Visual Chemical Detection Mechanism by Liquid Gating System with Dipole‐Induced Interfacial Molecular Reconfiguration

Chemical detection has a wide range of applications. The alert of the existence of a certain substance is so vital that new detection mechanism with features such as low‐cost, accessibility and visual markers readily‐available are in demand. Here we report a liquid gating based chemical detection mechanism, which has a dynamic gas/liquid interface due to dipole‐induced interfacial molecular reconfiguration. The mechanism exhibits a sensitive relationship between dipole force‐induced interfacial molecules' rearrangement and transmembrane gating behavior. These features can be utilized to create visual markers to detect, converting the analyte‐mediated interfacial interaction to pressure‐driven marker movement. This "green" detection mechanism requires no input electrical energy and has readily available markers for anyone to observe directly. We envision this new mechanism opens a window for more in‐depth exploration of combining liquid gating mechanism and detection mechanism.

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