Journal
NANOSCALE
Volume 10, Issue 9, Pages 4354-4360Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7nr07696g
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Funding
- Basic Science Research Program through the National Research Foundation of Korea - Ministry of Science, ICT and Future Planning [NRF-2017R1D1A1B03033089, 2016R1C1B1009689]
- Basic Science Research Program through a National Research Foundation of Korea - Korean Government (MEST) [NRF-2017R1A5A1070259]
- Ajou University research fund
- Nature-Inspired Innovative Technology Development Program through the National Research Foundation of Korea (NRF)
- Ministry of Science and ICT [NRF-2017M3C1B7014222]
- National Research Foundation of Korea [2017R1D1A1B03033089, 2016H1A2A1907972] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Although sensitivity and durability are desirable in a sensor, both of them cannot be easily achieved. Sitespecific and effective signal acquisition on the limited area of a sensor inevitably allows fatigue accumulation and contamination. For example, an ultrasensitive nanoscale-crack-based sensor for detecting a mechanical stimulus with tremendous sensitivity (a gauge factor greater than 2000 under 2% strain), yet limited durability (up to a few thousand stretching cycles in tensile tests) has been presented previously. Herein, we suggest a simple yet robust nanoscale-crack-based sensor that achieves remarkable durability through the use of a self-healable polymer. The self-healable polymer helps the crack gap recover and maintain high stability for 1 million cycles under 2% strain. Moreover, site-specific recovery with infrared light irradiation was demonstrated with monolithic arrayed sensors. The proposed strategy provides a unique solution to achieving highly enhanced durability and high mechanosensitivity, which are typically incompatible.
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