This study aimed to explore lignin as a naturally occurring aromatic precursor for the synthesis of LIG and further fabrication of ultrasensitive strain sensors for the detection of small deformations. One-step direct laser writing (DLW) induced high quality porous graphene, so called laser induced graphene (LIG) from kraft lignin. The novel LIG transfer was facilitated by spinning coating followed by water lifting, leading to full retention of porous graphene onto the elastomeric substrate (i.e., Dragon Skin<sup>TM</sup>). An electrode based on the LIG-embedded Dragon Skin<sup>TM</sup> was facilely fabricated. The strain sensor was shown to be highly sensitive to small human body motions as well as tiny deformations caused by vibrations. Overall, the lignin-derived LIG can serve as excellent piezoresistive materials for wearable, stretchable, ultrasensitive strain sensors with applications in human body motion monitoring and sound-related applications.

Laser-induced graphene from lignin for wearable, stretchable, and ultrasensitive strain sensors

Fall 2022 abstracts, posters, and presentations will launch in mid-September.

ACS Fall 2022

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.