Materials Literature
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A variety of substitutions in Tl9BiTe6 and Tl9SbTe6 with Sn and Pb, amounting to 14 different samples, were performed by melting the stoichiometric amounts of elements at 923 K, followed by slow cooling. The pulverized powders were sintered using the hot-pressing technique. All samples were of single phase according t…
The influence of gadolinium on the microstructure and mechanical properties of Mg–9Li–3Al alloy was investigated. Results show that the addition of Gd can effectively refine the α-Mg phase and change the morphology of the α-Mg phase. Meanwhile, the Al 3 Gd phase is mainly distributed at the boundaries of the α-Mg phas…
We report the discovery of extraordinarily large anisotropy fields and strain-tunable magnetocrystalline anisotropy in ${\mathrm{Sr}}_{2}{\mathrm{CrReO}}_{6}$ epitaxial films. We determine the strain-induced tetragonal distortions and octahedral rotations in ${\mathrm{Sr}}_{2}{\mathrm{CrReO}}_{6}$ epitaxial films grow…
The ordering and relative energy splitting between bright and dark excitons are critical to the optical properties of single-walled carbon nanotubes (SWNTs), as they eventually determine the radiative and non-radiative recombination processes of generated carriers. In this work, we report systematic high-field magneto…
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Abstract In order to assess the anisotropy-related uncertainties of relatively determined photoluminescence quantum yields ( Φ PL ) of molecular emitters and luminescent nanomaterials, we compared Φ PL values measured without and with polarizers using magic angle conditions and studied systematically the dependence of…
The anisotropy of the electronic structure of the $\mathit{MAX}$ phase ${\mathrm{Cr}}_{2}\mathrm{AlC}$ has been investigated by electron-energy-loss spectroscopy (EELS) at the C $K$ edge, and x-ray-absorption spectroscopy (XAS) at the Al $K$, Cr ${L}_{2,3}$, and Cr $K$ edges. The experimental spectra were interpreted…
We use objective boundary conditions and self-consistent charge density-functional-based tight-binding to simulate at the atomistic scale the formation of helices in narrow graphene nanoribbons with armchair edges terminated with fluorine and hydrogen. We interpret the microscopic data using an inextensible, unshearab…
Below a critical particle size, some pressurized compounds (e.g. TiO2, Y2O3, PbTe) undergo a crystal-to-amorphous transformation instead of a polymorphic transition. This effect reflects the greater propensity of nanomaterials for amorphization. In this work, a panorama of thermodynamic interpretations is given: first…
The energetics for the interaction of the noble gas atoms with the carbon nanotubes (CNTs) are investigated using an analytical model and density functional theory calculations. Encapsulation of the noble gas atoms, He, Ne, Ar, Kr, and Xe into CNTs of various chiralities is studied in detail using an analytical model,…
Following the discovery of serious errors in the structure of biomacromolecules, structure validation has become a key topic of research, especially for ligands and non-standard residues. ValidatorDB (freely available at http://ncbr.muni.cz/ValidatorDB) offers a new step in this direction, in the form of a database of…
ABSTRACT Scrap rubber reclamation is one of the most desirable approaches to solve the disposal problem of used tires. However, reclaimed tire rubber (RTR) has not gained enough attention due to its poor properties. In this work, the effects of poly(ethylene‐ co ‐vinyl acetate) (EVA) addition and electron beam (EB) ir…
Magnetite (Fe 3 O 4 ) of high quality was prepared by combining atomic layer deposition (ALD) with a subsequent thermal reduction process. The reduction process in hydrogen atmosphere was investigated by in situ x-ray diffraction studies as a function of temperature. A complete reduction to Fe 3 O 4 was confirmed with…
We present a systematic investigation of the optical properties of cluster-assembled TiO2 films (20–150 nm nominal thickness) deposited onto Si wafers and processed with two types of ex-situ oxidation treatments. Spectroscopic ellipsometry (0.7–5 eV energy range), supported by x-ray photoelectron spectroscopy and atom…
Crystallization of a binary porphyrin nanostructure (BPN) of TSPP ( meso -tetra(4-sulfonatophenyl)porphyrin) and TMPyP ( meso -tetra( N -methyl-4-pyridyl)porphyrin) was studied. The morphology and crystallinity of the BPN was investigated using transmission electron (TEM) and atomic force microscopies (AFM). The compo…
Pre-adsorbed branched brush layers were formed on silica surfaces by adsorption of a diblock copolymer consisting of a linear cationic block and an uncharged bottle-brush block. The charge of the silica surface was found to affect the adsorption, with lower amounts of the cationic polyelectrolyte depositing on less ch…
-edge X-ray absorption near-edge structure (XANES), and EPR spectroscopies supports assignment of a diniobium complex, in which one Nb atom carries a single unpaired electron that is not largely delocalized on the second Nb atom. During the oxidative transformation, one electron is removed from the δ-bonding HOMO, whi…
The present paper reports the thermoluminescence (TL) properties of combustion synthesized Ti doped ZrO2 nanophosphors the effect of annealing on TL glow curve was also studied. The structural characterizations were done by X-ray diffraction technique (XRD), composition by Fourier transformation infrared spectroscopy…
Self-assembled conjugated rod-coil block copolymer and its nanocomposites with SWCNT could be used as the charge storage layer for high-performance OFET memory devices.
The synthesis of new styryl dyes derived from 4-pyridine and 4-quinoline and having an ammonioalkyl N-substituent and benzocrown ether moieties of different sizes and with different sets of heteroatoms was developed. Spontaneous "head-to-tail" dimerization of these dyes via the formation of numerous hydrogen bonds bet…