Kim, Yeunhee Song, Kahye Song, Jae-Bok Cha, Youngsu 2024-01-19T19:32:06Z 2024-01-19T19:32:06Z 2021-09-02 2019-08 0964-1726 https://pubs.kist.re.kr/handle/201004/119709 Herein, we investigated the feasibility of a flexible ring type energy harvester for a cylindrical shape change similar to that in a bent human finger. We fabricated a ring type energy harvester using a piezoelectric material, polyvinylidene fluoride, on a polydimethylsiloxane substrate. We modeled a human finger using a silicone cylinder to mimic the movement of a real human finger and measured the power harvested from its shape change under compression. A series of experiments were conducted under two different conditions, namely the variations in the radius of the cylinder and input frequency. Furthermore, we experimentally and theoretically assessed the output power and analyzed the harvested power as a function of the load resistance. We observed that the maximum harvested power level is of the order of hundreds of nanowatts. English IOP PUBLISHING LTD NANOGENERATORS FABRICATION GENERATOR DESIGN Energy harvesting from flexible piezoelectric ring Article 10.1088/1361-665X/ab29a8 1 SMART MATERIALS AND STRUCTURES, v.28, no.8 SMART MATERIALS AND STRUCTURES 28 8 scie scopus 000476905000002 2-s2.0-85070927671 Instruments & Instrumentation Materials Science, Multidisciplinary Instruments & Instrumentation Materials Science Article NANOGENERATORS FABRICATION GENERATOR DESIGN energy harvesting piezoelectric material ring shape