Design and fabrication of fatigue damage free metal electrode with 2D nanohole arrays
- Design and fabrication of fatigue damage free metal electrode with 2D nanohole arrays
- 최인석; 김병준; 주영창
- Fatigue; Cu
- Issue Date
- The Minerals, Metals and Materials Society (TMS)
- Design and fabrication of reliable electrodessubject to repeated deformation is one of the most important challenges in flexible devices since mechanical and electrical properties of metal films degrade gradually because of fatigue damage. Here, we systematically investigated the electrical resistance change of the metal film on a polymer substrate during fatigue cycle.The resistivity changes after crack nucleation could be scaled using a dimensional analysis with respect to crack nucleation cycles, which indicates that controlling the crack nucleation would be crucial against fatigue damage. To suppress crack nucleation and propagation, weintroduced a novelnanostructured fatigue damage-free copper electrode on flexible substrate by creating 2-Dnanohole arrays. The arrayed nanoholescontrol the collective dislocation slips and decrease the average strain level so that electrical conductivity of nanohole-containing electrodes surprisingly maintained even under 500,000 bending cycles whereas that of untreated conventional copper increase by three times under the same condition.
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- KIST Publication > Conference Paper
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