Figure 1.

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.

Shen et al. Nanoscale Research Letters 2012 7:268   doi:10.1186/1556-276X-7-268
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