This paper describes the fabrication process of laser induced graphene (LIG) and its transfer method on to a flexible and stretchable PDMS substrate. By irradiating CO2 laser on a polyimide(PI) film surface, a localized high temperature is created, resulting in a three-dimensional porous graphene network structure with good conductivity. This LIG electrode is relatively easy to fabricate and since it is very weak the LIG electrode was transferred to a flexible PDMS substrate to increase the sturdiness as well as possible use in flexible applications. Sheet resistance, thickness, and electrochemical activity of the fabricated in-situ LIG electrodes have been examined and compared with the LIG electrodes after transferring to PDMS elastomer. The properties of the LIG electrodes were also examined depending on the CO2 laser power. As the irradiated laser power increased, the LIG electrode resistance decreases and the LIG electrode thickness increased. At 4.8 W of laser power, the average sheet resistance and thickness of the fabricated LIG electrodes were approximately 31.7 Ω/ □ and 62.67 μm, respectively. Moreover, the electrochemical activity of the fabricated LIG electrode at 4.8 W of laser power showed a high oxidation current of 28.2 μA after transferring to PDMS.
|Number of pages||7|
|Journal||Transactions of the Korean Institute of Electrical Engineers|
|Publication status||Published - 2018 Mar|
Bibliographical noteFunding Information:
This research was supported by Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Science, ICT & Future Planning (2017R1A2B 4009088, “Development of IoT-based wearable multi-sensor for human sweat analysis using laser-induced graphene electrode”)
© Copyright The Korean Institute of Electrical Engineers.
- Flexible sensor
- Laser induced graphene
ASJC Scopus subject areas
- Electrical and Electronic Engineering