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1.
V. I. Verkhoturov O. S. Grafodatskii V. I. Simanchuk A. V. Kargapol'tsev 《Russian Physics Journal》1993,36(9):865-869
Experimental results are presented on acoustic probing of electric fields in solid insulators. An experimental apparatus and methods are described for acoustic measurements of the bulk space charge density and electric field strength in solid insulators. The sensitivity and spatial resolution of the acoustic probe technique are determined.Institute of Introscopy Research, Polytechnical University, Tomsk. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 9, pp. 62–67, September, 1993. 相似文献
2.
We present the first experimental data on the simultaneous ejection of two molecular ions from the impact of Au(+)(n) (1< or =n< or =4) with energies ranging between 17 and 56 keV. The yields from single phenylalanine (Ph) emission, coemission of two Ph ions, and emission of the Ph dimer were measured. Large increases (1 to 2 orders of magnitude) in coemitted ion yields were observed with increasing projectile energy and complexity. Correlation coefficients were calculated for the coemission of two Ph ions; their behavior suggests differences in emission pathways for bombardment by atomic and polyatomic projectiles. 相似文献
3.
V. G. Bagrov V. I. Verkhoturov O. S. Grafodatskii B. F. Samsonov V. I. Simanchuk 《Russian Physics Journal》1991,34(8):731-734
Electromagnetic wave scattering on a dielectric multilayer cylinder is studied. It is shown that the asymptotic behavior of the field in the inner layer of the cylinder is a superposition of two flat waves running towards each other. A simple way is found of computing the coefficients of this superposition.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 8, pp. 100–103, August, 1991. 相似文献
4.
S Shah S Lee JY Verkhoturov S Tuleuova N Schweikert EA Ramanculov E Revzin A 《Langmuir : the ACS journal of surfaces and colloids》2008,24(13):6837-6844
This paper describes a novel approach of controlling cell-surface interactions through an electrochemical "switching" of biointerfacial properties of optically transparent microelectrodes. The indium tin oxide (ITO) microelectrodes, fabricated on glass substrates, were modified with poly(ethylene glycol) (PEG) silane to make glass and ITO regions resistant to protein and cell adhesion. Cyclic voltammetry, with potassium ferricyanide serving as a redox reporter molecule, was used to monitor electron transfer across the electrolyte-ITO interface. PEG silane modification of ITO correlated with diminished electron transfer, judged by the disappearance of ferricyanide redox activity. Importantly, application of reductive potential (-1.4 V vs Ag/AgCl reference) corresponded with reappearance of typical ferricyanide redox peaks, thus pointing to desorption of an insulating PEG silane layer. Time-of-flight secondary ion mass spectrometry (ToF-SIMS) characterization of the silanized ITO surfaces after electrical stimulation indicated complete removal of the silane layer. Significantly, electrical stimulation allowed to "switch" chosen electrodes from nonfouling to protein-adhesive while leaving other ITO and glass regions protected by a nonfouling PEG silane layer. The spatial and temporal control of biointerfacial properties afforded by our approach was utilized to micropattern proteins and cells and to construct micropatterned co-cultures. In the future, control of the biointerfacial properties afforded by this novel approach may allow the organization of multiple cell types into precise geometric configurations in order to create better in vitro mimics of cellular complexity of the native tissues. 相似文献
5.
Advanced photoresist technologies by intricate molecular brush architectures: Diblock brush terpolymer-based positive-tone photoresist materials
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6.
S. E. Maksimov S. V. Verkhoturov V. V. Solomko N. Kh. Dzhemilev 《Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques》2013,7(5):996-1000
The results of studying the emission and fragmentation of niobium-carbon clusters Nb m C n + synthesized upon sputtering a niobium carbide surface with Xe+ ions are presented. The fragmentation channels of Nb m C n + clusters are studied. We present the values of the dissociation energy of some Nb m C n + clusters (m = 1–7, n = 2–8) calculated within the context of the “evaporation ensemble” model and theory of unimolecular reactions based on performed measurements of the kinetic-energy spectra of fragment ions. The obtained results are compared with published data. 相似文献
7.
8.
JD Debord S Della-Negra FA Fernandez-Lima SV Verkhoturov EA Schweikert 《The journal of physical chemistry. C, Nanomaterials and interfaces》2012,116(14):8138-8144
Carbon cluster emission from thin carbon foils (5-40 nm) impacted by individual Au(n) (+q) cluster projectiles (95-125 qkeV, n/q = 3-200) reveals features regarding the energy deposition, projectile range, and projectile fate in matter as a function of the projectile characteristics. For the first time, the secondary ion emission from thin foils has been monitored simultaneously in both forward and backward emission directions. The projectile range and depth of emission were examined as a function of projectile size, energy, and target thickness. A key finding is that the massive cluster impact develops very differently from that of a small polyatomic projectile. The range of the 125 qkeV Au(100q) (+q) (q ≈ 4) projectile is estimated to be 20 nm (well beyond the range of an equal velocity Au(+)) and projectile disintegration occurs at the exit of even a 5 nm thick foil. 相似文献
9.
Andreev E. N. Arslanova D. N. Akhmetzyanova E. V. Bazarov A. M. Vasil’ev V. N. Vasil’eva O. S. Verkhoturov M. S. Gapionok E. I. Demina A. A. Zavadskii S. V. Zenkevich M. Yu. Kaparkova M. V. Kuz’menkov V. D. Labusov A. N. Larionov M. S. Manzuk M. V. Mizintsev A. V. Nezhentsev A. N. Ovsyannikov D. A. Ovsyannikov A. D. Khokhlov M. V. 《Technical Physics》2019,64(7):1060-1065
Technical Physics - At present, the development of magnetic levitation transportation is conducted based on electromagnetic and electrodynamic suspensions the technical and commercial... 相似文献
10.
G Fuchs K-H Müller J Freudenberger K Nenkov S-L Drechsler SV Shulga D Lipp A Gladun T Cichorek P Gegenwart 《Pramana》2002,58(5-6):791-797
The effect of substitutional disorder on the superconducting properties of YNi2B2C was studied by partially replacing yttrium and nickel by Lu and Pt, respectively. For the two series of (Y, Lu)Ni2B2C and Y(Ni, Pt)2B2C compounds, the upper critical field H
c2(T) and the specific heat c
p(T, H) in the superconducting mixed state have been investigated. Disorder is found to reduce several relevant quantities such
as T
c, the upper critical field H
c2(0) at T=0 and a characteristic positive curvature of H
c2(T) observed for these compounds near T
c. The H
c2(T) data point to the clean limit for (Y, Lu) substitutions and to a transition to the quasi-dirty limit for (Ni, Pt) substitutions.
The electronic specific heat contribution γ(H) exhibits significant deviations from the usual linear γ(H) law. These deviations reduce with growing substitutional disorder but remain even in the quasidirty limit which is reached
in the Y(Ni1−x
, Pt
x
)2B2C samples for x=0.1. 相似文献