Three-dimensional (3-D) printing techniques have the ability to fabricate wearable sensors with customized and complex designs compared with conventional processes. The vat photopolymerization 3-D printing technique exhibits better printing resolution, faster printing speed, and is capable of fabricating a refined structure. Due to the lack of highly conductive photocurable resins, it is difficult to prepare sensors through vat photopolymerization 3-D printing technique.
