FIGURE 4.

(a) Works of detachment as a function of time for three experiments in which the same diatom was used to probe Intersleek (closed symbols) and mica (open symbols). Each point represents the average value of 256 measurements such as those (indicated by arrows) displayed in b and c for mica and Intersleek, respectively. The numbers 1–3 assigned to the diatoms refer to the corresponding numbers in Table 2. The time origin in panel a refers to the instant the diatom was attached to the cantilever.