0.1. Selective coating of the body
We deposit gold on the polystyrene-bead to make the body that have Au hemispherical area.
Next, We change the direction of beads, and deposit chromium on the body. Then we pick up polystyrene-bead, which are deposited by quarter gold and half chromium. By chromium capping, this "head part" is prevented DNA strands to conjugate, so platinum only mounted at the rear.
Therefore, platinum particles can't conjugate onto chromium hemisphere. As a result, the Biomolecular Rocket starts to move toward chromium hemisphere heading.
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