Materials Literature
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This work studies the effect of the growth temperature on the morphology and emission characteristics of self-assembled InGaN nanocolumns grown by plasma assisted molecular beam epitaxy. Morphology changes are assessed by scanning electron microscopy, while emission is measured by photoluminescence. Within the growth…
Protein assembly at the air-water interface (AWI) occurs naturally in many biological processes and provides a method for creating biomaterials. However, the factors that control protein self-assembly at the AWI and the dynamic processes that occur during adsorption are still underexplored. Using fluorescence microsco…
We performed kinetic study on the photoconductivity of coassembled nanotubes consisting of an amphiphilic hexa- peri -benzocoronene (HBC) and a HBC derivative appended with an electron-accepting trinitrofluorenone (TNF) moiety. The transient signals measured by flash-photolysis time-resolved microwave conductivity (FP…
Charge transport properties such as electron lifetime (τ n ), electron diffusion coefficient ( D n ), and electron diffusion length ( L n ) were investigated for the ZnO nanorod aggregate photoelectrodes annealed at different temperatures to understand the effects of structural evolution on the charge transport proper…
A novel sugar–glass-nanoparticle (SGnP) system is developed to stabilize biomolecules for incorporation and delivery from a drug delivery system. It yields excellent protection from process-related stresses with little or no degradation, very good encapsulation efficiency, and storage stability, as well as giving burs…
Photovoltaic characteristics of a low bandgap polymer, poly[(4,4′-bis(2-lethylhexyl)dithieno-[3,2-b:2′,3′-d]silole)-2,6-diyl-alt-(2,1,3-benzothiadiazole)-4,7-diyl], based bulk hetero-junction organic photovoltaic were investigated from room temperature (RT) to 145 °C to evaluate its applications in harsh environments.…
We study the spatiotemporal dynamics of a crack front propagating at the interface between a rigid substrate and an elastomer. We first characterize the kinematics of the front when the substrate is homogeneous and find that the equation of motion is intrinsically nonlinear. We then pattern the substrate with a single…
We have recently developed an optimized multi-spin echo (MSE) sequence dedicated to perfluorooctyl bromide (PFOB) imaging yielding an excellent sensitivity in vitro. The aim of the present study was to apply this sequence to quantitative measurements in the mouse liver and spleen after intravenous (i.v.) injection of…
Dense and uniform arrays of InP-based nanopillars were fabricated by dry etching using self-assembly of colloidal silica particles for masking. The pillars, both single and arrays, fabricated from epitaxially grown InP and InP/GaInAsP/InP quantum well structures show excellent photoluminescence (PL) even at room tempe…
Tungsten-doped anatase was prepared by a thermal hydrolysis of aqueous solutions of peroxo complexes of titanium and tungsten. The synthesized samples included X-ray diffraction, high-resolution transmission electron microscopy, selected area electron diffraction, Raman spectroscopy, specific surface area, and porosit…
The greater variability in the electrical properties of n-type metal-oxide-semiconductor field-effect transistors (MOSFETs) compared with those of p-type MOSFETs poses problems for scaling of silicon based large-scale integration technology. We have elucidated the origin of the variability difference between n- and p-…
Weg von der Oberfläche: Nanopartikel (NPs) aus 16 nm großen Au-Kernen und Pd-Schalen unterschiedlicher Dicke katalysieren Suzuki-Miyaura-Kreuzkupplungen in Wasser bei Raumtemperatur. NPs mit einer Schalendicke von 2–5 Pd-Monoschichten sind katalytisch am aktivsten. Die Katalyse resultiert wohl aus dem Austritt von Pd-…
Made visible: In situ visualization of the RBL receptor on cancer cell line surfaces was developed by using biotinylated rhamnose and chacotriose bound to quantum dots. The RBL receptor showed different expression patterns on various cell lines. Also, solasodine rhamnosides were found to kill cancer cells more effecti…
As the simplest and most prevalent motif of protein folding, α-helix initiation is the starting point of macromolecular complexity. In this work, helix initiation was directly measured via ultrafast temperature-jump spectroscopy on the smallest possible helix nucleus for which only the first turn is formed. The rate's…
BACKGROUND: Mitochondrial 2-oxoglutarate (α-ketoglutarate) dehydrogenase complex (OGDHC), a key regulatory point of tricarboxylic acid (TCA) cycle, plays vital roles in multiple pathways of energy metabolism and biosynthesis. The catalytic mechanism and allosteric regulation of this large enzyme complex are not fully…
Nanoparticles of (Zr 0.8 Sn 0.2 )TiO 4 ( ZST ) ceramics were prepared by ball milling. Different concentrations of (1, 2 and 3 wt%) nanoparticles of size about 60 nm were introduced into the sub micron‐sized (0.8 μm) powder of the ZST ceramics to study the effect of their inclusion on densification, microstructure, an…
Abstract New experimental results using different prestrains and different recovery durations highlight an efficient metallurgical route to produce single phase steels with high combination between yield stress and strain‐hardening. This is achieved by exploiting the thermal stability of mechanically induced twins in…
Four new azolium-containing metal–organic frameworks (MOFs) have been synthesized, where the azoliums are potential organocatalyst precursors. Modifying the number of azoliums on a standard biphenyl dicarboxylate strut affects the morphology or the degree of interpenetration in two representative types of MOFs: NbO-ty…
We investigated the formation mechanism of transmission microwave frequency (TMF) spectrum of cut-off probe using a simple circuit model to elucidate the physics behind the TMF spectrum. The result showed that the overall shape of the TMF spectrum of cut-off probe (N – shape spectrum) is well reproduced with our propo…
Understanding how electric fields and their fluctuations in the active site of enzymes affect efficient catalysis represents a critical objective of biochemical research. We have directly measured the dynamics of the electric field in the active site of a highly proficient enzyme, Δ(5)-3-ketosteroid isomerase (KSI), i…