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Films of nonuniform Cu100−xCox alloys with x = 6, 11, 20, and 35 at. %, obtained by electrolytic deposition, are investigated using quantum magnetometry
in fields of up to 5.5 T and temperatures of 2–300 K. In all the compositions a characteristic feature is the deviation from
pure superparamagnetic behavior, which increases as the annealing of the films and their cobalt content increase.
Institute of Solid State and Semiconductor Physics. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 3,
pp. 60–62, March, 1998. 相似文献
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Gosteva Alevtina N. Plyusnin Pavel E. Semushina Yulya P. Pechenyuk Sofiya I. Filatov Evgeny Yu. Kyrtova Olga Yu. 《Journal of Thermal Analysis and Calorimetry》2018,134(1):253-260
Journal of Thermal Analysis and Calorimetry - The thermal behavior of double complex compounds (DCC) [Cr(ur)6][Co(CN)6]·4H2O (I), [Cr(ur)6][Co(C2O4)3]·3.5H2O (II),... 相似文献
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Volinsky R Kolusheva S Berman A Jelinek R 《Langmuir : the ACS journal of surfaces and colloids》2004,20(25):11084-11091
Lipid interactions and cooperative assembly properties are fundamental determinants for the action of antimicrobial membrane-active peptides. Here we analyze the interactions and aggregation properties of alamethicin, an antimicrobial pore-forming peptide, with films formed at the air/water interface. Surface-area/pressure isotherms, Brewster angle microscopy, and fluorescence-confocal microscopy provided detailed information on the morphologies and structural properties of the peptide and its effect on the film components. The pressure-area analysis and microscopy experiments facilitated unprecedented visualization of the structural consequences of alamethicin association at the air/water interface, with pure phospholipid films, and within mixed phospholipid/polydiacetylene (PDA) films. The analysis exposed the kinetic features and the interplay between the peptide aggregates and film constituents. In particular, the results demonstrate the use of phospholipid/PDA film assemblies for studying membrane-peptide association and interactions within two-dimensional films. 相似文献
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Demikhovsky Y Kolusheva S Geyzer M Jelinek R 《Journal of colloid and interface science》2011,364(2):428-434
Mesostructured silica films have attracted interest as potential platforms for sensing, molecular sieving, catalysis, and others. The fabrication of free-standing silica films on water, however, is challenging due to the need for scaffolding agents that would constitute effective templates. We describe the assembly of thin film at the air/water interface comprising quaternary silicates and polydiacetylene (PDA), a unique chromatic polymer forming two-dimensional conjugated networks, and the use of these films for biological sensing. PDA exhibits a dual role in the system-both as the amphiphilic matrix facilitating immobilization of the silicate colloidal units at the air/water interface and additionally a chromatic reporter that undergoes visible blue-red transitions, accompanied by fluorescence transformations, in the presence of analytes. We demonstrate the application of the silicate/PDA thin films for the detection of bacterial proliferation. 相似文献
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It has been experimentally shown for the first time that below Tc RbD3 (SeO3)2 possesses spontaneous polarization of the order of 10?4 μC cm?2. 相似文献
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Sofiya Ostrovska 《Archiv der Mathematik》2006,86(3):282-288
Let Bn (f, q; x), n=1, 2, ... , 0 < q < ∞, be the q-Bernstein polynomials of a function f, Bn (f, 1; x) being the classical Bernstein polynomials. It is proved that, in general, {Bn (f, qn; x)} with qn ↓ 1 is not an approximating sequence for f ∈C[0, 1], in contrast to the standard case qn ↓ 1. At the same time, there exists a sequence 0 < δn ↓ 0 such that the condition
implies the approximation of f by {Bn (f, qn; x)} for all f ∈C[0, 1].
Received: 15 March 2005 相似文献
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