A laser-assisted method was used to deposit diamond-like carbon (DLC) films on the apexes of tungsten tips under laser irradiation. The deposition process was found to be strongly dependent on tip sharpness. Simulation results indicated that an optically-enhanced region was formed at the apex region during laser irradiation. The enhancement factor dropped when the tip curvature radius was increased and aspect ratio was decreased. It was suggested that the two modes in the process of DLC deposition on nanotips under different laser fluences were like local apex DLC deposition under low laser fluences and phase-graded DLC deposition under high laser fluences.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)