Kamilya Tapas, Han Doohyun, Shin Jaehee, Kwon Soongeun, Park Jinhyoung
Department of Mechatronics Engineering, Korea University of Technology & Education, 600, Chungjeol-ro, Byeongcheon-myeon, Dongnam-gu, Cheonan-si 31253, Republic of Korea.
Nano-Convergence Manufacturing Systems Research Division, Korea Institute of Machinery & Materials, 156, Gajeongbuk-ro, Yuseong-gu, Daejeon 34103, Republic of Korea.
Polymers (Basel). 2023 Dec 20;16(1):26. doi: 10.3390/polym16010026.
Air, a widely recognized dielectric material, is employed as a dielectric layer in this study. We present a triboelectric sensor with a laser-induced graphene (LIG) electrode and an air-trapped pad using silicone rubber (SR). A very thin device with a thickness of 1 mm and an effective gap for contact-separation between the films of silicone rubber and polyimide (PI) of 0.6 mm makes the device extremely highly sensitive for very low amplitudes of pressure. The fabrication of LIG as an electrode material on the surface of PI is the key reason for the fabrication of the thin sensor. In this study, we showed that the fabricated air-trapped padded sensor (ATPS) has the capability to generate an output voltage of ~32 V, a short-circuit current of 1.2 µA, and attain a maximum power density of 139.8 mW m. The performance of the ATPS was compared with a replicated device having a hole on the pad, allowing air to pass through during contact-separation. The observed degradation in the electrical output suggests that the trapped air in the pad plays a crucial role in enhancing the output voltage. Therefore, the ATPS emerges as an ultra-sensitive sensor for healthcare sensing applications.
空气是一种广为人知的介电材料，在本研究中用作介电层。我们展示了一种摩擦电传感器，它具有激光诱导石墨烯（LIG）电极和使用硅橡胶（SR）的空气捕获垫。该器件非常薄，厚度为1毫米，硅橡胶与聚酰亚胺（PI）薄膜之间用于接触分离的有效间隙为0.6毫米，这使得该器件对非常低的压力幅度极其敏感。在PI表面制备LIG作为电极材料是制造这种薄传感器的关键原因。在本研究中，我们表明所制备的空气捕获垫式传感器（ATPS）能够产生约32 V的输出电压、1.2 μA的短路电流，并实现139.8 mW m的最大功率密度。将ATPS的性能与在垫上有孔的复制器件进行了比较，该复制器件在接触分离过程中允许空气通过。观察到的电输出下降表明垫中捕获的空气在提高输出电压方面起着关键作用。因此，ATPS成为用于医疗传感应用的超灵敏传感器。
