Figure 4.

Dielectrophoretic manipulation of gold nanoparticle-conjugated six-helix bundles. (a) Schematic representation of the positive DEP manipulation. (b) TEM images of gold nanoparticle-modified six-helix bundles. (c) Resulting DNA origami structure arrangement as a function of time at 1·10⁶ V/m and 16 MHz. Inverted fluorescence microscopy image after 16 min (left) and 26 min (right) ac field application. (d) Inverted fluorescence microscopy images of the trapping behavior during on/off-switching of the ac field.