Publications on the project |
077 Investigation of vibration anharmonicity in the crystal lattice of the mixed composition apatites |
Authors: | V.L. Karbivskyy, A.P. Shpak, N.A. Kurgan, V.V.Vishnjak, O.P. Dimitriev, V.H.Kasiyanenko
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Summary: | The study results of the influence of lattice crystal field on the structure of the IR vibrational bands in the tetrahedral sublattice of the crystal (РО4)3- with the isomorphous anionic substitution of compounds Ca10(PO4)6 x(VO4)x(М)2, where М= OH , F , Cl , x = 0, 1, 3, 5, 6 were considered. It was established that the decrease in the interaction between the tetrahedra of same type, and as a consequence, the suppression of vibration anharmonicity in quasi-free tetrahedra. High sensitivity of chlorapatites matrix to changes of vibrations in tetrahedral sublattice by doping affects the thermal stability of compound. | |
Keywords: | apatite, tetrahedral sublattice, the isomorphous substitution, anharmonicity | |
Edition: | Functional materials | | | 2011,
195-199,English |
077 Morphology and spectral behavior of gas detonation deposited hydroxyapatite nanocrystalline coatings |
Authors: | V. L. Karbovskiy, N. A. Kurgan, V. A. Dubok*, N. I. Klyuy**, V. Kh. Kasiyanenko, V. V. Stonis, N. V. Rozhkov | |
Summary: | Electronic and crystalline structure of hydroxyapatite (HAP), deposited on the titanium substrate by gas detonation deposition (GDD), was investigated by scanning probe microscopy and spectroscopic methods. Nanoscale structure formation of coatings in the form of nano-dispersed ceramics was determined. Size effects in the transition of HAP from the crystalline (powder) to nanodispersed (coating) state was studied. It is revealed that the elemental composition of GDD cover surface and subsurface layers remains stable up to the depth of 50 nm. The change of elemental composition of GDD cover subsurface layers in the direction of increasing the calcium and phosphorus content was observed in the range 50 - 150 nm. | |
Keywords: | Electronic and crystalline structure, hydroxyapatite, gas detonation deposition method, nanodispersed coating | |
Edition: | Functional materials | | | 2012,
297-303,English |
077 Apatite and apatite-like compounds. Electronic structure and properties |
Authors: | V.L. Karbivskyy, A.P. Shpak | |
Summary: | The monograph is devoted to electronic structure, synthesis, properties and application of apatite and apatite-like compounds. Contains extensive material on the study of atomic and electronic structure of specific systems. The current understanding of the structure of crystalline and disordered apatite-like structures, as well as the physico-chemical, biomedical, environmental and the technological aspects of the application were considered. Special attention is given to theoretical and applied research in the field of functional apatite-like nanomaterials.The features of the electronic structure of natural apatite were described. For specialists in the field of physics and chemistry of apatite engage in study, development and application of new materials, as well as teachers, postgraduates and students the relevant specialties. | |
Keywords: | apatite, apatite-like nanomaterials, electronic structure, physico-chemical properties, synthesis | |
Edition: | Kiyv, Naukova Dumka | | | 2010,
1-483,Russian |
077 Synthesis, structure and properties of nanoscale apatite-like systems |
Authors: | N.A. Kurgan | |
Summary: | In the report was examined the important questions of synthesis methods improving, of structure and properties basic patterns establishment of apatyte-like nanoscale systems. It is presented the results of electronic and atomic structure investigations of nanodispersed calcium apatite. The correlations between characteristics of electronic structure, atomic structure and properties of nanodispersed calcium apatite was established. It was investigated its sorption properties and identified possible areas of its use as matrices for radioactive waste disposal. The new ad-vanced methods of calcium apatite based coatings preparation for medical needs was developed. | |
Keywords: | nanodispersed calcium apatite, sol-gel method, biomaterials, atomic structure, sorption, bioactive nanocomposites | |
Edition: | Visnik NAN of Ukraine | | | 2012,
53-57,Ukrainian |
077 Electronic structure and morphology of nanoscale calcium hydroxyapatite powders |
Authors: | N.A.Kurgan | |
Summary: | In this work the morphological and physicochemical properties of calcium hydroxyapatite powders obtained by varying the temperature of synthesis parameters were investigated using atomic force microscopy, IR spectroscopy and NMR methods. The features of the morphology of calcium hydroxyapatite nanoparticles formation by varying the annealing temperature in the range 200-1000 °C was determined. It is shown that the particle size of the apatite obtained by annealing at 700 ° C is 40 nm and corresponds to the particle size of the native bone apatite. It was established the influence of the size effect on the structural parameters of calcium hydroxyapatite, which appears in a higher local symmetry of PO43- tetrahedra for nanodispersed calcium hydroxyapatite. | |
Keywords: | atomic force microscopy, nano-dispersed calcium hydroxyapatite, morphology, electronic structure | |
Edition: | Nanosystems, nanomaterials and nanotechnologies | | | 2014,
105-112,Russian |
077 Preparation of the functional bionanomaterials based on the calcium apatite using biogenic source of calcium |
Authors: | V. L. Karbivskyy, A.P. Shpak, N.A. Kurgan | |
Summary: | The technology of producing nanocrystalline hydroxyapatite used biogenic sources of calcium is proposed. It allows to obtain the materials based on apatite for cheapening scheme and facilitates solving problem waste food and poultry. The technology is based on obtaining a nanodispersed apatite-based materials use of the biogenic materials such as egg shells of birds (quail, chicken, ostrich, etc.) in the form of powder with a monomodal particle size distribution of about 40 nm. Specific surface area in the nanoapatite obtained by the developed method in ~ 1.3 times greater than powders produced by standard techniques. | |
Keywords: | nanocrystalline hydroxyapatite, biogenic synthesis, atomic force microscopy | |
Edition: | Nanoscale systems and nanomaterials: research in Ukraine | | | 2014,
605-609,Russian |
The events in the framework of the project |
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077 5. Nanobiotechnology Purpose: Expected results:Release of new product: technology Stage 1: Stage 2: Stage 3: Stage 4: Stage 5:
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