ЭЛЕКТРООСАЖДЕНИЕ МЕДНЫХ ПЛЕНОК ВО ВНЕШНЕМ ПОСТОЯННОМ МАГНИТНОМ ПОЛЕ

В.А. Заблудовский, Д.И. Борощук

Днепропетровский национальный университет железнодорожного транспорта имени ак. В. Лазаряна

Из-за большого интереса к тонким металлическим покрытиям, которые обладают повышенными прочностными, коррозионными, защитно-декоративными свойствами, необходимо внедрение новых методов их получения и контроля. Одним из таких методов получения тонких металлических пленок с определенной структурой, а следовательно, и свойствами, является наложение внешнего постоянного магнитного поля в процессе электроосаждения. Целью данной работы является исследование влияния постоянного внешнего магнитного поля на процесс электроосаждения, структуру и некоторые физические свойства медных пленок.

ОЦЕНКА РАСТВОРИМОСТИ БИНАРНЫХ ФТОРИДОВ BaF2, MgF2 И ОБРАЗОВАНИЕ НАНОСТРУКТУР BaMgF4 В СОЛЕВОМ РАСПЛАВЕ

С.А. Тарасенко, Е.В. Тимухин, В.Ф. Зинченко

Физико-химический институт им. А.В. Богатского НАН Украины, Одесса, Украина

ASSESSMENT OF SOLUBILITY OF BINARY FLUORIDE BaF2, MgF2 AND FORMATION OF BaMgF4 NANOSTRUCTURE IN SALINE MELT

S. A. Tarasenko, Ie. V. Timukhin, V.F. Zinchenko

A. V. Bogatsky Physico-Chemical Institute of NAS of Ukraine

In this paper we examine the effect of interaction between barium fluoride and magnesium fluoride with the formation of BaMgF4 on solubility of the components and complex fluoride in saline melt NaCl-KCl. Evaluation of the solubility is carried out on the basis of basicity-acidity concept, and presumption of exchange reactions between fluorides and saline melt as a necessary condition for the dissolution process. It is shown that the substitution of alkaline earth metal in fluoride for a heavier analog results in an increase of solubility. Formation of complex fluoride leads to regular decrease in solubility of the components in water and saline melt, which promotes an increase of the resistance of material on its base to the environment. In addition, it opens the way to the synthesis of BaMgF4 in saline melt including nano-dispersed state.

MODELING OF TEXTURE DEVELOPMENT AND GRAIN MISORIENTATION DISTRIBUTION IN MAGNESIUM DURING EQUAL-CHANNEL ANGULAR PRESSING

A.A. Ostapovets, P. Šedá, A. Jäger , P. Lejček

Institute of Physics of Academy of Sciences of Czech Republic, Czech Republic

New misorientation scheme is applied together with visco-plastic self-consistent model for modeling of texture and grain misorientation development. The proposed misorientation scheme is based on possible interaction of dislocations belonging to different slip systems. It produces specific grain misorientations depending on relative activity of the slip systems. Predictions of the model are compared with experimental data measured with electron backscatter diffraction technique on magnesium single crystal processed by equal-channel angular pressing. It is shown that proposed approach reproduce texture, and grain misorientation distributions qualitavely well.

СТРУКТУРНЫЕ ПРЕВРАЩЕНИЯ В ПЛЕНКАХ Mo, ВЫРАЩЕННЫХ МЕТОДОМ МАГНЕТРОННОГО РАСПЫЛЕНИИ НА a-Si

В.А. Севрюкова, Е.Н. Зубарев, В.В. Кондратенко, Ю.П. Першин, В.О. Цебенко

Национальный технический университет «Харьковский политехнический институт» , Харьков, Украина

The structure of Mo-layer deposited onto an amorphous silicon layer as a function of Mo-thickness was studied by methods of transmission electron microscopy and X-ray diffractometry. When nominal thickness of molybdenum layers is within the range of 1.5-1.9 nm the Mo-layers consist of clusters with characteristic dimension of 1-2 nm. The transition from cluster to crystallite state is observed within the interval of 1.9-2.5 nm of growing Mo-layer. Nucleated Mo crystallites have highly inequiaxial form with dimensions of (3-4)(15-30) nm in the film plane. As the Mo-layer thickness further increases, Mo-crystallites gradually became equiaxial at the expense of a recrystallization.

СТРУКТУРНЫЕ ОСОБЕННОСТИ ОКСИДНОГО СЛОЯ, ПОЛУЧЕННОГО В УСЛОВИЯХ ЭЛЕКТРОЛИТНОЙ ПЛАЗМЫ

Л. И. Федоренкова

Днепропетровский национальный университет им. Олеся Гончара, Днепропетровск, Украина

Structural specifics of the oxide layer made in electrolytic plasma conditions

L. Fedorenkova

In this work the oxide layer with structural specifics made for characteristic diffusion process in the zone around cathode under the electric discharge in aqueous solution of electrolyte was investigated. The electrolytic plasma action promotes the oxide layer formation with heterogeneous structure typical for process with high local cooling and heating rates.

РОЛЬ УФ-ИЗЛУЧЕНИЯ ПРИ ФОРМИРОВАНИИ НАНОСТРУКТУРНОГО НИТРИДА УГЛЕРОДА

Р.В.Шалаев, А.М.Прудников, А.Н.Ульянов, А.И.Линник, В.Н.Варюхин

Донецкий физико-технический Институт НАНУ, Донецк, Украина

ROLE OF UV-RADIATION AT FORMATION OF NANOSTRUCTURED CARBON NITRIDE

R.V.Shalaev, A.M.Prudnikov, A.N.Ulyanov, A.I.Linnik, V.N.Varyukhin

Dоnetsk Institute for Physics and Engineering of Ukrainian Academy of Sciences, Donetsk, Ukraine

During the last decade, the processing of carbon nanotubes/nanofibers was intensively developed because of both, fundamental scientific interest and prospective technological applications of such systems. In our laboratory, the technology of carbon-nitride (CNx) nanocolumns synthesis by dc magnetron sputtering of graphite target under intensive etching processes (both gas-phase etching and UV-irradiation photo-etching processes) was developed. It was demonstrated that the nanocolumns can be grown without any metallic catalyst. Optimal parameters for such nanostructure synthesis (etchant concentration and radiation power density) were experimentally determined.

ФОТОХИМИЧЕСКОЕ ОСАЖДЕНИЕ ЧАСТИЦ МЕДИ, СЕРЕБРА И ЗОЛОТА НА МОДИФИЦИРОВАННУЮ БУТОКСИДОМ ТИТАНА(IV) ПОВЕРХНОСТЬ КВАРЦА

Т.Б. Бойцова, И.И. Рослов, В.В. Горбунова, Е.И. Исаева

Российский государственный педагогический университет им. А. И. Герцена, Санкт-Петербург, Россия

PHOTOCHEMICAL DEPOSITION OF COPPER, SILVER AND GOLD PARTICLES ONTO QUARTZ MODIFIED BY TITANIUM(IV) BUTOXIDE FILMS

T.B.Boitsova, I.I. Roslov, V.V. Gorbunova, E.I. Issaeva

Herzen State Pedagogical University of Russia

Results of photochemical deposition of copper, silver and gold nanoparticles onto the surface of titanium(IV) butoxide films applied to the surface of quartz slide and modified by the UV irradiation with the excitation wavelength 254 nm are presented. The formation of the particles occurs in a near-surface layer with a direct involvement of the coating that gains an anatase structure under the action of UV light. Titanium(IV) butoxide films and titanium (IV) butoxide/metal nanocomposite films were analyzed by UV/Vis spectroscopy, IR spectroscopy, SEM, and AFM.

ФИЗИКО-ХИМИЧЕСКИЕ ОСНОВЫ ОБРАЗОВАНИЯ НАНОРАЗМЕРНЫХ ПОКРЫТИЙ И СЛОЕВ НИТРИДА АЛЮМИНИЯ НА ПОДЛОЖКАХ КРЕМНИЯ

Ю.В. Казаков

Московский институт электронной техники, Москва, Зеленоград, Россия

Energy problems of AlN epitaxy on silicon substrate with protective layer was considered. The epitaxy simulation was carried out with a glance of substrate defects, continuous or noncontinuous protective layer. Influence of protective layer character on specific surface energy of Nitride islands was showed.

ВЛИЯНИЕ ОБЛУЧЕНИЯ НА ПАРАМЕТРЫ НО И НЗ ПТБШ НА GAAS

А.П.Бибилашвили1, З.В.Джибути1,2, Н.Д.Долидзе1,2

1 Тбилисский Государственный Университет имени Ив. Джавахишвили, Тбилисси, Грузия
2 Грузинский Технический Университет, Тбилисси, Грузия

INFLUENCE OF AN IRRADIATION ON PARAMETERS OF THE NO AND NC MESFET ON GAAS

A.B.Bibilashvili1, Z.V.Jibuti1,2, N.D.Dolidze1,2

1 I.Javakhishvili Tbilisi state university,
2 Georgian technical university

In this paper a low-temperature technique of production of the normal open (NO) and normal closed (NC) field-effect transistors with Shottky barrier (MESFET) on GaAs has been developed. Transistors were fabricated in a single technological cycle, on the same substrate, and W-Pt alloy was used for the gates formation. Pulse-photon treatment was carried out for the channels conductivity control. Results of study of electron radiation effect on the parameters of NO and NC field-effect transistors are given. It has been shown that NO field-effect transistors are more sensitive to the action of radiation than NC ones. The possible reasons of the mentioned effects are given.

ПРОЦЕССЫ КОНТАКТНОГО ВЗАИМОДЕЙСТВИЯ В КОМПОЗИЦИОННЫХ МАТЕРИАЛАХ С МИКРОКРИСТАЛЛИЧЕСКИМ НАПОЛНИТЕЛЕМ

Е.В.Суховая, В.А.Сыроватко, Ю.В.Сыроватко

Днепропетровский национальный университет имени Олеся Гончара, Днепропетровск, Украина

In this paper the contact interaction processes occurring at the interfaces between the crys-tal or microcrystal filler and the iron-based binder during composites infiltration have been investigated. The structural and phase composition of zones appearing at the composites interfaces has been determined. The decrease in dissolution-and-diffusion interface width has been found while microcrystal W–C eutectic alloy is used as a filler. This characteris-tics also decreases with increase in cooling rate of microcrystal filler which has been ex-plained within the quantum-mechanic model framework. Additionally, the interface width decreases when Fe–C–B–P eutectic binder is alloyed with Mo.

FORMATION OF MULTICOMPARTMENT PARTICLES AND CAPSULES WITH POLYELECTROLYTE SHELL FORMED OF POLYPEPTIDES AND ENZYME-CATALYZED DISASSEMBLY OF THESE PARTICLES

I.V. Marchenko1,2, A.M. Yashchenok3,4, T.N. Borodina1, T.V. Bukreeva1,2, A.G. Skirtach4, G.S. Plotnikov5

1 Institute of Crystallography, Russian Academy of Sciences,
2 National Research Centre "Kurchatov Institute",
3 Saratov State University,
4 Max-Planck Institute of Colloids and Interfaces,
5 Moscow State University

Polyelectrolyte microcapsules are formed by stepwise adsorption of oppositely charged polyelectrolytes onto the surface of colloidal particles (cores) with following decomposition of the cores. Capsules can be used as microcontainers, microreactors and probes. Multicompartment capsules are promising objects for simultaneous delivery of several compounds and as intracellular sensors.
Multicompartment microparticles were assembled by layer-by-layer method. The polyelectrolyte shell was deposited onto surface of larger and smaller silica particles including both synthetic and biodegradable polyelectrolytes. Poly(L-arginine) as a polication, Poly(L-aspartic acid) and Poly(glutamic) acid as polyanions were used for construction of degradable part inside polyelectrolyte shell. The outer layers of larger and smaller particles had an opposite charge, so smaller silica particles were terminated to the surface of the bigger ones due to electrostatic interaction of their outer layers. It was shown that outer microparticles can be detached from the inner ones by enzyme degradation of polypeptide part of the shell. Such mechanism of detaching can be realized inside cells, where polypeptide shell can be destroyed by enzymes containing in the cell.
For investigation of enzyme degradation of biodegradable polyelectrolyte shell capsules consisting of polypeptides were formed. It was shown that integrity of capsules shell depends on number of polyelectrolyte layers and enzyme concentration.

ГЕТЕРОФАЗНОЕ ВЗАИМОДЕЙСТВИЕ КАРБИДОВ И ОКСИКАРБИДОВ ТИТАНА С ГАЗООБРАЗНЫМ МОНООКСИДОМ КРЕМНИЯ

Е. И. Истомина, П. В. Истомин, А. В. Надуткин

Институт химии Коми научного центра Уральского отделения РАН, Россия, г. Сыктывкар

HETEROGENEOUS INTERACTION BETWEEN TITANIUM CARBIDES OR OXYCARBIDES AND GASEOUS SILICON MONOXIDE

E. I. Istonina, P. V. Istomin, A. V. Nadutkin

Institute of Chemistry of Komi Scientific Centre of the Ural Division of the Russian Academy of Sciences, Russian Federation, Syktyvkar

In this paper we study high temperature silicidation of titanium carbides and oxycarbides with different stoichiometry by gaseous SiO at 1350 °C under vacuum condition. The reaction mixture of SiO2 + Si was used to generate SiO. It was found that Ti3SiC2, Ti5Si3 and TiSi2 are products of interaction. The solid products composition is strongly depended on carbide stoichiometry. When carbon content is close to stoichiometric carbide, the Ti3SiC2 is primary product followed by Ti5Si3 and TiSi2 as a result of further silicidation. The phase of Ti5Si3 is a single product forming during silicidation of titanium carbides with low carbon content.

ОСОБЕННОСТИ ФОРМИРОВАНИЯ И МОДИФИКАЦИИ НАНОСТРУКТУРИРОВАННЫХ ЧАСТИЦ КАРБОНАТА КАЛЬЦИЯ ДЛЯ СОЗДАНИЯ ФОТОЭЛЕКТРИЧЕСКИХ ЭЛЕМЕНТОВ И СИСТЕМ ДОСТАВКИ ЛЕКАРСТВ

Д. Б. Трушина, Э. В. Штыкова, Т. В. Букреева

Институт кристаллографии имени А.В. Шубникова РАН, Москва, Россия

FEATURES OF FORMATION AND MODIFICATION OF NANOSTRUCTURED CALCIUM CARBONATE PARTICLES FOR THE CREATION OF PHOTOVOLTAIC ELEMENTS AND DRUG DELIVERY SYSTEMS

D. B. Trushina, E. V. Shtykova, T. V. Bukreeva

A.V. Shubnikov Institute of Crystallography, Russian Academy of Sciences

In this paper nanostructured particles of calcium carbonate ( ) was prepared by mixing and solutions. After fabrication they were modified with silver nanoparticles using the silver-mirror reaction. Depending on reagent concentrations and the order of reagents addition core-shell system demonstrates different morphology and stability. Experimental observations showed that due to the porous structure calcium carbonate particles can be used as a template for obtaining the stabilized monodisperse silver nanoparticles with the size about 2-3 nm.
The adsorption of central anesthetic loperamide on the particles was studied by spectrophotometry. It was found that 0.77% of the drug was absorbed.

МОДЕЛИРОВАНИЕ МЕТОДОМ МОНТЕ-КАРЛО ПОДВИЖНОСТИ ЭЛЕКТРОНОВ ВБЛИЗИ СТОКА В КОРОТКОКАНАЛЬНЫХ МОП-ТРАНЗИСТОРАХ С МЕЛКИМИ И ГЛУБОКИМИ СТОКАМИ

О. Г. Жевняк

Белорусский государственный университет

MONTE CARLO SIMULATION OF ELECTRON MOBILITY IN SHORT CHANNEL MOSFETS WITH SHALLOW AS WELL AS DEEP DRAINS

O. G. Zhevnyak

Belarusian State University

In this paper Monte Carlo calculations of electron mobility in MOSFETs with 0.5, 0.25 and 0.1 m channel length as well as different values of drain depth are considered. The dependencies of electron mobility on drain depth in different section of device substrate are obtained. Results of simulation demonstrate extremum behavior from the changing of drain depth. That may be explained by the redistribution of electric field near the drain region.

ОБРАЗОВАНИЕ И РОСТ ЦЕНТРОВ КРИСТАЛЛИЗАЦИИ В СИЛЬНО ПЕРЕОХЛАЖДЕННЫХ СПЛАВАХ НА ОСНОВЕ АЛЮМИНИЯ

В.Ф. Башев, А.М. Овруцкий, А.С. Прохода, А.А. Есаулов

Днепропетровский национальный университет им. О. Гончара

FORMATION AND GROWTH OF NUCLEI IN STRONGLY UNDERCOOLED ALLOYS ON THE BASIS OF ALUMINUM

V.F.Bashev, A.M.Ovrutsky, A.S.Prokhoda, A.A.Esaulov

Dnepropetrovsk national university of O.Gonchar

Annotation. Formation and growth of crystallization centers of aluminum in amor-phous alloys Al90Ni10 and Al92,3Ni5Y2,7 have been studied by the molecular dynamics method. Local radial pair distribution functions were calculated for studying of struc-ture. Growth kinetics of the comparatively large aluminum crystals in the binary sys-tem is studied. Latencies of appearance of the first crystallization centre are found. The energies of interatomic interaction averaged locally in the centers of crystalliza-tion and also in the bulk of the amorphous phase are determined. It is researched how the size of crystallization centre influences its structure and the local interaction en-ergy. Formation of icosahedrons and their lifetimes are also studied.