Materials Literature
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Recent years have witnessed many breakthroughs in research on two-dimensional (2D) nanomaterials, among which is hexagonal boron nitride (h-BN), a layered material with a regular network of BN hexagons. This review provides an insight into the marvellous nano BN flatland, beginning with a concise introduction to BN an…
Graphene quantum dots (GQDs) are nanometer‐sized fragments of graphene that show unique properties, which makes them interesting candidates for a whole range of new applications. This review article gives an overview of the synthesis, properties and applications of GQDs. Synthesis methods discussed include top‐down an…
An example of original studies of titanium alloys for medical applications is used to discuss methodical features of analysis of the structural-phase state of metal materials with usage of contemporary methods of analytical scanning and transmission (including high-resolution) electron microscopy. Methods of X-ray ene…
The structure of partially stabilized zirconia crystals is investigated by X-ray diffractometry and transmission electron microscopy. It is shown that the combination of structural methods allowed one to reveal features of the structure and phase composition of these materials. Partially stabilized zirconia has a comp…
Germanium hat's drauf: Sechsfach koordinierte Germanium(IV)-Spezies sind beispiellos aktive und doch kontrollierte Initiatoren der Ringöffnungspolymerisation von rac-Lactid zu Polylactid (siehe Schema).
Structural disintegration or the loss of accessible surfaces of functional nanostructures due to processes involving mass transport (e.g. sintering) is a serious problem for any application of these materials at elevated temperatures, like in heterogeneous catalysis or chemical sensing. Phases with low sintering tempe…
Increase in the use of manufactured nanomaterials (NMs) has led to concerns about the environmental impacts. Especially, hazard of metal-based NMs is more severe due to ions released from surface by water quality parameters and physicochemical properties after entering into the water environment. However, little is kn…
Abstract Die photochemischen Eigenschaften des Indigo, eines weit verbreiteten industriellen Produkts, haben von Anfang an das Interesse von Wissenschaftlern geweckt. Die Photostabilität von Indigo war Gegenstand intensiver Forschungen. In neuerer Zeit wurde vorgeschlagen, dass nach Photoanregung ein intramolekularer…
Anomalous Born dynamical charges in perovskite oxides, such as BaTiO 3 and KNbO 3, are known to be indicators of their tendency to turn polar through cation off-centering and measure of the interaction between d states of transition metal and p states of oxygen. Here, we use first-principles density functional theory…
This paper describes a powerful and versatile approach that combines the benefits of sol-gel processing with controlled phase separation to yield oxide-carbide-carbon or oxide-nitride-carbon nanocomposites.
This paper reports the simultaneous emissions around 1.53, 1.80, 2.10, 2.70 and 3.00 μm in Er 3+ -Ho 3+ — Nd 3+ /Tm 3+ -codoped telluride glasses upon excitation of a conventional 808 nm laser diode. Both emission bands of 1.53 and 2.70 μm were assigned to the transitions of 4 I 13/2 − 4 I 15/2 , 4 I 11/2 − 4 I 13/2 o…
High-temperature slow strain rate testing (SSRT) – ductility data from cathodic hydrogen charging of 10CrMo910 and 7CrMoVTiB1010 are implemented into a mathematical model of stress corrosion cracking (SCC) at various operational conditions including temperatures, pH, and dissolved hydrogen/oxygen contents as well as g…
This work studies the semiconducting behavior of passive films formed on AISI 316L (UNS S31603) in two different sea-water solutions, non-polluted and polluted, collected from the volcano of El Hierro Island. Polarization measurements, potentiostatic passivation tests, electrochemical impedance spectroscopy, and capac…
Photo degradation of organic dyes by pure and doped CdS quantum dots (QDs) prepared by wet chemical route using mercaptoethanol as capping agent has been investigated. Synthesized QDs have been characterized by X‐ray diffraction (XRD) pattern, scanning electron microscopy (SEM), UV–visible, and photoluminescence (PL)…
Ferrocene (Fc) and tetrathiafulvalene (TTF) moieties were incorporated into novel hybrid molecules of structure FcS4TTF(R)2 (R = CF3 and SMe). [FcS4TTF(R)2](•+) exhibited R-dependent spin-density distribution, and [FcS4TTF(CF3)2](••2+) showed the coexistence of Fc-centered Fe 3d and TTF-centered π spins. The solid-sta…
Surface modification by grafting polymers on solid materials is an important strategy used to improve surface properties. This article reports that under appropriate conditions, very thin layers with desired morphologies may be constructed on a plasma-treated substrate by feeding a small quantity of a monomer with a m…
Chitosan/poly(methyl methacrylate-co-butyl methacrylate) (PMMA-co-BMA) blends were prepared via a solution blending method in the presence of formic acid. The compatibility of the bioblends was studied by different methods, such as Fourier transform infrared and Raman spectroscopy, micro-Raman imaging, thermogravimetr…
Chitin is a nontoxic, biodegradable polymer of high molecular weight. It is the most abundant second common polysaccharide found in nature after cellulose. Chitin is a ber, and in addition, it posesses exceptional chemical and biological qualities such as biocompatibility, biodegradability, nontoxicity, and adsorption…
Defects are ubiquitous in carbon nanotubes (CNTs), despite their large formation energies, and have astounding effects on their physicochemical properties. In this study, we employ density-functional theory (DFT) calculations to study systematically the atomic structure, stability, and characteristic vibrations of pri…
P-type cuprous oxide films were prepared by magnetron sputtering with different crystallization degrees from columnar polycrystalline to amorphous phase. The film with amorphous structure possesses a hole concentration of 1.92 × 10 19 cm −3 , even comparable to those of M III - doped Cu 2 O crystalline films and two o…