Materials Literature
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Self-assembled monolayers (SAMs) have been widely used to engineer the electronic properties of substrate-supported graphene devices. However, little is known about how the surface chemistry of SAMs affects the interfacial mechanical properties of graphene supported on SAMs. Fluctuations and changes in these propertie…
The study deals with upgrading of a poly (ɛ‐caprolactone) (PCL)‐based biodegradable material using graphite nanoplatelets‐aided in‐situ formation of reinforcing microfibers, that is, preparation of a microfibrillar composite (MFC) based on the PCL/poly lactic acid (PLA) 80/20 blend. Recently, we have found that effect…
Abstract We describe the capability of a high‐resolution three‐dimensional digital image correlation (DIC) system specifically designed for high strain‐rate experiments. Utilising open‐source camera calibration and two‐dimensional DIC tools within the MATLAB framework, a single camera three‐dimensional DIC system with…
One of the most common methods of carbon nanotubes (CNTs) synthesis is application of an electric-arc plasma. However, the final product in the form of cathode deposit is composed of carbon nanotubes and a variety of carbon impurities. An assay of carbon nanotubes produced in arc discharge systems available on the mar…
ABSTRACT Polycarbonate (PC) is an engineering thermoplastic with excellent insulation and mechanical properties. However, the low thermal conductivity restricted its application in electronic devices. Hexagonal boron nitride ( h ‐BN) microparticle, a promising material with high thermal conductivity, was functionalize…
H‐ZSM‐5 was modified with transition metals (including Fe, Cu, Mn, and Co) by homogeneous deposition precipitation (HDP) method and tested as catalyst for the selective reduction of NO with ammonia (NH 3 ‐SCR). The selectivity to N 2 was higher than 95% in all the nanocatalysts and the NO conversion over nanocatalysts…
The liquid crystalline behavior of graphene oxide (GO) has enabled the design of facile and effective solution processing methods for assembling highly ordered macroscopic graphene structures, further expanding the development of novel graphene‐based devices. In this progress report, first the preparation of liquid cr…
Single therapy approaches are usually insufficient to treat certain diseases, due to genetic differences between patients or disease resistance. Therefore, such approaches are gradually replaced by combination therapies comprising two or more drugs. In oncology, these include BRAF inhibitors and cytotoxic, antiangioge…
Several lanthanide bis(salicylato)borate (BSBs) compounds were synthesized from anhydrous lanthanide chlorides and pyridine (py). The reactions start with the formation of small complexes, as indicated by [ErCl 2 (py) 4 (BSB)], on to 1D polymers 1 ∞ [Ln(BSB) 3 (py) 2 ] (Ln = Y, La–Nd, Sm) with a reduced py content. As…
The influence of the composition of stainless steels on atmospheric corrosion resistance in a marine environment in Dubai was investigated after 2 y and 4 y of exposure. Different stainless steel grades with different surface finishes were included in the investigation: three ferritic stainless steels, five austenitic…
Abstract The development, design and the performance evaluation of rare-earth doped host materials is important for further optical investigation and industrial applications. Herein, we successfully fabricate KLu 2 F 7 upconversion nanoparticles (UCNPs) through hydrothermal synthesis by controlling the fluorine-to-lan…
Conversion coatings are expected to provide high corrosion protection and to be environmentally friendly at the same time. The aim of this study was to investigate rare earth (cerium and lanthanum) nitrate and chloride conversion coatings deposited on aluminum alloy AA7075-T6. Individual Ce and La nitrate and chloride…
Formation energies, electronic and optical properties of pure ZnO, and Er-doped ZnO with and without incorporating the intrinsic point defects (IPDs) were studied by the first-principles method based on density functional theory. The results indicated that stable Er-doped ZnO compound can only exist under Zn-poor and…
In this work, by employing field transformation optics, we deduce a special kind of materials called conjugate metamaterials, which can support intriguing electromagnetic wave propagations, such as negative refractions and lasing phenomena. These materials could also serve as substrates for making a subwavelength-reso…
A series of poly(9,9-di- n -octyl-fluorene-2,7-vinylene)s (PFVs) containing metalloporphyrins at the chain ends with different conjugation lengths (ca. average 8 or 24 FV repeat units), PFV-[Por(M)] 2, have been prepared by olefin metathesis of the vinyl chain ends in PFVs (prepared by acyclic diene metathesis polymer…
Recently, there has been great interest in "ultrastable" glasses formed via vapor deposition, both because of emerging engineering applications of these materials (e.g., active layers in light-emitting diodes and photovoltaics) and, theoretically, as materials for probing the equilibrium properties of glassy materials…
A novel approach for the in situ synthesis of conjugated polyaniline-poly(ethylene glycol) graft copolymer (PA- g -PEG) by the combination of oxidative polymerization and copper catalyzed azide–alkyne cycloaddition (CuAAC) click reaction is described. The method pertains to the reduction of the CuBr 2 catalyst during…
Abstract Soil vestiges might provide information about a crime scene. The Rietveld method with X‐ray diffraction data ( RM ‐ XRD ) is a nondestructive technique that makes it possible to characterize minerals present in the soils. Soil clays from the metropolitan region of Curitiba (Brazil) were submitted to DCB treat…
Ba1−xCaxTi0.9Zr0.1O3 (x = 0.10, 0.15, 0.18) solid solutions were synthesized by the conventional solid-state method. A perovskite-type structure was determined using the X-ray diffraction (XRD) technique. The addition of Ca2+ reduced the grain size (22.6, 17.9 and 13.3 μm, respectively) for all well-sintered ceramics…
Abstract A green and fast methodology was developed to synthesize silver nanoparticles using rosemary essential oil (EO) as a renewable reducing agent. The synthesis process was microwave (MW) assisted, using a coaxial dipole antenna immersed into the reaction medium. This configuration was used to promote both: i) ro…