Gradient Technology for High-Throughput Screening of Interactions between Cells and Nanostructured Materials

Figure 2

AFM height images of porous silicon coated with a plasma polymer gradient. (a) Hydrocarbon end (position 1 mm). (b) Hydrocarbon/carboxylic acid combined (position 7 mm) and (c) carboxylic acid end (position 13 mm).

(a)

(b)

(c)