Optical Properties of the Rapid Annealed Oxygen-Doped Diamond-Like Carbon Film

Abstract

The amorphous oxygen-doped diamond-like carbon films were prepared by pulsed laser deposition. Compared with the pure diamond-like carbon film, there were much less graphite clusters on the surfaces of the oxygen-doped diamond-like carbon films, and the average transmission of the oxygen-doped diamond-like carbon films in the medium infrared band increased. However, some new absorption peaks in the infrared spectra of the oxygen-doped diamond-like carbon film were generated. Rapid annealing was experimented to remove the absorption peaks. XPS analysis showed that the fractions of the C–O and C=O bonds that generated the new absorption peaks were reduced more than the fractions of [Formula: see text] bonds by rapid annealing at 400[Formula: see text]C, and the absorption peaks in the medium infrared spectra decreased. It indicated that rapid annealing at right temperature during the right time could reduce greatly the absorption in the medium infrared band of oxygen-doped diamond-like carbon films.

Synthesis of Diamond-Like Carbon Nanofiber Films

“…Unlike heating at 350 °C, heating at 400 °C completely modified the morphology of the nanofiber film and the nanofiber structure was no longer present; the nanofiber film was transformed into a buckled film (Figure S9). These reductions of O concentrations by annealing DLC nanofiber film are comparable to the results observed for DLC films. , …”

“…These reductions of O concentrations by annealing DLC nanofiber film are comparable to the results observed for DLC films. 45,46 Cu was not detected by either XPS or SEM-EDS (Figures 6b and S3). The typical detection limit of SEM-EDS is 0.1 to 0.3 wt % 47 and of XPS is 0.1 to 1 atom %, 48 indicating that the Cu concentration is very low within the film.…”