Organizing DNAzymes into an Array

The DNAzyme used in these experiments cleaves itself in the presence of Cu²⁺. The idea behind the experiment is shown in the schematic below:

The pattern in the top section is a striped repeat of 32 nm. where the yellow stripes are from DNA hairpins and the white stripes are from the DNAzyme. Upon exposure to Cu²⁺, the DNAzyme cleaves and the stripe separation increases to 64 nm. The AFM patterns for the two states are shown below:

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