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Wyszukujesz frazę "Mirić, M." wg kryterium: Autor

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Optical Characterization of Graphene and Highly Oriented Pyrolytic Graphite
    Autorzy:
    Kostić, R.
    Mirić, M.
    Radić, T.
    Radović, M.
    Gajić, R.
    Popović, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1795772.pdf
    Data publikacji:
    2009-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    63.20.D-
    78.67.Wj
    81.05.U-
    Opis:
    We present a symmetry analysis of allowed infrared and Raman modes in graphene and highly oriented pyrolytic graphite. Surface structure for highly oriented pyrolytic graphite is examined using atomic force microscopy. As experimental tools, we used infrared spectroscopic ellipsometry in order to investigate the pseudodielectric function of highly oriented pyrolytic graphite in the mid-infrared range (500-7000 $cm^{-1}$) and Raman spectroscopy to investigate the influence of layers number decrease. As a result, we propose a method for an experimental verification of graphene.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 4; 718-721
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optical Characterization of Laser-Synthesized Anatase $TiO_{2}$ Nanopowders by Spectroscopic Ellipsometry and Photoluminescence Measurements
    Autorzy:
    Šćepanović, M.
    Grujić-Brojčin, M.
    Mirić, M.
    Dohčević-Mitrović, Z.
    Popović, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1795613.pdf
    Data publikacji:
    2009-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.07.Wx
    78.67.Bf
    73.22.-f
    07.60.Fs
    78.55.-m
    Opis:
    Nanosized titania $(TiO_{2})$ is synthesized by laser-induced pyrolysis using $TiCl_{4}$ as a liquid precursor. X-ray diffraction and Raman scattering confirmed anatase structure of $TiO_{2}$ nanocrystals. The dielectric function ε(ω) of $TiO_{2}$ nanopowders has been determined by spectroscopic ellipsometry in the energy range from 1.5 to 6 eV at room temperature. The features observed in ε(ω) have been fitted to analytical line shapes by using the second derivatives of experimental spectra. The energies corresponding to different interband electronic transitions have been determined. Photoluminescence measurements have been carried out in vacuum for T = 20 K and T = 300 K. Under laser irradiation with sub-band gap photon energy, anatase nanocrystals have displayed strong visible photoluminescence emission. In this broad photoluminescence band different variations of line shape and position with excitation energy and temperature are observed for nanopowders with different crystallite size, pointing out to the various electronic transitions mediated by defect levels within the band gap.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 4; 603-606
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ellipsometric Measurements of Plastically Deformed Copper
    Autorzy:
    Mirić, M.
    Rudolf, R.
    Anžel, I.
    Hadžić, B.
    Romčević, M.
    Trajić, J.
    Romčević, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1795714.pdf
    Data publikacji:
    2009-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.20.-e
    78.40.Kc
    68.35.Ct
    Opis:
    Chemically pure copper (99.99) prepared in the sample of square cross-section (10×10 $mm^{2}$) and length about 50 mm was extremely plastically deformed with the repeated application of equal channel angular pressing. Equal channel angular pressing was applied as an effective technique for producing bulk nanoscaled structures. It is well known that severe plastic deformation of metallic materials often leads to microstructure with ultrafine grains and cross-sections which remain about equal before and after deformation. Optical properties of the sample were studied using spectroscopic ellipsometry in UV-VIS range. The parameters of the sample like copper oxide and surface roughness overlayer were calculated using two-film model together with the Bruggeman effective medium approximation.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 4; 715-717
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling the Variable Angle Reflection and Transmission from Metamaterial Slabs
    Autorzy:
    Isić, G.
    Vasić, B.
    Mirić, M.
    Jokanović, B.
    Bergmair, I.
    Gajić, R.
    Hingerl, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1795623.pdf
    Data publikacji:
    2009-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    41.20.-q
    42.25.Bs
    42.70.Qs
    Opis:
    We consider metamaterial slabs composed of perfectly conducting split-ring resonators. Assuming bianisotropic constitutive relations, we describe an S-parameter retrieval method that allows us to obtain the full material parameter tensors from numerically calculated S parameters. The retrieval has been done for various angles of incidence, ranging from 0° to 75°. It has been found that the parameters depend on the angle of incidence, but that this dependence is relatively small.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 4; 631-634
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optical Properties of Plastically Deformed Copper
    Autorzy:
    Trajić, J.
    Rudolf, R.
    Anžel, I.
    Romčević, M.
    Lazarević, N.
    Mirić, M.
    Lazarević, Z.
    Hadžić, B.
    Romčević, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1537910.pdf
    Data publikacji:
    2010-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.20.-e
    78.30.j
    78.40.kc
    Opis:
    Pure copper (99.99), prepared in the sample of square cross-section (10 × 10 $mm^{2}$) and length about 50 mm, was extremely plastically deformed with the repeated application of Equal Channel Angular Pressing (ECAP). ECAP was applied as an effective technique for producing bulk nano-scaled structures. Optical properties of the sample were investigated using Raman spectroscopy. Two types of lines: narrow (with width of ≈ 7 $cm^{-1}$) and wide ( ≈ 40 $cm^{-1}$) are registered. Existence of two types of lines indicates that in the specimen exists nano-sized crystal structures of both Cu and CuO related with three dimensional amorphous boundary spaces, which indicates that plastic deformation of the sample did not lead to total amorphisation of the specimen.
    Źródło:
    Acta Physica Polonica A; 2010, 117, 5; 791-793
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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