Spatio-temporal control of rotors via a cascade reaction (IMAGE)
Caption
Animation from simulation demonstrating spatio-temporal control of rotors via a cascade reaction. GOx-coated rotor (magenta) lies on the left side of the chamber, while CAT-coated rotor (green) lies on the right side. Background color map indicates spatial distribution of H<sub>2</sub>O<sub>2</sub> in the solution at y = 3mm for side views and at z = 0.4 mm for top views. Introduction of D-glucose in the solution activates the GOx-coated rotor, which morphs into a 3D structure and starts rotating spontaneously. CAT-coated rotor stays flat and stationary. H<sub>2</sub>O<sub>2</sub> is produced by the first reaction, constituting the first step of the cascade reaction. In the presence of H<sub>2</sub>O<sub>2</sub>, CAT-coated rotor becomes active and starts rotating, while the GOx-coated rotor becomes flat and stationary as glucose in the solution is depleted. With time, H<sub>2</sub>O<sub>2</sub> in the solution is also depleted and consequently, the motion of the CAT-coated rotor stops and sheet becomes flat.
Credit
A. Laskar
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