Characterization of nanocrystalline diamond films by core-level photoabsorption

2019-10-10 12:33:23

films spectra core bonding diamond

责任者: Gruen, D.M.;Krauss, A.R.;Zuiker, C.D.;Csencsits, R.;Terminello, L.J.;Carlisle, J.A.;Jimenez, I.;Sutherland, D.G.J.;Shuh, D.K.;Tong, W.;Himpsel, F.J. 单位: Div. of Mater. Sci. & Chem., Argonne Nat. Lab., IL, USA 来源出处: Applied Physics Letters(Appl. Phys. Lett. (USA)),1996/03/18,68(12):1640-2 摘要: Core-level photoabsorption has been used to determine the sp2 and sp3 bonding content of nanocrystalline diamond thin films grown using C60 or CH4 precursors. The C(1s) absorption spectra show clear bulk diamond excitonic and sp3 features with little evidence of sp2 bonding, while the Raman spectra measured from these same films are ambiguous and indeterminate. This result can be attributed to the local structure (near-neighbor bonding) sensitivity of core-level photoabsorption that is insensitive to domain size, unlike Raman spectroscopy 关键词: core levels;diamond;excitons;nanostructured materials;plasma CVD coatings;Raman spectra;thin films;visible spectra;diamond;nanocrystalline films;core-level photoabsorption;sp3 bonding content;sp2 bonding content;thin films;exciton;Raman spectra;C