Na, Hong Ryeol Lee, Hyun Joo Jeon, Jae Ho Kim, Han-Jin Jerng, Sahng-Kyoon Roy, Sanjib Baran Chun, Seung-Hyun Lee, Sunghun Yun, Yong Ju 2024-01-19T13:01:16Z 2024-01-19T13:01:16Z 2022-04-05 2022-01 2397-4621 https://pubs.kist.re.kr/handle/201004/115825 Resistive strain sensors (RSS) with ultrasensitivity have attracted much attention as multifunctional sensors. However, since most ultrasensitive RSS are designed by cracked conductive metals, the sensing performance is severely degraded due to accumulated structural deformation with consecutive cycles. To overcome such limitation, newly designed structures have been suggested, but the development of mechanosensors exhibiting superior stability and ultrasensitivity still remains a challenge. Here, we demonstrate that vertical graphene (VG) RSS with high sensitivity (gauge factor greater than 5000), remarkable durability (>10,000 cycles), and extraordinary resilience can serve multifunctional applications. We find that well-defined cracks on tufted network structure result in highly reversible resistance variation, especially revivable status even after broken current path, confirmed by microscopic in situ monitoring. The VG integrated with a wireless sensing system exhibits excellent timbre recognition performance. Our findings provide inspirable insights for mechanosensing system, making VG a promising component for future practicable flexible sensor technologies. English Nature Publishing Group Vertical graphene on flexible substrate, overcoming limits of crack-based resistive strain sensors Article 10.1038/s41528-022-00135-1 1 npj Flexible Electronics, v.6, no.1 npj Flexible Electronics 6 1 Y scie scopus 000749221000001 2-s2.0-85123577561 Engineering, Electrical & Electronic Materials Science, Multidisciplinary Engineering Materials Science Article SKIN COMPOSITES