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1.

Prisedsky V. V. 
The joint influence of cation and oxygen nonstoichiometry on superconducting properties in 123 cuprate [Електронний ресурс] / V. V. Prisedsky, S. V. Vasiliev, N. V. Markova, I. V. Mysnik, M. M. Ermolov, V. V. Chabanenko // Наукові праці Донецького національного технічного університету. Серія : Хімія і хімічна технологія. - 2013. - Вип. 1. - С. 24-35. - Режим доступу: http://nbuv.gov.ua/UJRN/Npdntu_chem_2013_1_3
As shown earlier, there is a "slow" constituent (<$E gamma>) into oxygen nonstoichiometry in superconducting 123-cuprates doped with rear-earth elements. The aim of this paper is to study possible effect of changing "slow" oxygen content on electrophysical properties of HTSC cuprates. Magnetization of Sm-doped samples YBa1,90Sm0,10Cu3Ox was measured in a vibrating sample magnetometer in scanning magnetic field and temperature. Two series of samples <$E roman {YBa sub 1,90 Sm sub 0,10 Cu sub 3 O sub {6+ delta + gamma}}> were prepared for measurements from the same batch of material: with maxim (<$Egamma sub max~=~0,10>) and minimum (<$Egamma sub min~=~0,00>) values of "slow" oxygen content and corresponding to formulas YBa1,90Sm0,10Cu3O7,07 and YBa1,90Sm0,10Cu3O6,97 respectfully. Both types of samples were obtained from the same batch of sintered material. Samples (I) were brought to equilibrium at <$E720~symbol Р roman C> (lower than Tb1) to maximize the "slow" oxygen content: <$E gamma sub max~=~0,10>. Then they were cooled to <$E400~symbol Р roman C> and kept at this temperature for 1 h to maximize "quick" oxygen content. The final total oxygen content in the samples of this series was established at x (I) = 7,07 (YBa1,90Sm0,10Cu3O7,07. Samples (II) were brought to equilibrium at <$E900~symbol Р roman C> (above Tbb2) to minimize the "slow" oxygen content: <$Egamma sub min~=~0,00> and then they were rapidly (in less then 10 min) cooled to and kept at <$E400~symbol Р roman C> for 1 h. The final total oxygen content in the samples of this series was equal to x (II) = 6,97 (YBa1,90Sm0,10Cu3O6,97. The study of magnetic hysteresis in these samples shows that additional oxidation with respect to "slow" component produces HTSC with higher both the critical temperature Tc and intragrain critical current density Jcg in ceramic specimens. The maximum value of <$Eroman {J sub cg~symbol Ы~3~cdot~06~A "/" cm sup 2}> in untextured ceramic specimens was observed.
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2.

Volkova E. I. 
Carbon nanotubes and their properties in the course on nanomaterials for engineering students [Електронний ресурс] / E. I. Volkova, V. V. Prisedsky // Наукові праці Донецького національного технічного університету. Серія : Хімія і хімічна технологія. - 2013. - Вип. 1. - С. 186-193. - Режим доступу: http://nbuv.gov.ua/UJRN/Npdntu_chem_2013_1_27
The article describes the sequence of presentation of the basic concepts and achievements of nanotechnology, nanomaterials types, the core technologies of their formation, methods of investigation of nanostructures, the basic physical and chemical properties of nanomaterials, the latest advances in the use of nanomaterials and nanotechnologies in various branches of engineering. In the lecture course, students are introduced to the basic concepts and ideas of nanotechnology and nanomaterials, their classification and basic properties, methods of nanostructures' forming. In the theoretical material of the lecture course the latest achievements in the field of nanomaterials are considered with the focus on graphene, carbon nanotubes and fullerenes. All of these materials are constructed with carbon atoms. Listeners' attention is drawn to the fact that certain special arrangement of carbon atoms can drastically change the properties of the material if created with the specific arrangement of atoms. A necessary condition for such a review is appropriate schematic arrangement of atoms. Lecture material is related to the latest developments in nanotechnology, and is divided into teaching units in line with some of the brightest main results obtained in such critical areas as nanotechnology: nanobiology, nanomaterials, nanochemistry, nano, nanoengineering, nanoelectronics, nanoenergetika, nanotechnology safety.
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