Fig. 1 | Nature Communications

Fig. 1

From: Control of capillary behavior through target-responsive hydrogel permeability alteration for sensitive visual quantitative detection

Fig. 1

The scheme of a target-responsive hydrogel film in capillary tube for visual quantitative detection. The soldiers in the picture represent the solvent molecules that can slowly permeate through the gel membrane, and the tanks in the picture represent the target molecules that can degrade the gel membrane. In the presence of cocaine, cocaine molecules can change the internal structure of DNA hydrogel, resulting in an increase in the permeability of the film and the flow rate of the solvent in the capillary. The higher the concentration of cocaine molecule is, the faster the flow rate is

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