Ultrasensitive and ultrastretchable metal crack strain sensor based on helical polydimethylsiloxane.

ABSTRACT: The majority of crack sensors do not offer simultaneously both a significant stretchability and an ultrahigh sensitivity. In this study, we present a straightforward and cost-effective approach to fabricate metal crack sensors that exhibit exceptional performance in terms of ultrahigh sensitivity and ultrahigh stretchability. This is achieved by incorporating a helical structure into the substrate through a modeling process and, subsequently, depositing a thin film of gold onto the polydimethylsiloxane substrate via sputter deposition. The metal thin film is then pre-stretched to generate microcracks. The sensor demonstrates a remarkable stretchability of 300%, an exceptional sensitivity with a maximum gauge factor reaching 10⁷, a rapid response time of 158 ms, minimal hysteresi

SUBMITTER: Chen S 

PROVIDER: S-EPMC10910384 | biostudies-literature | 2024

REPOSITORIES: biostudies-literature