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. 2012 May 24;7(1):268. doi: 10.1186/1556-276X-7-268

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Copyright ©2012 Shen et al.; licensee Springer.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Optical images of samples before and after CF₄plasma treatment. ( a, c) Optical images demonstrating the morphologies of as-prepared samples before CF₄ plasma treatment. (b) Optical image of the sample in (a) after 3 s of CF₄ plasma treatment. (d) Optical image of the sample in (c) after 5 s of CF₄ plasma treatment.