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A semi-permanent and durable nanoscale-crack-based sensor by on-demand healing

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Abstract

Although sensitivity and durability are desirable in a sensor, both of them cannot be easily achieved. Site-specific 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.

Graphical abstract: A semi-permanent and durable nanoscale-crack-based sensor by on-demand healing

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Publication details

The article was received on 16 Oct 2017, accepted on 21 Jan 2018 and first published on 26 Jan 2018


Article type: Paper
DOI: 10.1039/C7NR07696G
Citation: Nanoscale, 2018, Advance Article
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    A semi-permanent and durable nanoscale-crack-based sensor by on-demand healing

    B. Park, S. Lee, H. Choi, J. U. Kim, H. Hong, C. Jeong, D. Kang and T. Kim, Nanoscale, 2018, Advance Article , DOI: 10.1039/C7NR07696G

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