Thin-film samples (d-40 nm) of tetrahedral amorphous carbon (ta-C) deposited by filtered cathodic vacuum arc (FCVA) were implanted with Ga+ at ion energy E = 20 keV and ion fluences D = 3 × 1014÷3 × 1015 cm2 and N+ with the same energy and a dose D = 3 × 1014 cm-2. The Ga+ ion beam induced a structural modification of the implanted material. This resulted in a considerable change of its structural properties, manifested as the formation of a new phase under non-equilibrium conditions, which could be accompanied by considerable changes in the ta-C films optical properties. The N+ implantation also resulted in a modification of the surface structure. These effects were explored using transmission (TEM) and scanning (SEM) electron microscopy.
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Berova, M., Sandulov, M., Tsvetkova, T., Karashanova, D., Boettger, R., & Bischoff, L. (2016). Structural modification of Ga+ and N+ ion implanted ta-C films. In Journal of Physics: Conference Series (Vol. 700). Institute of Physics Publishing. https://doi.org/10.1088/1742-6596/700/1/012035