Affiliation:
1. Department of Mechanical Engineering The University of Tokyo Tokyo 113‐8656 Japan
2. Department of Mechanical Engineering Pusan National University Pusan 46241 Republic of Korea
3. Advanced Materials Convergence R&D Division Korea Institute of Ceramic Engineering and Technology (KICET) Jinju Gyeongnam 52851 Republic of Korea
4. Department of Mechanical Engineering Dong‐Eui University Busan 47340 Republic of Korea
Abstract
AbstractThe potential of laser‐induced graphene (LIG), recognized for its distinct attributes in diverse fields, has significantly grown. However, the creation of LIG using colorless polyimide (CPI) films remains unexplored. This research sheds light on the graphitization technique for generating LIG from CPI films via laser techniques, a process validated through ReaxFF simulations. It is also illustrated that CPI integrated with fluorine atoms possesses an elevated porous configuration, rendering it apt for high‐sensitivity, low‐detection limit pressure sensors. The pressure sensor, constructed with LIG derived from CPI, showcases superior performance metrics such as an exceptional sensitivity rate of 60.340 kPa−1 in low‐pressure ranges (1.0–1.5 kPa), prompt response and recovery intervals (27/36 ms), and commendable durability. The sensor's ability is further validated to precisely track human movements. Moreover, the study employs the LIG sourced from CPI as a dielectric‐to‐dielectric triboelectric nanogenerator (TENG), yielding a peak power output of 411.4 mW m−2 under a 40 MΩ load resistance. The CPI‐based LIG offers increased porosity in comparison to traditional LIG, which aids in superior functioning in pressure sensors and TENG devices. This research offers a fresh perspective on the application possibilities of CPI‐sourced LIG, notably in pressure sensors and energy harvesting devices.
Funder
National Research Foundation of Korea
Japan Society for the Promotion of Science
Precursory Research for Embryonic Science and Technology
Subject
Mechanical Engineering,Mechanics of Materials