Materials Literature
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Abstract Polypropylene (PP)/organomodified layered double hydroxide (LDH) nanocomposites were prepared in order to examine the influence of LDH content on thermal, mechanical, and rheological properties. The nanostructure examinations by X‐ray diffraction (XRD) and transmission electron microscopy (TEM) confirmed the…
It has been a long-lasting challenge to prepare highly ordered biopolymer nanocomposites to optimize or tune the desired mechanical and barrier properties of the nanocomposite film. In this study, we developed a simple and cost-effective method to synthesize highly ordered zein nanocomposites. The method involved the…
Vereinigte Sulfate: Das einzigartige Tetrasulfat-Anion S3O132− konnte in der Struktur von (NO2)2[S4O13] beobachtet werden, die sich in der Reaktion von N2O5 mit SO3 bildet. Theoretische Untersuchungen zeigen, dass das Anion ein stabiles Mitglied der Polysulfatfamilie [SnO3n+1]2− ist, die bis zu n=11 untersucht wurde.
The Mott insulator-metal transition induced by an external stimulus such as electric field, pressure, chemical doping, or photoirradiation has received considerable attention because of the potential use in new optoelectronic functional devices. Here we report an abrupt Mott insulator-metal transition observed as a cu…
An important and so far neglected class of structural elements affecting the overall properties of metal oxide nanopowders are interfaces between individual nanocrystals. In this work, we show experimentally that these defects inside a powder of compressed MgO nanocubes are subject to photoexcitation in the UV light r…
The aerobic oxidation of primary amines to their respective nitriles has been carried out at room temperature using a highly reusable nanocrystalline ruthenium oxide pyrochlore Nafion composite catalyst (see figure).
Sulfates united: the unique tetrasulfate S(4)O(13)(2-) anion was observed in the structure of (NO(2))(2)[S(4)O(13)] that forms in the reaction of N(2)O(5) with SO(3). Theoretical investigations show that the anion is a stable member of the polysulfate series [S(n)O(3n+1)](2-), which was investigated up to n=11.
Abstract A new approach for the calculation of static and dynamic hyperpolarizabilities in the framework of auxiliary density perturbation theory is derived. It takes advantage of the Wigner's 2 n +1 rule. As a byproduct dynamic quadratic response equations are obtained. Even though the final equations are similar to…
The energetics of an Au adatom and Au${}_{N}$ clusters $(N=2\text{--}6)$ supported on pristine and reduced MgO(100) surfaces is analyzed using an all-electron full-potential density functional theory approach. A hierarchy of exchange-correlation functional approximations is employed, ranging from the generalized gradi…
A novel CO(2) solid sorbent was prepared by synthesizing and modifying AlOOH-supported CaAl layered double hydroxides (CaAl LDHs), which were prepared by using mesoporous alumina (γ-Al(2)O(3)) and calcium chloride (CaCl(2)) in a hydrothermal urea reaction. The nanostructured CaAl LDHs with nanosized platelets (3-30 nm…
Abstract Al‐doped ZnO (AZO) films were prepared on glass substrates by RF magnetron sputtering in an Ar + 5%H 2 ambient at room temperature. The influence of film thickness (85–1101 nm) on the structural, electrical, and optical properties of the films was investigated. With increasing film thickness, it is found that…
The book "The Transmission Electron Microscope" contains a collection of research articles submitted by engineers and scientists to present an overview of different aspects of TEM from the basic mechanisms and diagnosis to the latest advancements in the field. The book presents descriptions of electron microscopy, mod…
Electrospinning micro- and nanofibers are being increasingly investigated for drug delivery. The components and their stimuli-responsive properties of fibers are important factors influencing the drug release behavior. The aim of this study is to fabricate thermoresponsive poly(N-isopropylacrylamide) (PNIPAAm)/poly(2-…
In Fe-Pd alloys, the competing geometric (fcc versus bcc) and magnetic tendencies result in rich phase stability and ordering physics. Here, we study these alloys via a first principles mixed-basis cluster expansion (CE) approach. Highly accurate fcc and bcc CEs are iteratively and self-consistently constructed using…
The hydrogen spillover mechanism has been discussed in the field of hydrogen storage and is believed to have particular advantage over the storage as metal or chemical hydrides. We investigate conditions for practicality realizing the hydrogen spillover mechanism onto carbon surfaces, using first-principles methods. O…
Herein, we report an ambient synthesis of CdS QDs with widely tunable particle size by sulfur source of H 2 S and a new capping agent R-2-thiotetrahydrothiazole-4-carboxylic acid in situ produced from the reaction of l -cysteine with carbon disulfide in water. XRD, FTIR, UV–vis, PL, and TEM measurements were used to c…
Plasma expanders such as dextran and hydroxyethyl starch (HES) are important components of solutions designed to maintain vascular volume in the clinical setting and to preserve organs ex vivo before transplantation. Here, we show that these polymers also exert stabilizing effects on engineered microvessels in microfl…
This paper reports the effects of substrate temperature on the microstructural characteristics and electrical properties of p -type semiconducting NiO thin films grown on (0001) Al 2 O 3 substrates. NiO thin films were biepitaxially grown on (0001) Al 2 O 3 substrates by radiofrequency magnetron sputtering, and they s…
A new calix[4]azacrown is synthesized from 1,3-dipropynyloxycalix[4]arene in a good yield of 85% and was modified on a silicon surface via click chemistry to be a switchable wettability sensor for ion pairs ([C(4)mim]Cl). A cooperative mechanism involving supramolecular interactions is proposed.
The dynamics of a simple rigid pseudoglobular molecule (2-adamantanone) has been studied by means of dielectric spectroscopy and examined under the constraints imposed by the space group of the crystal structure determined by x-ray powder diffraction. The low-temperature monoclinic structure of 2-adamantanone, with on…