Fig. 4.

Representative SEM micrographs of bacteria on flat and patterned PMMA surfaces. Scale bars on left column = 10 μm. Scale bars on right column = 2 μm. The morphology and spread of bacterial cells were observed on [(a) and (b)] P600; [(c) and (d)] P300; [(e) and (f)] P200; and [(g) and (h)] flat control. While the bacteria remain rod-shaped on the flat PMMA, the bacteria on the pillars deflate as they drape across several pillars. There is evidence of leakage of cytoplasm in (b). Images (a), (b), (g), and (h) were taken at 2 kV. All other images were taken at 5 kV.