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Seminars

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  • Title:Triboelectrification as a potential candidate for the development of self-powered healthcare applications
  • Start Date/Time:2019-04-23 / 12:00
  • End Date/Time :2019-04-23 / 13:00
    • Speaker:Prof. Zong-Hong Lin (NTHU)
    • Place:Lecture Room A of NCTS, 4F, 3rd General Building, Nat'l Tsing Hua Univ.
    • Host:Prof. Lee-Wei Yang (NTHU)
    • Abstract:Contact electrification, also called triboelectrification, is an old physical phenomenon but now has become a new effective tool for the development of energy harvesting devices and self-powered sensors. In our recent studies, we have demonstrated different self-powered healthcare applications based on the triboelectrification-based devices. We firstly utilized those devices to harvest biomechanical energy from human motions and powered fiber-based electrochemical sensors for the detection of bioanalytes. As demonstrated in this study, the as-prepared self-powered sensing system could detect the glucose and lactate concentration in human perspiration, which can be an ideal wearable device for end users who seek real-time monitoring of their physical condition. This study concludes with a proposal for noninvasive biosensors, which provide boundless potential for future cross-field applications. Then we directly fabricated transparent, flexible, and biocompatible textile-based devices by using chitosan-based hydrogels. We surprising found that the output characteristics of the chitosan-based devices are notably stable under various humidity conditions. More importantly, the chitosan-based devices can be combined with commercial textiles to realize self-powered sensors, which are capable of detecting humidity, sweat, and gait phase. This work demonstrates noticeable progress in utilizing multifunctional textiles for potential applications in energy harvesters and self-powered sensors, which will shed light on future self-powered smart clothes and healthcare sensor systems Finally, we proposed a self-powered active disinfection system controlled by human motions. The system is mainly composed of a multilayered triboelectrification-based device for the harvesting of biomechanical energy and conductive fabrics as electrodes for the wearable disinfection system. The working principle of the system is based on hybrid effects of H2O2 production and electroporation, which provide good disinfection performance toward gram-negative Escherichia coli (E. coli) and gram-positive Staphylococcus aureus (S. aureus). Because of the fiber-based structure in the disinfection device and the shoe-embedded design of the triboelectrification-based device, our proposed self-powered active disinfection system can be easily integrated into commercial textiles to fabricate smart clothes to combat pathogenic bacteria. 

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