44 research outputs found
ΠΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½Π°Ρ ΠΌΠΎΠ΄Π΅Π»Ρ Π΄Π»Ρ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ Π±ΠΈΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈ Π΄Π΅ΡΠ΅ΡΠΌΠΈΠ½ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ Π²Π·Π°ΠΈΠΌΠΎΠ΄Π΅ΠΉΡΡΠ²ΠΈΠΉ Π² ΠΎΠ±Π»Π°ΡΡΠΈ ΠΊΠΎΠ½ΡΠ°ΠΊΡΠ° ΠΈΠΌΠΏΠ»Π°Π½ΡΠ°Ρ - ΠΊΠΎΡΡΠ½Π°Ρ ΡΠΊΠ°Π½Ρ
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°ΡΠΈ ΡΠ°Π±ΠΎΡΡ Π²Ρ
ΠΎΠ΄ΠΈΠ»ΠΎ: Π°) ΡΠ°Π·ΡΠ°Π±ΠΎΡΠΊΠ° ΠΌΠ΅ΡΠΎΠ΄Π° ΠΌΠΎΠ΄ΠΈΡΠΈΠΊΠ°ΡΠΈΠΈ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ ΠΏΠΎΠ»ΠΈΡΠ΅ΡΡΠ°ΡΡΠΎΡΡΡΠΈΠ»Π΅Π½Π° (ΠΠ’Π€Π) ΠΏΡΡΠ΅ΠΌ Π½Π°Π½Π΅ΡΠ΅Π½ΠΈΡ Π½Π°Π½ΠΎΡΡΡΡΠΊΡΡΡΠ½ΠΎΠ³ΠΎ ΠΌΠ΅ΡΠ°Π»Π»ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΈΠ»ΠΈ ΠΊΠ΅ΡΠ°ΠΌΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΏΠΎΠΊΡΡΡΠΈΡ; Π±) ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΠΈ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΠΎΠΉ ΡΠ°ΠΊΠΈΠΌ ΠΎΠ±ΡΠ°Π·ΠΎΠΌ ΠΊΠΎΠ½ΡΡΡΡΠΊΡΠΈΠΈ Ρ ΡΠ°Π·Π»ΠΈΡΠ½ΡΠΌΠΈ ΠΏΠΎ ΡΠΎΡΡΠ°Π²Ρ ΠΏΠΎΠΊΡΡΡΠΈΡΠΌΠΈ Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΠΎΠΉ ΠΌΠΎΠ΄Π΅Π»ΠΈ Π΄Π»Ρ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΡΠΎΠ½ΠΊΠΈΡ
Π²Π·Π°ΠΈΠΌΠΎΠ΄Π΅ΠΉΡΡΠ²ΠΈΠΉ Π² ΠΎΠ±Π»Π°ΡΡΠΈ ΠΊΠΎΠ½ΡΠ°ΠΊΡΠ° ΠΈΠΌΠΏΠ»Π°Π½ΡΠ°Ρ - ΡΠΊΠ°Π½Π΅Π²ΡΠ΅ ΡΠ»Π΅ΠΌΠ΅Π½ΡΡ ΠΏΠ΅ΡΠΈΠΈΠΌΠΏΠ»Π°Π½ΡΠ°ΡΠΈΠΎΠ½Π½ΠΎΠΉ Π·ΠΎΠ½Ρ. ΠΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΏΡΠΎΠ΄Π΅ΠΌΠΎΠ½ΡΡΡΠΈΡΠΎΠ²Π°Π»ΠΎ, ΡΡΠΎ ΠΌΠΎΠ΄ΠΈΡΠΈΠΊΠ°ΡΠΈΡ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ ΠΠ’Π€Π ΠΏΡΡΠ΅ΠΌ ΠΌΠ°Π³Π½Π΅ΡΡΠΎΠ½Π½ΠΎΠ³ΠΎ Π½Π°ΠΏΡΠ»Π΅Π½ΠΈΡ Π½Π°Π½ΠΎΠΏΠΎΠΊΡΡΡΠΈΠΉ Ti ΠΈ Ti-Ca-P-C-O-N ΠΏΡΠΈΠ²ΠΎΠ΄ΠΈΡ ΠΊ ΠΏΠΎΠ²ΡΡΠ΅Π½ΠΈΡ ΠΈΠ½ΡΠ΅Π³ΡΠ°ΡΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ ΠΏΠΎΡΠ΅Π½ΡΠΈΠ°Π»Π° ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ². ΠΠΎΠ»ΡΡΠ΅Π½Π½ΡΠ΅ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΡΠ²ΠΈΠ΄Π΅ΡΠ΅Π»ΡΡΡΠ²ΡΡΡ ΠΎ ΡΠΎΠΌ, ΡΡΠΎ ΡΠ°Π·ΡΠ°Π±ΠΎΡΠ°Π½Π½ΡΠ΅ ΠΊΠΎΠ½ΡΡΡΡΠΊΡΠΈΠΈ ΠΌΠΎΠ³ΡΡ Π±ΡΡΡ Ρ ΡΡΠΏΠ΅Ρ
ΠΎΠΌ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½Ρ Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΠΎΠΉ ΠΌΠΎΠ΄Π΅Π»ΠΈ Π΄Π»Ρ ΠΈΠ·ΡΡΠ΅Π½ΠΈΡ Π²Π·Π°ΠΈΠΌΠΎΠ΄Π΅ΠΉΡΡΠ²ΠΈΠΉ Π² ΠΎΠ±Π»Π°ΡΡΠΈ ΠΈΠ½ΡΠ΅ΡΡΠ΅ΠΉΡΠ° ΠΈΠΌΠΏΠ»Π°Π½ΡΠ°Ρ - ΡΠΊΠ°Π½Π΅Π²ΡΠ΅ ΡΠ»Π΅ΠΌΠ΅Π½ΡΡ ΠΏΠ΅ΡΠΈΠΈΠΌΠΏΠ»Π°Π½ΡΠ°ΡΠΈΠΎΠ½Π½ΠΎΠΉ Π·ΠΎΠ½Ρ
Layers of Cold Dipolar Molecules in the Harmonic Approximation
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