%0 Journal Article
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%3 surface.pdf
%X The wettability of nanocrystalline diamond was systematically studied using water by sessile-drop method for films grown with different concentrations of methane addition in the Ar/CH4/H-2 mixtures. These films showed diamond grains agglomerate, also called ballas diamond, which presented a decrease on film roughness from 230 to 12 nm associated to a contact angle decrease from 978 to 738, as the methane concentration increased from 0.5 to 2.0 vol.%. Considering the wettability evolution is only due to a chemical surface modi. cation, it could be reasonably proposed that the progressive loss of the hydrophobic character is linked to the progressive increase of surface terminations with oxygen (carbonyl or carboxyl). This result is coherent with the observed from the deconvolution of XPS spectra, where the total oxygen amount increased from 5 to 14% and the sp(3)/sp(2) carbon ratio decreased from 7.6 to 6.9 as the methane concentration increased. Moreover, the stress behaviour, analyzed by Raman spectroscopy, was explained pointed out the nanodiamond/nanographite transition process due to the methane increase in the gas phase.
%@mirrorrepository sid.inpe.br/mtc-m18@80/2008/03.17.15.17.24
%8 Apr.
%N 13/14
%T Surface characterization of NCD films as a function of sp(2)/sp(3) carbon and oxygen content
%@secondarytype PRE PI
%K Nanocrystalline, Diamond film, Contact angle measurements, X-ray photoelectron spectroscopy (XPS), Atomic force microscopy (AFM), Raman scattering spectroscopy.
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%@group LAS-CTE-INPE-MCT-BR
%@group LAS-CTE-INPE-MCT-BR
%@group
%@group LAS-CTE-INPE-MCT-BR
%@group LAS-CTE-INPE-MCT-BR
%@secondarykey INPE--PRE/
%@secondarymark B2_ASTRONOMIA_/_FÍSICA B2_CIÊNCIAS_BIOLÓGICAS_I B2_CIÊNCIAS_BIOLÓGICAS_II B1_ECOLOGIA_E_MEIO_AMBIENTE B1_ENGENHARIAS_II A2_ENGENHARIAS_III B1_ENGENHARIAS_IV A2_INTERDISCIPLINAR B2_MATEMÁTICA_/_PROBABILIDADE_E_ESTATÍSTICA B1_MATERIAIS B1_MEDICINA_III B1_ODONTOLOGIA B3_QUÍMICA
%@issn 0169-4332
%2 sid.inpe.br/mtc-m18@80/2009/07.02.19.44.56
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%B Applied Surface Science
%P 6565-6570
%4 sid.inpe.br/mtc-m18@80/2009/07.02.19.44
%D 2009
%V 255
%@doi 10.1016/j.apsusc.2009.02.041
%A Azevedo, Adriana Faria,
%A Matsushima, J. T.,
%A Vicentin, F. C.,
%A Baldan, Maurício Ribeiro,
%A Ferreira, Neidenei Gomes,
%@dissemination WEBSCI; PORTALCAPES; COMPENDEX.
%@area FISMAT