Core-level photoabsorption characterization of diamond and carbon films
- Lawrence Livermore National Lab., CA (United States); and others
We have used synchrotron radiation core-level photoabsorption to characterize the electronic structure and morphology of carbon thin-films and determined the relative ratio of sp2 vs. sp3 bonding. The diamond, diamond-like, and carbon films characterized were prepared by a variety of methods including sputtering, CVD, microwave plasma CVD, and laser ablation. We have also measured these films using Raman spectroscopy and have found that in cases where the domain size of the crystallites in the carbon films was nanoscopic (less than 100 nm), Raman spectroscopy gave indeterminate results. In these cases, as well as with larger crystallite size films, core-level photoabsorption was able to unambiguously identify the bonding in the film. We will present photoabsorption data obtained from these materials. These experiments and prospects for other experiments that can identify the unique electronic properties and bonding of such novel thin films will be discussed.
- DOE Contract Number:
- AC03-76SF00098; W-31109-ENG-38; W-7405-ENG-48
- OSTI ID:
- 539097
- Report Number(s):
- CONF-960807--
- Country of Publication:
- United States
- Language:
- English
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