosphohydrolase family and represent promising drug targets due to their essential nature and markedly different…
Abstract Hybrid carbon nanofibers (NFs) with extremely high Si loading (>65 wt %) are fabricated through the water‐based electrospinning of polyvinyl alcohol/Si nanoparticle (NP) solutions for Li‐ion battery anode applications. Our Si‐rich carbon (SRC) NFs show many facilitated charge‐transport features and increased…
We present analysis of nanosecond-picosecond dynamics of Green Fluorescence Protein (GFP) using neutron scattering data obtained on three spectrometers. GFP has a β-barrel structure that differs significantly from the structure of other globular proteins and is thought to result in a more rigid local environment. Desp…
Large-pixel-count holograms are one essential part for big size holographic three-dimensional (3D) display, but the generation of such holograms is computationally demanding. In order to address this issue, we have built a graphics processing unit (GPU) cluster with 32.5 Tflop/s computing power and implemented distrib…
Mit Pt überzogen: Ein gleichmäßiges Katalysatorprofil, das zu einer effektiven radialen Ladungssammlung in Si-Nanoröhren führt, wird durch die Atomlagenabscheidung von Pt-Nanopartikeln erzielt. Für die resultierende Photoelektrode wird eine hohe Photospannung bei niedriger Überspannung gemessen; sie ist sehr stabil ge…
X-ray photoelectron spectroscopy (XPS) and cathodoluminescence (CL) method have been employed to study the chemical composition and the oxygen vacancy concentration of HfO2, Sc2 O3 and (HfO2)1−x(Sc2O3)x films. It was found that the increase of Sc content led to monotonic decreasing the Hf4f7/2 and Sc2p3/2 binding ener…
We report on the electronic roles in filamentary-type switching of binary oxide-based resistive random access memories using ab initio calculations. We show that charge injection and removal determine the thermodynamic stability of the vacancy filament and the diffusion in the memory devices; electron injection induce…
In this paper, composite polymer electrolytes were prepared by a blend of poly(ethylene oxide) (PEO) and poly(acrylonitrile) (PAN) as a polymer matrix, ethylene carbonate as a plasticizer, LiClO4 as a salt, and by containing a different content of nano-sized Al2O3. The composite films were prepared by using the soluti…
A supramolecular complex was formed between zinc chlorin carboxylate (ZnCh – ) and lithium ion-encapsulated [60]fullerene (Li + @C 60 ) by an electrostatic interaction in benzonitrile (PhCN). The binding constant was determined to be 7.7 × 10 4 M –1 . No fluorescence quenching of ZnCh – was observed upon addition of L…
Double-sided insulated gate bipolar transistor (IGBT) assemblies bonded by sintered nanosilver are fabricated in this paper. Die-shear tests reveal that the lowest bonding strength between the chip and the substrate of the assemblies is about 20 MPa. Furthermore, temperature cycling tests ( -40°C to 150°C) indicate th…
The formation of metal/organic interfaces is a complicated process involving chemical interaction, physical nucleation and diffusion, and thin film growth. It is closely related to the performance of organic electronic devices. To understand this process, we investigate the system of aluminum (Al) and tris(8-hydroxyqu…
Three isomeric donor-acceptor (DA) chromophores based on pyrene were synthesized to study the effects of substitution pattern on intramolecular charge-transfer absorption through pyrene. These chromophores are nonfluorescent and absorb light in the long-wavelength region approaching 700 nm, making them promising light…
There has been a resurgence of interest in alpha-tricalcium phosphate (α-TCP), with use in cements, polymer composites and in bi- and tri-phasic calcium phosphate bone grafts. The simplest and most established method for preparing α-TCP is the solid state reaction of monetite (CaHPO4) and calcium carbonate at high tem…
The magnetically induced current density of tetraoxa-isophlorin and dioxa-dithia-isophlorin have been studied at the density functional theory (DFT) level using the gauge including magnetically induced current method (GIMIC). The current density calculations show that the studied isophlorins with formally 28 π electro…
New semiconducting polymers reach record mobility despite apparently lower structural order.
Insect embryos complete the outer form of the body via dorsal closure (DC) of the epidermal flanks, replacing the transient extraembryonic (EE) tissue. Cell shape changes and morphogenetic behavior are well characterized for DC in Drosophila, but these data represent a single species with a secondarily reduced EE comp…
An increasingly used parameter in structural biology is the measurement of distances between spin labels bound to a protein. One limitation to these measurements is the unknown position of the spin label relative to the protein backbone. To overcome this drawback, we introduce a rotamer library of the methanethiosulfo…