Figure 2 .

AFM image ofE. coliW strain imprints. The imprints are 1.5 to 2.5 μm large and about 100 nm deep, casted on the polyurethane substrate; scan scale, 7 × 5 μm; scan rate, 0.897 Hz.

Bajwa et al. Nanoscale Research Letters 2012 7:328   doi:10.1186/1556-276X-7-328
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