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. 2013 Jul 16;105(2):463–472. doi: 10.1016/j.bpj.2013.06.002

Figure 4.

Figure 4

Exchangeable colloids on a micropatterned surface. (A) Fluorescence image of the pattern obtained by microcontact printing: (Bright squares) biotinylated PLL-g-PEG-FITC; (dark areas) covered with bare PLL-g-PEG. The cantilever is visible as shadow due to a high fluorescence background. The average forces on six adjacent squares probed with avidin-coated beads are indicated in [nN] with the respective standard deviation. (B) A typical curve recorded for an avidin-coated bead on PLLgPEG-biotin.