This work is aimed at finding and developing new ways to improve and optimize the characteristics of transparent conductive electrodes based on SWCNT by forming a texture in a continuous layer by ...combination of lithography and oxygen plasma treatment. A theoretical and an experimental justification for choosing thickness of a textured pattern, together with the experimental results of optical and electrophysical measurements were presented. The resistance of the textured electrode was 187.5 Ohm/sq, which is 17.5% lower than resistance of the electrode made from a continuous SWCNT layer with a same transparency of 95%. An analytical calculation showed that the use of extremely absorbing SWCNT films for texturing allows to obtain ∼ 54% gain in the resistance of a textured electrode compared to a continuous SWCNT's layer.
The anodes based on the nickel oxide and yttria-stabilized zirconia are developed by the method of hybrid inkjet 3D-printing with laser treatment. The granulometric composition of the NiO/Zr
0.9
Y
...0.1
O
2
-composite and the rheological characteristics of its based printing pastes are determined. The printing of three-dimensional test objects using the developed ceramic paste is studied experimentally. The influence of the pore formers—graphite and potato starch—added to the paste composition on the rheological characteristics of the paste is studied. The obtained samples of supporting anodes were studied by a complex of physicochemical methods to determine their morphological and structural characteristics.
This work aims at creating a reserve for increasing the efficiency of nuclear power plants. One of the main ways to intensify heat transfer in fuel assemblies is to increase the permissible mass ...concentration of the vapour phase. It is known that the introduction of a gas phase into a fluid flow leads to a modification of the flow structure and can significantly change the key thermal and hydraulic flow parameters, for example, the heat transfer coefficient. In this paper, we present the results of an experimental study of an ascending bubble flow in a vertical rods bundle 3X3. The working liquid was distilled water. The experiment was carried out at Reynolds numbers from 4000 to 11000 and gas flow rate ratios from 3 to 10%. As a result of the experiment, the heat transfer coefficients from the central rod heated by the electric current to the flow have been determined. It is shown that gas bubbles have the greatest effect on heat exchange at low Reynolds numbers and at a maximum distance from the spacer grid.
Abstract
In this paper, the theoretical study of LED based on GaN NWs with carbon nanotubes (CNT) top contact has been presented. The main electrical and optical characteristics of LED have been ...numerically calculated. In a 0.5 x 0.5 mm NWs array, the Ohmic losses in CNTs were 2.7% with an operating current density of 50 A/cm
2
. It proves the possibility of using CNTs as transparent contact.
•Seven organotin compounds based on diclofenac and aspirin (NSAIDs) were synthesized.•The molecular structures of three complexes were determined by XRD analysis.•Cytotoxicity on cancer cell lines ...depends on the coordination number of Sn, the nature of substituent at sn atom and its lipophilicity.•Triphenyltin derivative with diclofenac demonstrates the highest cytotoxicity and significantly induces apoptosis of HCT-116 cells.
Two series of organotin (IV) complexes based on diclofenac L1Na and aspirin L2H of formulae Me3SnL1 (1); Ph3SnL1 (2); Bu2Sn(L1)2 (3); R2Sn(L1)2 (4, R = 3,5-di-tert-butyl-4-hydroxyphenyl); Me3SnL2 (5); Me3Sn(2-hydroxybenzoate) (6) and Me2Sn(L2)2 (7) were synthesized and characterized by 1H, 13C, 119Sn NMR, IR, ESI-MS and elemental analysis. It was found by X-ray diffraction analysis of compound 1 that carboxyl group of diclofenac binds two tin atoms each being in the trigonal bipyramid geometry and having coordination number 5. Compounds 6 and 7 were found to be monomers in the solid state with tetrahedron and octahedron geometry around Sn center, respectively. Cytotoxicity in vitro of compounds 1–7 and initial ligands was evaluated on human colon cancer (HCT-116), human breast cancer (MCF-7) and adenocarcinomic human alveolar basal epithelial (A-549) cells. The IC50 values varied in 0.17–200 µM range for compounds 1–4 and in 3.3–200 µM range for compounds 5–7 depending on the substituents at Sn center and ligand structure. It was found that compound 2 possesses the maximal cytotoxic activity and significantly induces apoptosis of HCT-116 cells.
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Novel organotin complexes with NSAIDs were synthesized. The in vitro antitumor activity of the complexes against human cancer cells was studied. High cytotoxicity was demonstrated.
Abstract
The length of single-walled carbon nanotubes (SWCNTs) affects the optoelectronic and mechanical properties of macroscopic SWCNT layers. Modern methods are capable to measure the length of ...short nanotubes, and also require complex sample preparation procedures. In this work we show that the average length of SWCNTs can be estimated by measuring the resistance of randomly oriented SWCNTs array. We observe the change in the slope of the resistance dependence on the distance between the contacts with the interval between 100 and 200 μm. The change of resistance slope indicates a change in the path of current flow through the SWCNT. The change in the conduction path can be associated with the “effective bundle length”, which should be related to the average nanotube length. Thus, we have demonstrated a simple and quick technique to measure SWCNT bundle length, which can be used in-situ and does not require special sample preparation.
An improved measurement of the decay $B^0_S$ → $μ^+μ^-$ and searches for the decays $B^0$ → $μ^+μ^+$ and $B^0_S$ → $μ^+μ^-γ$ are performed at the LHCb experiment using data collected in proton-proton ...collisions at $\sqrt{s}$ = 7, 8 and 13 TeV. corresponding to integrated luminosities of 1, 2 and 6 fb-1, respectively. The $B^0_S$ → $μ^+μ^-$ branching fraction and effective lifetime are measured to be $\mathscr{B}$($B^0_S$ → $μ^+μ^-$) = (3.09$^{(+0.46+0.15)}_{(-0.43-0.11)}$) x 10-9 and $τ(B^0_s →μ^+μ^-)$ = (2.07 ± 0.29 ± 0.03) ps, respectively, where the uncertainties include both statistical and systematic contributions. No significant signal for $B^0$ → $μ^+μ^-$ and $B^0_S$ → $μ^+μ^-γ$ decays is found and the upper limits $\mathscr{B}$($B^0$ → $μ^+μ^-$) < 2.6 x 10-10 and $B^0_S$ → $μ^+μ^-γ$ < 2.0 x 10-9 at 95% confidence level are determined, where the latter is limited to the range $m_{μμ}$ > 4.9 GeV/c2. Additionally, the ratio between the $B^0$ → $μ^+μ^-$ and $B^0_S$ → $μ^+μ^-$ branching fractions is measured to be $\mathscr{R}_{μ+μ-}$ < 0.095 at 95% confidence level. The results are in agreement with the Standard Model predictions.
We present an angular analysis of the B^{+}→K^{*+}(→K_{S}^{0}π^{+})μ^{+}μ^{-} decay using 9 fb^{-1} of pp collision data collected with the LHCb experiment. For the first time, the full set of ...CP-averaged angular observables is measured in intervals of the dimuon invariant mass squared. Local deviations from standard model predictions are observed, similar to those in previous LHCb analyses of the isospin-partner B^{0}→K^{*0}μ^{+}μ^{-} decay. The global tension is dependent on which effective couplings are considered and on the choice of theory nuisance parameters.
The only anticipated resonant contributions to B^{+}→D^{+}D^{-}K^{+} decays are charmonium states in the D^{+}D^{-} channel. A model-independent analysis, using LHCb proton-proton collision data ...taken at center-of-mass energies of sqrts=7, 8, and 13 TeV, corresponding to a total integrated luminosity of 9 fb^{-1}, is carried out to test this hypothesis. The description of the data assuming that resonances only manifest in decays to the D^{+}D^{-} pair is shown to be incomplete. This constitutes evidence for a new contribution to the decay, potentially one or more new charm-strange resonances in the D^{-}K^{+} channel with masses around 2.9 GeV/c^{2}.
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