Materials Literature
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Boron carbide and silicon oxide (BCSiO) hetero-nanonecklaces have been successfully synthesized via temperature modulation. This kind of nanostructure was formed by coating 100−500 nm silicon oxide nanoballs onto 20−30 nm boron carbide nanowires. Synthetic analysis shows that a two-step model at different temperatures…
Using the recently discovered time-dependent spin-orbit-photon interaction operator and first order perturbation theory, the rate of spontaneous emission from triplet excitations is derived within the two-level approximation for organic molecular solids and conjugated polymers. The calculated rates and corresponding r…
Abstract We have developed a novel strategy for the preparation of ion‐bonded supramolecular star polymers by RAFT polymerization. An ion‐bonded star supramolecule with six functional groups was prepared from a triphenylene derivative containing tertiary amino groups and trithiocarbonate carboxylic acid, and used as t…
Of the three superfamilies of Ostracoda present in fresh water, only the Cytheroidea had thus far no records in terrestrial environments. Here, we report on a new genus and species, Intrepidocythere ibipora n. gen. n. sp., of the ostracod superfamily Cytheroidea, from forest leaf litter in São Paulo State, Brazil. Jud…
A more computationally tractable model of the kinoform lenses in hybrid refractive-diffractive systems is proposed by taking into consideration the actual phase function of the kinoform lenses for every wavelength. The principle and outline of this modified model are explained. We compare the results of this approach…
[Ni( salen)] complexes bearing different crown ether receptors were electropolymerized to give films whose voltammetric signatures responded to Ba2+. In line with DFT calculations, X-ray absorption spectroscopy (XAS) near the Ni K-edge showed the nickel local environment in the monomers and their corresponding polymer…
In this paper, a kink model for gas separation is presented. Transport of pure nitrogen, oxygen, and their mixture in single-walled carbon nanotubes (SWCNTs) with a kink formed by bending is studied using molecular dynamics simulations. The results show that a nanotube with a specified kink results in transport resist…
The indirect detection of 14N spectra via protons in the manner of heteronuclear multiple-quantum correlation (HMQC) allows one to obtain single- (SQ) and double-quantum (DQ) 14N spectra in solids. A comparison of the SQ and DQ line widths as a function of temperature with simulations reveals motions in the tripeptide…
Abstract A systematic investigation is reported into the influence of the counter cations on the optical, electrical and electroluminescent properties of polyelectrolytic conjugated polymers and of their cyclodextrin‐threaded rotaxanes. We compare conjugated polyelectrolytes with sulfonated side groups where the anion…
At present, natural limestone is used for the desulphurization of waste gases from the combustion of fossil fuels. However, it is important to save all primary resources, such as limestone, for the future. The researchers focused on finding alternative sorbents for the purpose of desulphurization in a dry additive met…
A total of 10 steroidal glycosides, together with three new spirostanol glycosides (6-8), a new furostanol glycoside (9), and a new cholestane glycoside (10), were isolated from the rhizomes of Clintonia udensis (Liliaceae). The structures of the new compounds were determined on the basis of extensive spectroscopic an…
Abstract The skin is sensitive to temperature change and the effect may not be significant while the temperature at the surface is below 44°C. However, higher surface temperatures (above 44°C) will further incur time burning and carbonization so that irreversible damage may happen. An investigation of the heating inte…
Abstract A novel 2‐oxazoline‐benzoxazine (POB) was synthesized with 2‐(hydroxylphenyl)‐2‐oxazoline, 1,3,5‐triphenylhexahydro‐1,3,5‐triazine and paraformaldehyde. The chemical structure of the monomer was confirmed by FTIR, 1H‐NMR, 13C‐NMR, and MS. The curing behavior of the monomer was studied by DSC and FTIR, and the…
We present an analysis of the directionally dependent x-ray structure factors (and, hence, intensities) predicted by nonequilibrium molecular dynamics simulations of statically compressed and shocked single crystals of copper, and comment on the feasibility of using experimentally measured intensities to infer tempera…
We consider the lattice Domb–Joyce model at a value of the coupling for which scaling corrections approximately vanish and determine the universal scaling functions associated with the osmotic pressure and the polymer size for semidilute polymer solutions (c/c∗≤10, where c is the concentration of the solution and c∗ i…
Highly enhanced nonlinear absorption cross section values of C60(>DPAF-C2M), C60(>DPAF-C9), and C60(>DPAF-C10) dyads were detected up to 5400, 9700, and 14000 GM, respectively, in the 2.0 ps region in toluene at the concentration of 1.5 x 10(-3) M. They were correlated to a trend showing higher efficiency in light tra…
The electron injection dynamics of dye-sensitized TiO 2 -based solar cells have been investigated to determine the effects of replacing the I 3 − /I − redox system by non-redox-active supporting electrolytes. TiO 2 films were sensitized with Ru(dcbpy) 2 (NCS) 2, where dcbpy = 4,4′-dicarboxylic acid-2,2′-bipyridine (th…
We study the field dependence of the maximum current ${I}_{m}(H)$ in narrow edge-type thin-film Josephson junctions. We calculate ${I}_{m}(H)$ within nonlocal Josephson electrodynamics taking into account the stray fields. These fields affect the difference of phases of the order parameter across the junction and ther…
Self-assembled In 2 O 3 nanosheet networks and flowerlike nanoarchitectures, as well as single In 2 O 3 nanosheets, have been grown in situ on indium substrate by heating indium grains at 900−950 °C under the flow of O 2 in the presence of a small quantity of P 2 O 5 . The as-synthesized In 2 O 3 nanosheets were chara…
Abstract The reaction of glycerol and citric acid was studied by differential scanning calorimetry (DSC) and thermal gravimetric analysis. Reactions were performed in the DSC with a temperature oscillation of 1°C/min applied while scanning the range of 20–220°C. This modulated technique allowed separation of reversibl…