44 research outputs found

    Π­ΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½Π°Ρ модСль для исслСдования биологичСски Π΄Π΅Ρ‚Π΅Ρ€ΠΌΠΈΠ½ΠΈΡ€ΠΎΠ²Π°Π½Π½Ρ‹Ρ… взаимодСйствий Π² области ΠΊΠΎΠ½Ρ‚Π°ΠΊΡ‚Π° ΠΈΠΌΠΏΠ»Π°Π½Ρ‚Π°Ρ‚ - костная Ρ‚ΠΊΠ°Π½ΡŒ

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    Aim: a) to develop the method for surface modification of polytetrafluoroethylene (PTFE) by applying a nanostructured metallic or ceramic coating, b) to study the possibility of using this obtained structures with different coatings as an experimental model for analysis of the fine interactions in the contact implant-tissue zone. The study demonstrates that the surface modification of PTFE by magnetron sputtering of nano-Ti and Ti-Ca-P-C-O-N leads to increased integration potential of materials. Data obtained indicate that the designed constructions can be successfully used as an experimental model for studying the interactions of implant - tissue interface elements of periimplant area.Π’ Π·Π°Π΄Π°Ρ‡ΠΈ Ρ€Π°Π±ΠΎΡ‚Ρ‹ Π²Ρ…ΠΎΠ΄ΠΈΠ»ΠΎ: Π°) Ρ€Π°Π·Ρ€Π°Π±ΠΎΡ‚ΠΊΠ° ΠΌΠ΅Ρ‚ΠΎΠ΄Π° ΠΌΠΎΠ΄ΠΈΡ„ΠΈΠΊΠ°Ρ†ΠΈΠΈ повСрхности политСтрафторэтилСна (ПВЀЭ) ΠΏΡƒΡ‚Π΅ΠΌ нанСсСния наноструктурного мСталличСского ΠΈΠ»ΠΈ кСрамичСского покрытия; Π±) исслСдованиС возмоТности использования ΠΏΠΎΠ»ΡƒΡ‡Π΅Π½Π½ΠΎΠΉ Ρ‚Π°ΠΊΠΈΠΌ ΠΎΠ±Ρ€Π°Π·ΠΎΠΌ конструкции с Ρ€Π°Π·Π»ΠΈΡ‡Π½Ρ‹ΠΌΠΈ ΠΏΠΎ составу покрытиями Π² качСствС ΡΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½ΠΎΠΉ ΠΌΠΎΠ΄Π΅Π»ΠΈ для исслСдования Ρ‚ΠΎΠ½ΠΊΠΈΡ… взаимодСйствий Π² области ΠΊΠΎΠ½Ρ‚Π°ΠΊΡ‚Π° ΠΈΠΌΠΏΠ»Π°Π½Ρ‚Π°Ρ‚ - Ρ‚ΠΊΠ°Π½Π΅Π²Ρ‹Π΅ элСмСнты ΠΏΠ΅Ρ€ΠΈΠΈΠΌΠΏΠ»Π°Π½Ρ‚Π°Ρ†ΠΈΠΎΠ½Π½ΠΎΠΉ Π·ΠΎΠ½Ρ‹. ИсслСдованиС продСмонстрировало, Ρ‡Ρ‚ΠΎ модификация повСрхности ПВЀЭ ΠΏΡƒΡ‚Π΅ΠΌ ΠΌΠ°Π³Π½Π΅Ρ‚Ρ€ΠΎΠ½Π½ΠΎΠ³ΠΎ напылСния Π½Π°Π½ΠΎΠΏΠΎΠΊΡ€Ρ‹Ρ‚ΠΈΠΉ Ti ΠΈ Ti-Ca-P-C-O-N ΠΏΡ€ΠΈΠ²ΠΎΠ΄ΠΈΡ‚ ΠΊ ΠΏΠΎΠ²Ρ‹ΡˆΠ΅Π½ΠΈΡŽ ΠΈΠ½Ρ‚Π΅Π³Ρ€Π°Ρ†ΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ ΠΏΠΎΡ‚Π΅Π½Ρ†ΠΈΠ°Π»Π° ΠΌΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π»ΠΎΠ². ΠŸΠΎΠ»ΡƒΡ‡Π΅Π½Π½Ρ‹Π΅ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ ΡΠ²ΠΈΠ΄Π΅Ρ‚Π΅Π»ΡŒΡΡ‚Π²ΡƒΡŽΡ‚ ΠΎ Ρ‚ΠΎΠΌ, Ρ‡Ρ‚ΠΎ Ρ€Π°Π·Ρ€Π°Π±ΠΎΡ‚Π°Π½Π½Ρ‹Π΅ конструкции ΠΌΠΎΠ³ΡƒΡ‚ Π±Ρ‹Ρ‚ΡŒ с успСхом ΠΈΡΠΏΠΎΠ»ΡŒΠ·ΠΎΠ²Π°Π½Ρ‹ Π² качСствС ΡΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½ΠΎΠΉ ΠΌΠΎΠ΄Π΅Π»ΠΈ для изучСния взаимодСйствий Π² области интСрфСйса ΠΈΠΌΠΏΠ»Π°Π½Ρ‚Π°Ρ‚ - Ρ‚ΠΊΠ°Π½Π΅Π²Ρ‹Π΅ элСмСнты ΠΏΠ΅Ρ€ΠΈΠΈΠΌΠΏΠ»Π°Π½Ρ‚Π°Ρ†ΠΈΠΎΠ½Π½ΠΎΠΉ Π·ΠΎΠ½Ρ‹

    Layers of Cold Dipolar Molecules in the Harmonic Approximation

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    We consider the N-body problem in a layered geometry containing cold polar molecules with dipole moments that are polarized perpendicular to the layers. A harmonic approximation is used to simplify the hamiltonian and bound state properties of the two-body inter-layer dipolar potential are used to adjust this effective interaction. To model the intra-layer repulsion of the polar molecules, we introduce a repulsive inter-molecule potential that can be parametrically varied. Single chains containing one molecule in each layer, as well as multi-chain structures in many layers are discussed and their energies and radii determined. We extract the normal modes of the various systems as measures of their volatility and eventually of instability, and compare our findings to the excitations in crystals. We find modes that can be classified as either chains vibrating in phase or as layers vibrating against each other. The former correspond to acoustic and the latter to optical phonons. Instabilities can occur for large intra-layer repulsion and produce diverging amplitudes of molecules in the outer layers. Lastly, we consider experimentally relevant regimes to observe the structures.Comment: 17 pages, 20 figures, accepted versio

    Activity of Russian Space Agency in the field of electric propulsion

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