STUDY OF CVD DIAMOND C(100) BY X-RAY-ABSORPTION SPECTROSCOPIES

Surface sensitive x-ray absorption fine structure measurements were ca rried out near the carbon K-edge on chemical vapor deposited (CVD) dia mond and natural diamond. Utilizing different methods, namely near edg e and extended x-ray absorption fine structure measurements (NEXAFS an d EXAFS), features were found in the spectra which were attributed to non-diamond coordination fractions, such as bulk C-H bonds, graphite-l ike and more diamond-like coordinated amorphous carbon domains. Both t echniques show that the non-diamond fractions consist mainly of diamon d-like amorphous carbon.