Materials Literature
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We describe a method for predicting detection limits of minority elements in electron energy loss spectroscopy (EELS), and its implementation as a software package that gives quantitative predictions for user-specified materials and experimental conditions. The method is based on modeling entire energy loss spectra, i…
Aniline is oxidized to nitrosobenzene as the initial product, which undergoes further oxidation to nitrobenzene. The nitrosobenzene formation is catalyzed by functionalized multiwalled carbon nanotubes (CNT) followed by a coupling reaction between nitrosobenzene and aniline to produce azobenzene. This coupling require…
The Eu-encrypted Preyssler anion, [EuP5W30O110]n-, demonstrates unusual electronic properties as a function of applied potenial. The Preyssler anion itself, when exchanged with a nonredox active trivalent ion such as La3+, is electroactive in acidic solution, reversibly accepting up to 10 electrons under reducing cond…
The phase contents and morphology of a ZrO 2 fiber coating deposited at 1050°C on Hi‐Nicalon TM by chemical vapor deposition (CVD) were examined as a function of deposition time from 5–120 min. The morphological evolution in the ZrO 2 coating was correlated to the development of delamination within the ZrO 2 coating.…
ZnO films doped with different concentrations of aluminum (AZO) have been prepared by the sol–gel technique. The electrical properties of the samples have been measured on as-deposited films. Two of the films have been heat treated in vacuum at 400 °C to determine the changes in transport properties. The electrical pr…
Application of general behavior principles (GBPs) and consideration of relevant contact modes suggest that only incoherent small-scale fuel coolant interactions (FCIs) with negligible damage potential appear possible with the molten oxide fuel-liquid sodium system as the fuel disperses away from the core into a coolab…
For the first time pressure-volume-temperature (PVT) measurements for the crystal-like smectic E phase have been performed. The phase diagram of 4′-n -octyl-4-isothiocyanatobiphenyl 8BT has been recently established using differential thermal analysis up to 250 MPa. 8BT exhibits a splitting of the clearing line above…
The oxidation of p-toluidine in acetonitrile by hydrogen peroxide is a very slow reaction which produces 4,4'-dimethylazoxybenzene as the product. The presence of functionalized multiwalled carbon nanotubes (CNT) in the above reaction produces 4,4'-dimethylazobenzene. The reactions have been followed by GC/MS, which s…
In the present publication we report on the preparation and spectroscopic features of a penta-coordinate rhodium(III) complex of corrole with bulky ortho-phenyl substituents at the meso positions, Rh ( tdcc )( PPh 3 )[ tdcc = tris (2,6- dichlorophenyl ) corrole ]. Addition of pyridine to Rh ( tdcc )( PPh 3 ), as well…
Microphase separation and morphology of asymmetric diblock copolymer (f = 0.4) thin films confined in a slit with surfaces neutral or attractive towards block A or block B were studied by the cell dynamic system method (CDS). The size effect in CDS calculations was carefully investigated. For asymmetric copolymers, th…
A new method of assessing the magnitude of the magnetic field in a transmission electron microscope using a permanent magnetic material is described. The approach is versatile and simple enough to be implemented for certain scientific or engineering situations in which the exact calibration of the magnetic field in th…
The structure and bonding in oxidized and reduced decatungstate anions have been investigated using density-functional methods. The computational−experimental agreement is good for the geometrical parameters of the oxidized species. The electronic structure of the anions has been probed with molecular-orbital, Mullike…
Des investigations portant sur le genre Diadesmis (Bacillariophycées), observé à l'aide du microscope photonique et du microscope électronique à balayage, ont été réalisées dans différents biotopes des archipels de Crozet et de Kerguelen : lacs, mares temporaires, mousses et sols. Dix espèces ont été recensées. Diades…
Abstract Amorphous silicate sediments comprise most of the upper part of the sedimentary column of the Atlantis II Deep, whereas more crystalline phases are found in the lower part. The objective of this study was to focus on the newly-formed, metastable, hydrothermal phases, that eventually transform into clays or Fe…
The linear triplet structure of SiC3 (with terminal Si) has been investigated using coupled cluster methods, including a perturbative treatment of triple excitations, and Dunning’s correlation-consistent polarized core-valence quadrupole zeta basis set (CCSD(T)/cc-pCVQZ). Based on the demonstrated convergence with res…
We report on the evolution of the Raman-active A g phonon modes in the charge-ordered manganite Pr 0.63 Ca 0.37 MnO 3 as a function of temperature from 300 K to 25 K. Our studies reveal that the linewidths of the A g (2) and A g (4) phonons increase as temperature decreases. This anomalous temperature dependence of ph…
Megakalsilite, KAlSiO4, hexagonal, a 18.1111(8), c 8.4619(4) Å, V 2403.7(2) Å3, c:a = 0.4672, space group P63, Z = 24, R = 0.039 (for 3255 observed reflections collected with a four-circle X-ray diffractometer), is a new mineral species from Mount Koashva, Khibina alkaline massif, Kola Peninsula, Russia. It is of pegm…
The correlation between chemical structure and mesomorphic properties is one of the most important problems in liquid crystals science. 3,5-Disubstituted 1,2,4-oxadiazoles are very convenient model-compounds for studying the dependence of the LC properties on the molecular design. The transition temperatures and diele…
Theoretical studies of β-C3N4 and other crystalline carbon nitride structures indicate that several crystalline phases are metastable, with high bulk modulus values. There are many reports of successful synthesis of some crystalline carbon nitride phases. In spite of questionable data analysis in a significant number…
Abstract Morphological characteristics and mechanical properties of PP‐EP/EVA blends were studied and compared to those of PP/EVA previously reported. For the PPEP/EVA blends, interfacial interactions in amorphous zones, which were associated with shifts in T g , were well defined compared to those of PP/EVA blends, a…