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Pages:     | 1 | 2 || 4 | 5 |   ...   | 68 |

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Termoelectric Nanostructure Materials Anatychuk L.I., Vyhor L.M.

Institute of Termoelectric, Chernivtsi,Ukraine The trends of thermoelectric material science development are analyzed.

Possibility for enhancing the figure of merit of nanostructured materials is substantiated. Results of theoretical and experimental research on thermoelectric properties of nanofilms, nanowires and nanocomposites are given. Possibilities for expansion of practical applications of thermoelectricity through the use of nanostructured materials are demonstrated.

As-S(Se) .., .., .., .., . , , , , , . , - AsS(Se) [1,2], .

AsS(Se) (-)As () | , As3+ | [As-S(Se)] (.) (+) (1) 300-380 .

XI ICPTTFN

(1) . KCl AsCl3.

As-S(Se) . (~10-2 ) .

( 2000 .) .

(1) , . , As-S 6 45 %As, As-Se 0 60 %As.

As-S(Se). - .

As2S3, AsS, As2Se3 AsSe.

, , .

2. - .

. . . .. .. .: , 1979. 339

3. . . , . . , , ..., 2004, 368.

Investigation OF As-S(Se) Systems by Method EMF in Glassy-Like and Crystallic States Babanly M.B., Ilyasly T.M., Veliyeva Q.M., Muradova Q.V., Aliyev Z.S.

Baku State University, Baku, Azerbaijan This activity is devoted to the studying of the system As-S(Se) in crystal and amorphous states by EMF measurement of the concentration chains type (-) As (s) | liq. el.,As3+ | [As-S(Se)] (s) (+)

XI ICPTTFN

in 300-380 K temperature interval. The solution of KCl in glycerin with addition of ~0,5 mass.% AsCl3 used as electrolyte in chains. As the right electrodes are used the amorphous and equilibrium crystal alloys.

From the EMF data are calculated the partial molar thermodynamic functions (G, H, S ) of arsenic in glass and crystal phases, the standard thermodynamic functions of formation of compounds As2S3, AsS, As2Se3 and AsSe, as well as integral thermodynamic functions of mixture of glasses.

With the comparison of the thermodynamic characteristics of As2S3, As2Se3 and AsSe compounds in crystal and amorphous states were calculated the thermodynamic functions of crystallization of glasses.

   

( , -, - ) ( ) (110). 䳿 . 䳿 2 S=0,75 䳿 0,001. C 2000 .

䳿, 2, (10-3-10-5 ), . 105 L 4- . , . 300 900 . , 2, 3, 1500 , 2000 . , , . -.

,

XI ICPTTFN

, . , , , ( ~3 eV ~5 eV ). ( 0,13 eV), . , .

. . , (STM, HREELS), , , - ﳿ . .

, . .

Formation of the nanolayer oxide film on the Mo(110) surface Balakin D.Yu., Osovskii V.D., Petrova N.V., Ptushinskii Yu.G., Yakovkin I.N.

Institute of Phisics NASU, Kyiv, Ukraine The formation of oxide film on the Mo(110) surface have been studied experimentally and theoretically. It is found that the sticking coefficient of O molecules on the stage of oxide formation is of 10-8-10-5, depending on the substrate temperature. The process of the oxide formation does not reveal a complete saturation and is activated in character. It is shown that the formation of molecules of oxides takes place already at the stage of adsorption. Basing on density-functional calculations, an atomistic model of the forming oxide layer is suggested.




140 .


   

, , .., ..

. . . ,, , , () (), , () (ͥ), , ' () , , . , , .

' - , ( ) ͥ - . (, - ͥ).

( ) 䳿, , ' , , ( ). ֳ ( ), , , . ' , , . .

(~ ), - (, ) , ( ) [1].

.

1. .. , .. , .. .

XI ICPTTFN

䳿 㳿. -, . 2007. 316 .

Radiation and thermal hardness of think layers, heterosystems and nanostructures produced on the basis of elementary semiconductors and compound semiconductors Baranskii P.I., Gaidar G.P.

V. E. Lashkaryov Institute of Semiconductor Physics NAS of Ukraine, Kyiv, Ukraine Institute for Nuclear Research of NAS of Ukraine, Kyiv, Ukraine Specific features of nanoobjects and nanostructures, for example: the developed surface and as a result increased chemical reactivity; the high level of discontinuity results in lack of lattice constant and disturbance translation symmetry; the size of intrinsic variations of potential may be same order with inter-atomic distance that prejudices the appropriateness of effective mass method; etc. The presence of huge mechanical stress and discrepancy of thermal expansion coefficient can stimulates the structure degradation processes under changes of temperature condition. The preventive measures to decrease the rate of degradation processes in the nanostructures will be discussed.

.., .., .., .., .., .A., ..

, , . .. , , 䳿 , .

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XI ICPTTFN

10-14 10-10 . .

.

Femtooptics of nanocomposites based on noble metals Blonskyi I.V., Dmitruk I.M., Dmytruk A.M., Kadan V.M., Korenyuk P.I., Pavlov I.A., Alekseenko A.A.

Institute of Physics NAS of Ukraine, Kyiv, Ukraine Pavel Sukhoi State Technical University of Gomel, Gomel, Belarus Using time-resolving techniques, influence of dynamic Kerr effect on the temporal evolution of surface plasmon parameters in metallic nanoparticles has been analyzed. Filamentation and accompanying phenomena (superluminal translation of the pulse maximum, light expulsion from the filament core) were investigated in matrix media.

.., ..



Pages:     | 1 | 2 || 4 | 5 |   ...   | 68 |
 
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׸


 
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