Materials Literature
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A novel crystalline boron oxynitride (BON) phase has been synthesized under static pressures exceeding 15 GPa and temperatures above 1900 °C, from molar mixtures of B 2 O 3 and h-BN. The structure and composition of the synthesized product were studied using high-resolution transmission electron microscopy, electron d…
Nitrogen‐ and oxygen‐based plasma polymer films are materials with a complex and partially elusive surface chemistry. We present an overview of innovative and established X‐ray photoelectron spectroscopy (XPS)‐based analysis strategies developed to elucidate the surface chemistry of such films. We focus on both experi…
Ionic conductivity in relation to the morphology of lithium-doped high-molecular-weight polystyrene-block-polyethylene oxide (PS-b-PEO) diblock copolymer films was investigated as solid-state membranes for lithium-ion batteries. The tendency of the polyethylene (PEO) block to crystallize was highly suppressed by incre…
We have studied the origin of the exchange bias effect in the ${\text{Au-Fe}}_{3}{\mathrm{O}}_{4}$ dumbbell nanoparticles in two samples with different sizes of the Au seed nanoparticles (4.1 and 2.7 nm) and same size of ${\mathrm{Fe}}_{3}{\mathrm{O}}_{4}$ nanoparticles (9.8 nm). The magnetization, small-angle neutron…
Cathode poisoning, associated with Cr evaporation from interconnect material, is one of the most important degradation mechanisms in Solid Oxide Fuel Cells when Cr2O3-forming steels are used as the interconnect material. Coating these steels with a thin Co layer has proven to decrease Cr vaporization. To reduce produc…
Vertically aligned nanocomposite (VAN) (La0.7Sr0.3MnO3)1−x:(CeO2)x (LSMO:CeO2) thin films have been grown on SrTiO3 (001) substrates by pulsed laser deposition. Tunable magnetoresistance properties as well as microstructures are demonstrated in these VAN films by modulating the film composition (x = 0, 0.3, 0.4, 0.45,…
Poly(ester urea)s (PEUs) derived from α-amino acids are promising for vascular tissue engineering applications. The objective of this work was to synthesize and characterize l -leucine-based PEUs and evaluate their suitability for vascular tissue engineering. Four different PEUs were prepared from di- p -toluenesulfon…
The method of synthesis has a profound influence on the properties of carbon nanostructures endowed with quantum confinement. Here, we report synthesis method of the graphene quantum rings (GQRs) from pitch carbon fiber by a thermal hydrolysis process and their application in optoelectronic devices. Synthesized GQRs w…
We report photovoltaic response of highly transparent graphene/BiFe0.95Si0.05O3 (BFSiO)/ITO/glass derived from bottom-up spin coating technique. The device exhibits short-circuit-current (ISC 0.75 mA) with 1000 fold upsurge and open-circuit-voltage (VOC ∼ 0.45 V) under standard AM 1.5 illumination through graphene. In…
One of the main limitations to the application of gold nanorods (Au NRs) as surface-enhanced Raman scattering (SERS) probes for in situ monitoring of chemical processes is their instability in oxidative environments. Oxidation induces progressive anisotropic shortening of the NRs, which are eventually dissolved once t…
The formation of porous anodic alumina during potentiostatic anodizing of aluminium for times up to 900 s has been investigated using two grades of chromic oxide reagent. The anodic films were examined by ion beam analysis and scanning and transmission electron microscopies. Sulphate impurity in the chromic acid led t…
We studied a finite Fibonacci sequence of Co and Py stripes aligned side by side and in direct contact with each other. Calculations based on a continuous model, including exchange and dipole interactions, were performed for structures feasible for fabrication and characterization of the main properties of magnonic qu…
The tetra α- or β-thiophene substituted metal and metal-free phthalocyanines (Pcs) M[Pc(α-OCH2Thiopen)4] and M[Pc(β-OCH2Thiopen)4] {(α-ThMet-MPc), (β-ThMet-MPc) [ThMet: Thiophene methoxy], M = Zn(II), Co(II) and, 2H} were synthesized from the corresponding 3’-(thiophen-3-ylmethoxy)phthalonitrile or 4’-(thiophen-3-ylme…
Bio/recycled polyols from rapeseed oil (RO) and poly(ethylene terephthalate) (PET) were prepared using a continuous, two-step synthesis method. The bio/recycled polyol properties were compared to RO and commercially available PET based polyols. Rigid polyurethane foams with a unified apparent density of 40—45 kg/m3 we…
The selected lanthanum-strontium-borate glasses were prepared by a conventional melt-quenching technique. The compositions of the investigated glasses were chosen to be: 5.7, 9.5, 14.3, 19.1 mol % for La2O3, 22.9, 19.1, 14.3, 9.5 for mol % SrO and 71.4 mol % for B2O3. The density, molar volume, oxygen molar volume, ox…
Early kinetic intermediates observed during the folding of many proteins are invariably compact and appear to possess some secondary structure. Consequently, it has been difficult to understand whether compaction drives secondary structure formation or secondary structure formation facilitates compaction during foldin…
To create a new series of mechanofluorochromic materials and to elucidate the mechanism of the phenomenon of mechanofluorochromism, 1-alkanoylaminopyrenes including 1-acetylaminopyrene (AAPy), 1-octanoylaminopyrene (OAPy), and 1-stearoylaminopyren (SAPy) were prepared. It was found that these materials exhibited mecha…
Li 6 C 60 is so far the best performing fullerene-based hydrogen-storage material. The mechanism of its reversible hydrogen absorption is not, however, totally known. Here, we report the thermal evolution of Li 6 C 60 upon deuterium absorption up to 330 °C and under 60 bar deuterium gas pressure using in situ high-int…
Herein, we present an interferometric sensor based on the combination of chemically functionalized nanoporous anodic alumina photonic films (NAA-PFs) and reflectometric interference spectroscopy (RIfS) aimed to detect trace levels of enzymes by selective digestion of gelatin. The fabrication and sensing performance of…
Polymorphism and morphology can represent key factors tremendously limiting the bioavailability of active pharmaceutical ingredients (API), in particular, due to solubility issues. Within this work, the generation of a yet unknown surface-induced polymorph (SIP) of the model drug, 5,5-diphenylimidazolidin-2,4-dion (ph…