Materials Literature
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Spotless catalysts: Ligand immobilization was studied by two-photon fluorescence microscopy with a fluorescent nixantphos ligand as probe (see picture). In the immobilization process ligand aggregates form in solution and are deposited on the support, where they appear as bright spots in fluorescence images. Preventin…
Synchrotron X-ray diffraction and neutron diffraction have been used to investigate the phase changes that the titanosilicate mineral sitinakite undergoes when dehydrated. Refinements of the powder diffraction data of the material before and after heating to 573K indicate a phase change from space group P 4 2 / mcm to…
In this paper, we present a detailed study of localized two-photon photoluminescence from metal nanoparticles on a dielectric surface. An ultrafast (∼13 fs) near-infrared laser focused on a micrometer sized region is used to excite a silver nanoparticle covered quartz or mica substrate, and a pulse shaper is used to c…
Abstract With its reputation as a high‐energy density fuel, aluminum hydride (AlH 3 ) has received renewed attention as a material that is particularly suitable, not only for hydrogen storage but also for rocket propulsion. While the various phases of AlH 3 have been investigated theoretically, there is a shortage of…
The influence of chemical bonds formed between a single-walled carbon nanotube (CNT) and a polymer matrix upon the interface behavior has been studied through the development of an interfacial cohesive law. By using the interatomic potential directly, the tensile cohesive stress and cohesive energy for the interface w…
Borate: guilty and charged! The borate ion, and possibly carbonate, enhances rates of steady oxygen-isotope exchanges at some, but not all, structural sites in polyoxometalate ions. Addition of an oxygen atom to an incoming neutral boric acid molecule (blue=boron) from a bridging oxygen atom on a decametalate ion is s…
Abstract The effect of nonsolvent on morphologies of electrospun polyamide 6 (PA6) fibers was reported in this study. An investigation of electrospinning PA6 / formic acid (FA) / dichloromethane (DCM) solutions was conducted, wherein FA was used as solvent and DCM was used as nonsolvent for PA6. It is interesting to n…
NiTi shape memory alloy (SMA) has been studied for many years for its shape memory and pseudoelastic properties, as well as its biocompatibility, which make it suitable for many biomedical applications. However, SMA NiTi is also interesting for relevant wear resistance near the transition temperature which, along with…
A surface-modifier-assisted photodeposition technique for directly depositing PbS quantum dots on mesoporous TiO2 nanocrystalline films is developed (see figure). The addition of mercaptoacetic acid (MAA) drastically increases the photodeposition rate and significantly blueshifts the absorption edge. The PbS particle…
Co‐doped ZnO nanorods (Zn 1− x Co x O) with x =0.05, 0.1, and 0.2 were successfully grown on indium‐doped tin oxide glass substrates via a wet chemical route at 70°C for 10 h. The effect of Co‐doping level on the morphology, crystalline phases, optical, and magnetic properties of the ZnO nanorods was studied. Based on…
UNLABELLED: Conserved primers across multiple species and simultaneously specific for a certain isozyme can be rare and difficult to find. PrimerIdent was developed aiming to automate this primer design and selection process in a given nucleotide sequence alignment, providing an intuitive, easy to interpret graphical…
Abstract After polyglycerol polyglycidyl ether (PGPE) and glycerol polyglycidyl ether (GPE) were mixed with tannic acid (TA) in ethanol and without solvent at epoxy/hydroxyl ratio 1/1, the obtained GPE‐TA and PGPE‐TA solutions were mixed with wood flour (WF), prepolymerized at 50°C, and subsequently compressed at 160°…
A simple, one-pot and controllable strategy is reported in this contribution for biomimetic synthesis and self-assembly of gold nanoparticles (Au-NPs). It involves our synthesized polyaldehyde dextran (PAD), which has been proved to be a biomacromolecule with excellent biocompatibility and biodegradability, acting as…
Die direkte Anellierung von Pyrensystemen an Diporphyrine liefert Pyren-Diporphyrin-Hybridverbindungen (C(Pyren) rot, C(Porphyrin) dunkelblau, N hellblau, Zn grün) mit einer Nahinfrarot(NIR)-Absorption bei Wellenlängen, die für die Telekommunikation wichtig sind. Außerdem erreichen sie eine der höchsten externen Quant…
Two major requirements for a tissue-engineered vessel are the establishment of a continuous endothelium and adequate mechanical properties. In this study, a novel tubular collagen scaffold possessing nanopatterns in the form of channels (with a 650 nm periodicity) on both sides was designed and examined after seeding…
The thermal conductivity at (220 to 480) K of anodic alumina film of (1.4 to 5) μm thick and about 30 % porosity, which is grown from aluminum foil, is reported. A laser flash technique was employed to carry out measurements of thermal diffusivity of layered anodic aluminum specimen, while the effective thermal conduc…
Tuning of the localized surface plasmon resonance (LSPR) of nanoporous metals is at the heart of manipulating light within extremely small volumes for the implementation of optical devices at the nanoscale. In this work, nanoporous gold-alumina core-shell films with fixed gold skeletons and different thicknesses of al…
Abstract A series of 3D polyoxometalate (POM) based coordination polymers, namely, Ln 4 (pdc) 4 [SiW 12 O 40 ] · x H 2 O (Ln = Eu, Gd, Tb, Dy; x = 19, 13, 14, 18; H 2 pdc = pyridine‐2,6‐dicarboxylate), have been hydrothermally synthesized and characterized by elemental analyses, IR spectroscopy, thermogravimetric anal…
The cyclohexane-igepal inverse microemulsion, comprehensively established for the synthesis of silica nanoparticles in an ammonia-catalyzed sol-gel process, was alternatively studied with an acid-catalyzed sol-gel process. Tetraethyl orthosilicate (TEOS) was used as the silica precursor, while two different aqueous ph…
We report the first comprehensive high-resolution angle-resolved photoemission measurements on CeFeAsO, a parent compound of FeAs-based high temperature superconductors with a magnetic-structural transition at $\ensuremath{\sim}150\text{ }\text{ }\mathrm{K}$. In the magnetic-ordering state, four holelike Fermi surface…