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Wyszukujesz frazę "61.10.-i" wg kryterium: Temat


Wyświetlanie 1-6 z 6
Tytuł:
Application of Third Generation Synchrotron Source to Studies of Non-Crystalline Materials: In-Se Amorphous Films
Autorzy:
Burian, A.
Jabłońska, A.
Burian, A. M.
Le Bolloc'h, D.
Metzger, H.
Proux, O.
Hazemann, J. L.
Mosset, A.
Raoux, D.
Powiązania:
https://bibliotekanauki.pl/articles/2030649.pdf
Data publikacji:
2002-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.10.-i
61.43.Dq
Opis:
The local structure of vacuum evaporated In-Se amorphous films, containing 50, 60, and 66 at.% Se, was studied using differential anomalous X-ray scattering and extended X-ray absorption fine structure. Both intensity and absorption spectra were measured in the vicinity of the absorption K-edge of Se. The differential anomalous X-ray scattering data were converted to real space by the inverse Fourier transform yielding the differential radial distribution functions. The obtained results provide evidence for the presence of Se-In spatial correlations for In$\text{}_{50}$Se$\text{}_{50}$ and Se-In and Se-Se correlations for In$\text{}_{40}$Se$\text{}_{60}$ and In$\text{}_{34}$Se$\text{}_{66}$ within the first coordination sphere.
Źródło:
Acta Physica Polonica A; 2002, 101, 5; 701-708
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Curved Surfaces in Disordered Carbons by High Energy X-ray Scattering
Autorzy:
Burian, A.
Szczygielska, A.
Kołoczek, J.
Dore, J.
Honkimaki, V.
Duber, S.
Powiązania:
https://bibliotekanauki.pl/articles/2030692.pdf
Data publikacji:
2002-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.10.-i
61.10.Eq
61.46.+w
Opis:
Disordered carbons prepared by slow pyrolysis of saccharose and anthracene and subsequent heat treatment at 1000ºC and 2300ºC have been studied by high energy X-ray diffraction. Computer simulations of the powder diffraction patterns of fullerenes, nanotubes and carbon models have been compared with the experimental data after conversion to real space via the Fourier transform. The presence of fullerene- and nanotube-like fragments with non-six membered rings in the investigated samples has been deduced by detailed analysis of the radial distribution functions of the saccharose- and anthracene-based carbons and related to resistance to graphitization of the saccharose-based carbons and to stability of the growing crystallites in the case of the anthracene-based carbons. The obtained results are compared to high resolution electron microscopy and Raman studies.
Źródło:
Acta Physica Polonica A; 2002, 101, 5; 751-759
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interpretation of Differential Anomalous X-Ray Scattering Data for Amorphous Cd-As
Autorzy:
Burian, A.
Lecante, P.
Mosset, A.
Galy, J.
Tonnerre, J. M.
Raoux, D.
Powiązania:
https://bibliotekanauki.pl/articles/1931688.pdf
Data publikacji:
1994-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.70.Dm
61.10.-i
Opis:
The computational procedure, based on Warren's exact method for an amorphous sample with more than one atom, was developed to obtain the short-range order structural parameters from the differential anomalous X-ray scattering data, collected using the synchrotron radiation. The experimental differential radial distribution functions were fitted with the true distribution functions expressed in an analytical form and broadened by convolution with the pair functions. It was found that atoms in the amorphous Cd-As films remain almost tetrahedrally coordinated and the investigated alloys are chemically ordered.
Źródło:
Acta Physica Polonica A; 1994, 86, 4; 633-640
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radial Distribution Function Analysis of Carbon Nanotubes
Autorzy:
Szczygielska, A.
Jabłońska, A.
Burian, A.
Dore, J. C.
Honkimaki, V.
Nagy, J. B.
Powiązania:
https://bibliotekanauki.pl/articles/2014446.pdf
Data publikacji:
2000-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.10.-i
81.05.Tp
Opis:
Wide-angle X-ray scattering studies of carbon nanotubes produced by catalytic decomposition of acetylene on a supported Co catalyst are reported. The X-ray intensities were recorded up to maximum scattering vector K$\text{}_{max}$=24Å and then Fourier transformed to real space. Yielding the radial distribution functions of good spatial resolution were analysed by the model based on fitting procedures method. Detailed analysis of the experimental data by a least-squares fitting procedure shows that the local atomic structure exhibits the expected hexagonal network with the nearest-neighbour C-C distance of 1.41Å. Investigation of stacking nature of subsequent layers suggests the structure in which adjacent layers are arranged without spatial correlations with inter-tubule spacing of about 3.4Å.
Źródło:
Acta Physica Polonica A; 2000, 98, 5; 611-617
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural Studies of Carbon Nanotubes and Related Materials by Neutron and X-Ray Diffraction
Autorzy:
Dore, J.
Burian, A.
Tomita, S.
Powiązania:
https://bibliotekanauki.pl/articles/2014376.pdf
Data publikacji:
2000-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.46.+w
61.12.-q
61.10.-i
Opis:
X-ray and neutron diffraction measurements are presented for a number of carbon samples prepared by different techniques. The information obtained from diffraction studies is presented in relation to other types of investigation, particularly in relation to electron microscopy. The characteristics of the graphene sheets are discussed in relation to these features.
Źródło:
Acta Physica Polonica A; 2000, 98, 5; 495-504
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Does Carbon Prefer Flat or Curved Surfaces?
Autorzy:
Burian, A.
Dore, J. C.
Powiązania:
https://bibliotekanauki.pl/articles/2014367.pdf
Data publikacji:
2000-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.48.+c
61.10.-i
78.30.Na
Opis:
The presence of fullerene- and nanotube-like elements in carbons prepared from saccharose and anthracene by slow pyrolysis and then heat treated at 1000°C, 1900°C, and 2300°C has been revealed using Raman spectroscopy. High energy X-ray diffraction has been used to examine the effect on these carbons of heat treatment. Tendency to graphitization of the anthracene-based carbon and resistance to graphitization of the saccharose carbon will be considered in the light of the formation of curved graphitic networks and cages. The obtained results lead us to propose a model of the structure of non-graphitizing and graphitizing carbons.
Źródło:
Acta Physica Polonica A; 2000, 98, 5; 457-468
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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