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51.
Conrad A. P. Goodwin Jing Su Thomas E. Albrecht‐Schmitt Anastasia V. Blake Enrique R. Batista Scott R. Daly Stefanie Dehnen William J. Evans Andrew J. Gaunt Stosh A. Kozimor Niels Lichtenberger Brian L. Scott Ping Yang 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2019,131(34):12050-12050
52.
Shamima Nasreen Matthew L. Baczkowski Gregory M. Treich Mattewos Tefferi Caroline Anastasia Rampi Ramprasad Yang Cao Gregory A. Sotzing 《Macromolecular rapid communications》2019,40(3)
Flexible films having high dielectric constants with low dielectric loss have promising application in the emerging area of high‐energy‐density materials. Here, for the first time, an organometallic, Sn‐polyester‐containing hybrid free‐standing film in polyimide matrix is reported. Polyimide, pBTDA‐HDA, is used with poly(dimethyltin glutarate) and poly(dimethyltin‐3,3‐dimethyglutarate) (pDMTDMG) for having a processable film with tunable dielectric properties. Hybrid film with 60% pDMTDMG and 40% PI (HB2) is found to have improved dielectric features over previously synthesized organic polyimide and organometallic Sn‐polyester homopolymers. These novel organometallic–organic hybrid systems expanded a new area of dielectrics for next‐generation electronics with superior overall electrical performance. 相似文献
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54.
Dr. Anastasia A. Permyakova Dr. Juan Herranz Dr. Mario El Kazzi Justus S. Diercks Dr. Mauro Povia Léa Rose Mangani Michael Horisberger Dr. Alexandra Pătru Prof. Dr. Thomas J. Schmidt 《Chemphyschem》2019,20(22):3120-3127
The encouraging selectivity of copper oxides for the electroreduction of CO2 into ethylene and alcohols has led to a vivid debate on the possible relation between their operando (sub-)surface oxidation state (i. e. fully reduced or partially oxidized) and this distinct reactivity. The high roughness of the Cu oxides used in previous studies on this matter adds complexity to this controversy and motivated us to prepare quasi-planar Cu2O thin films that displayed a CO2 reduction selectivity similar to that of oxide-derived copper catalysts reported in previous studies. Most importantly, when the post-mortem thin films were transferred for characterization in an air-free environment, X-ray photoelectron spectroscopy measurements confirmed their complete reduction in the course of the CO2 reduction reaction. Thus, our results indicate that the selectivity of the Cu oxides featured in previous studies stems from their enhanced roughness, highlighting the importance of controlled sample transfer upon post-mortem characterization with ex situ techniques. 相似文献
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56.
Yali Sun Ivan Sinev Anastasia Zalogina Eduard Ageev Hadi Shamkhi Filipp Komissarenko Ivan Morozov Sergey Lepeshov Valentin Milichko Sergey Makarov Ivan Mukhin Dmitry Zuev 《Laser u0026amp; Photonics Reviews》2019,13(2)
Tailoring of the near‐field properties of the nanostructures is a significant task for the control of radiation of nanoscale light sources as well as for sensing applications. Generally, this task is solved in plasmonic oligomers on the fabrication step by the choice of geometry or by controlling the excitation light during the experiments. Here, the pronounced modification of the near‐field pattern in hybrid gold‐silicon oligomers by femtosecond laser reshaping by visualizing it with aperture‐type near‐field optical microscope is demonstrated. This effect correlates with a moderate red‐shift of the broadband magnetic dipole resonance of the structure that occurs upon reshaping the gold component of the oligomers. The proposed all‐optical near‐field reconfiguration approach makes hybrid oligomers a promising platform for on‐demand engineering of local field enhancement in metadevices for data recording and sensing. 相似文献
57.
Shchelkanova Mariya S. Shekhtman Georgi Sh. Kalashnova Anastasia V. Reznitskikh Olga G. 《Journal of Solid State Electrochemistry》2018,22(9):2959-2964
Journal of Solid State Electrochemistry - Lithium ion conductivity of lithium hexaoxozirconate Li8ZrO6 doped by Mg2+, Sr2+, Nb5+, V5+, and Ce4+ cations was studied using impedance spectroscopy. The... 相似文献
58.
Anastasia V. Blake Haochuan Wei Courtney M. Donahue Kyounghoon Lee Jason M. Keith Scott R. Daly 《Journal of synchrotron radiation》2018,25(2):529-536
P K‐edge X‐ray absorption near‐edge structure (XANES) spectroscopy is a powerful method for analyzing the electronic structure of organic and inorganic phosphorus compounds. Like all XANES experiments, P K‐edge XANES requires well defined and readily accessible calibration standards for energy referencing so that spectra collected at different beamlines or under different conditions can be compared. This is especially true for ligand K‐edge X‐ray absorption spectroscopy, which has well established energy calibration standards for Cl (Cs2CuCl4) and S (Na2S2O3·5H2O), but not neighboring P. This paper presents a review of common P K‐edge XANES energy calibration standards and analysis of PPh4Br as a potential alternative. The P K‐edge XANES region of commercially available PPh4Br revealed a single, highly resolved pre‐edge feature with a maximum at 2146.96 eV. PPh4Br also showed no evidence of photodecomposition when repeatedly scanned over the course of several days. In contrast, we found that PPh3 rapidly decomposes under identical conditions. Density functional theory calculations performed on PPh3 and PPh4+ revealed large differences in the molecular orbital energies that were ascribed to differences in the phosphorus oxidation state (III versus V) and molecular charge (neutral versus +1). Time‐dependent density functional theory calculations corroborated the experimental data and allowed the spectral features to be assigned. The first pre‐edge feature in the P K‐edge XANES spectrum of PPh4Br was assigned to P 1s → P‐C π* transitions, whereas those at higher energy were P 1s → P‐C σ*. Overall, the analysis suggests that PPh4Br is an excellent alternative to other solid energy calibration standards commonly used in P K‐edge XANES experiments. 相似文献
59.
Ekaterina N. Voronina Anastasia A. Sycheva Dmitry V. Lopaev Tatyana V. Rakhimova Alexander T. Rakhimov Olga V. Proshina Dmitry G. Voloshin Sergey M. Zyryanov Alexey I. Zotovich Yuri A. Mankelevich 《Plasma Processes and Polymers》2020,17(2)
Organosilicate glass (OSG) nanoporous films with a low dielectric constant (low‐k) are used as interlayer‐dielectric insulators for advanced interconnects of ultra‐large‐scale integration devices. Plasma treatment of these materials can lead to their degradation resulting in increasing k‐value and reducing lifetime and reliability. However, for some OSG films, the densification of the uppermost surface layer and pore sealing was observed under ion irradiation. This paper presents the results of a combined experimental and modeling study of mechanisms of low‐k film densification by ion bombardment depending on the film‐pore size, ion type, and energy. The obtained results reveal that experimentally observed densification and pore sealing of uppermost layers of OSG films occur via collapse of near‐surface pores under the impact of energetic ions. 相似文献
60.
Anastasia Doikou Nikos Karaiskos 《Nuclear Physics B》2011,853(2):436-460
We study the classical generalized gln Landau-Lifshitz (L-L) model with special boundary conditions that preserve integrability. We explicitly derive the first non-trivial local integral of motion, which corresponds to the boundary Hamiltonian for the sl2 L-L model. Novel expressions of the modified Lax pairs associated to the integrals of motion are also extracted. The relevant equations of motion with the corresponding boundary conditions are determined. Dynamical integrable boundary conditions are also examined within this spirit. Then the generalized isotropic and anisotropic gln Landau-Lifshitz models are considered, and novel expressions of the boundary Hamiltonians and the relevant equations of motion and boundary conditions are derived. 相似文献