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  • Title: Long-lasting hydrophilicity on nanostructured Si-incorporated diamond-like carbon films.
    Author: Yi JW, Moon MW, Ahmed SF, Kim H, Cha TG, Kim HY, Kim SS, Lee KR.
    Journal: Langmuir; 2010 Nov 16; 26(22):17203-9. PubMed ID: 20923155.
    Abstract:
    We investigated the long-lasting hydrophilic behavior of a Si-incorporated diamond-like carbon (Si-DLC) film by varying the Si fraction in DLC matrix through oxygen and nitrogen plasma surface treatments. The wetting behavior of the water droplets on the pure DLC and Si-DLC with the nitrogen or oxygen plasma treatment revealed that the Si element in the oxygen-plasma-treated Si-DLC films played a major role in maintaining a hydrophilic wetting angle of <10° for 20 days in ambient air. The nanostructured patterns with a roughness of ∼10 nm evolved because of the selective etching of the carbon matrix by the oxygen plasma in the Si-DLC film, where the chemical component of the Si-Ox bond was enriched on the top of the nanopatterns and remained for over 20 days.
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