Journal
SENSORS
Volume 19, Issue 22, Pages -Publisher
MDPI
DOI: 10.3390/s19224867
Keywords
laser-induced graphene (LIG); 355 nm pulsed laser; strain sensor; polyimide; polydimethylsiloxane (PDMS)
Funding
- Korea Institute for Advancement of Technology(KIAT) - Korea Government(MOTIE) [P0008763]
- National Research Foundation of Korea [10Z20130000004] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A laser-induced-graphene (LIG) pattern fabricated using a 355 nm pulsed laser was applied to a strain sensor. Structural analysis and functional evaluation of the LIG strain sensor were performed by Raman spectroscopy, scanning electron microscopy (SEM) imaging, and electrical-mechanical coupled testing. The electrical characteristics of the sensor with respect to laser fluence and focal length were evaluated. The sensor responded sensitively to small deformations, had a high gauge factor of similar to 160, and underwent mechanical fracture at 30% tensile strain. In addition, we have applied the LIG sensor, which has high sensitivity, a simple manufacturing process, and good durability, to human finger motion monitoring.
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