Figure 9

SEM images of carbon nanotube forests. (a) As-grown forest prepared by PECVD with nanotube diameter of 50 nm and a height of 2 μm, (b) PTFE-coated forest after HFCVD treatment, and (c) an essentially spherical water droplet suspended on the PTFE-coated forest. Reprinted with permission from American Chemical Society. Copyright (2003).