The solid-liquid contact electrification based self-driving chemical sensor includes a container, a contact liquid, an electrode, a solid triboelectric layer, a rectifier, a load and displacement device. The contact liquid is contained in the container. The electrode can be actively or passively placed in the container to immerse or leave the contact liquid. The solid triboelectric layer surrounds and covers a surface of the electrode. The solid triboelectric layer includes a sensing layer and a reacted sensing layer that reacts to the target analyte. The rectifier and the load are connected to the electrodes. The displacement device is connected to the electrode or the container to perform periodic reciprocating motion, so that the solid triboelectric layer contacts and separates from the contact liquid, thereby causing surface charge transfer to generate an electrical output signal. |