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物理学报  2007 

Study on FN-DLC thin films:(Ⅲ) hydrophobic nature analysis
含氮氟化类金刚石(FN-DLC)薄膜的研究:(Ⅲ)疏水性能分析

Keywords: fluorinated diamond-like carbon films,hydrophobic nature,contact angle
氟化类金刚石膜
,疏水性,接触角

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Abstract:

Nitrogen doping of fluorinated diamond-like carbon (FN-DLC) films were deposited on p-type (100) silicon wafers at different deposition condition. The contact angle of water on the FN-DLC films surfaces was measured by a sessile-drop method. The surface morphology of films was characterized by atomic force microscopy (AFM). The Raman spectrum, infrared spectrum and X-ray photoelectron spectrum (XPS) demonstrate that the hydrophobic nature of FN-DLC films lies on chemistry structure, polarization intensity and roughness of films surface. As the ratio of sp~3/sp~2 decreases, the quantity of CF_2 and roughness of film surface increases, thus contact angle increases. Otherwise, contact angle decreases. The contact angle is correlated with the deposition condition, which low temperature, low radio frequency power and high flux ratio r(r=CF_4/CF_4 CH_4]) brings the contact angle to ascend.

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