Figure 6

(a) C1s and (b) O1s spectra of UNCD films:(ai and bi) are C1s and O1s of UNCD(6%H2); (aii and bii) are C1s and O1s of UNCD(0%H2) films, respectively, (c) differential CKLL spectra of: (ci) highly oriented pyrolytic graphite (cii) UNCD(0%H2) (ciii) UNCD(6%H2), and (civ) polyethylene.