Materials Literature
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The optical properties of Yb3+/Ho3+ - codoped tellurite glass has been investigated. Upconversion luminescence at the wavelengths of 545 nm (5S2 (5F4) → 5I8) and 654 nm (5F5 → 5I8) in holmium was obtained as a result of energy transfer between Yb3+ and Ho3+ ions. The optimization of the activator content and the conce…
We report the results of a template synthesis of a three-dimensional nanostructured material based on titanium(IV) oxide modified with silver nanoparticles. The chemical composition and structure of the material have been determined by scanning electron microscopy, IR spectroscopy, and X-ray diffraction.
The effect of temperature on the adsorption of lead by an activated carbon from coconut shells is investigated. The pseudo second order equation is applied to the kinetic data obtained at different temperatures in order to determine the adsorption rate constants at these temperatures. Then, the Arrhenius equation is a…
Abstract: The clay and non-clay minerals have been identified by XRD analysis. The non-clay minerals include quartz, crystobalite, orthoclase, microcline, plagioclase, calcite, siderite and dolomite, and the clay minerals include kaolinite (52.39%), illite (36.39%) and illite-smectite mixed layer minerals (11.21%). Ka…
Abstract Understanding and modelling the mechanism of destabilisation of complex and opaque water‐in‐oil emulsions is very challenging. The purpose of our current study is to develop experiments to restrict the number of destabilisation mechanisms that take place in order to better understand their role in the evoluti…
Weakly bound complexes between ferric heme cations and NO were synthesised in the gas phase from ion-molecule reactions, and their absorption measured based on photodissociation yields. The Soret band, which serves as an important marker band for heme-protein spectroscopy, is maximal at 357±5 nm and significantly blue…
In this article, the method of stepwise acidification, gradually charging and ion exchange was employed for synthesizing tungsten vanadium aluminum heteropoly acid catalysts and heteropoly acids-glycine supramolecules. These novel products were further characterized through chemical analysis, IR, UV-Vis absorbance spe…
The primary role of yeast Ara1, previously mis-annotated as a D-arabinose dehydrogenase, is to catalyze the reduction of a variety of toxic α,β-dicarbonyl compounds using NADPH as a cofactor at physiological pH levels. Here, crystal structures of Ara1 in apo and NADPH-complexed forms are presented at 2.10 and 2.00 Å r…
It was recently reported, that heterostructures of para-hexaphenyl (p-6P) and α-sexithiophene (6T) deposited on muscovite mica exhibit the intriguing possibility to prepare lasing nanofibers of tunable emission wavelength. For p-6P/6T heterostructures, two different types of 6T emission have been observed, namely, the…
We investigated the adsorption and thermal evolution of acetylene on clean Pd(100) and Pd(100) precovered with 0.25 ML oxygen. The measurements were performed in situ by fast XPS at the synchrotron radiation facility BESSY II. On Pd(100) acetylene molecularly adsorbs at 130 K. Upon heating transformation to a CCH spec…
By the introduction of oxalate as the second ligand, five new lanthanide oxalatophosphonate hybrids with a 2D layered structure, namely, [Ln(H2L)(C2O4)(H2O)]·2H2O [Ln = Nd (1), Sm (2), Eu (3), Tb (4), Dy (5), H3L = H2O3PCH2NCH2(CH2CH2OPO2H)], have been hydrothermally synthesized and structurally characterized by X-ray…
In the present work, significantly various structures connected by Al-O/OH/acetate-Al bonds were synthesized in a versatile sol-gel route. The various bond systems result in several three-dimensional (e.g., fibrous, highly porous, and compact) macrostructures. The shared acetate and OH ions provide the fibrous charact…
In TiO2 nanoparticle based dye sensitized solar cells (DSSC), the electron injected from the dye has to cross multiple interparticle boundaries in random directions before reaching the electrode. For application in DSSCs, the directional pathway for electron transport through the nanotubes is known to reduce the recom…
Angle‐resolved polarized transmission spectra of thin‐film opals are studied experimentally and theoretically as a function of the azimuthal rotation of the plane of incidence at different angles of light incidence. In such 3‐dimensional lattices, the refraction acquires the form of diffraction orders, each with a dis…
We consider a toy model that captures the short-time nondiffusive behavior seen in many physical systems, to study the extraction of self-diffusivity from particle trajectories. We propose and evaluate a simple method to automatically detect the transition to diffusive behavior. We simulate the toy model to generate d…
Isocyanate terminated polyurethane prepolymer, a base material for water curable polyurethane bandage was prepared from diphenylmethane diisocyanate and poly (propylene oxide) glycol. In polyurethanes, the diisocyanate act as hard segment and provides dimensional stability, whereas the polyol which forms the soft segm…
This paper presents a detailed study of the effect of the fluorescence of bulk substrates on the fluorescence intensity of vanadium nanofilms of various thicknesses and examines vanadium K α fluorescence enhancement by emission from the substrate. We calculate correction coefficients that take into account film-substr…
Abstract A mathematical model is discussed in terms of moisture transfer during the drying process of Masson pine (Pinus massoniana) lumber in industrial practice. The model was validated by comparing the simulated result of moisture distribution with experimental data. In the model, the wood drying process was divide…
Abstract A very thin (250 nm), highly conductive (annealed), non‐texturized DC‐sputtered aluminum‐doped zinc oxide layer (ZnO:Al) deposited on a textured glass is used as substrate for thin‐film silicon solar cells. Compared to the classical approach, where wet‐chemically texturized ZnO:Al on planar glass is used, thi…
Advances in nanofabrication have allowed the production of new and more reproducible substrates for the Raman detection of trace antimicrobials in water. The superior substrate uniformity combined with the ability to control surface morphology represents a significant step forward in the design of substrates with impr…