Organic Electrochemical Transistor based on Polypyrrole/Crosslinked Chitosan/Nylon Fibers

Glutaraldehyde (GA) crosslinked chitosan (CHIT) was modified on nylon fibers. Afterwards, pyrrole was in-situ polymerized on the surface of the CHIT/Nylon fiber. The SEM and FT-IR results show that the functional fiber is successfully prepared, and the obtained polypyrrole (PPy) presents nanorods morphology on the fiber surface. The mechanical properties of the fibers were studied by Instron. The organic electrochemical transistors based on PPy/Nylon fiber, PPy/CHIT/Nylon fiber, and PPy/GA-CHIT/Nylon fiber as channels were prepared and their transistors performance was compared. It is found that PPy/GA-CHIT/Nylon fiber-based transistor has great output, transfer, transient curves, and excellent transconductance of 6.8 mS, providing a new platform for the field of wearable devices. Furthermore, the study introduces chitosan material with excellent biocompatibility, which makes prepared transistors also have potential applications in the field of biosensing.