4. Wearable Electronics & Other Research Works
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We are developing a smart denture with temperature-sensing capabilities using selective laser ablation technology with a femtosecond (fs) laser.
A thin gold film is deposited onto PMMA, a common denture material, and then selectively etched using laser processing. The processed sensor is then integrated into a 3D-printed denture. This system offers high stability and long-term wearability, making it easier for elderly individuals and patients to monitor their body temperature and food consumption activity.
Additionally, we fabricate a tongue pressure sensor by first creating laser-induced graphene (LIG) on a polyimide (PI) film using a UV nanosecond (ns) laser. The LIG is then transferred onto PDMS and embedded into a 3D-printed denture.
Tongue pressure directly affects food intake, making continuous monitoring essential for elderly individuals experiencing reduced muscle strength. Unlike traditional balloon-type sensors, our wearable tongue pressure sensor provides a more stable and convenient solution, allowing for continuous, equipment-free monitoring without requiring patients to bite into external devices.
(In collaboration with Professor Sang Wook Kang’s research group at KHU.)
We have successfully fabricated LIG on Kevlar, a material widely known for its bulletproof carbon fiber properties, using laser irradiation.
Leveraging this LIG-Kevlar platform, we have developed a range of wearable electronic applications, including voice recognition, body temperature monitoring, body motion sensing, ECG signal detection, and micro-supercapacitor (MSC) integration for LED activation.
Through these innovations, we demonstrate the potential of LIG-based wearable electronics, paving the way for advanced, multifunctional, and flexible sensor technologies.
(In collaboration with Dr. Soongeun Kwon at KIMM.)
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