title: Ultrasensitive, Stretchable Strain Sensors Based on Fragmented Carbon Nanotube Papers.
abstract: The development of strain sensors featuring both ultra high sensitivity and high stretchability is still a challenge. We demonstrate that strain sensors based on fragmented single-walled carbon nanotube (SWCNT) paper embedded in poly(dimethylsiloxane) (PDMS) can sustain their sensitivity even at very high strain levels (with a gauge factor of over 107at 50% strain). This record sensitivity is ascribed to the low initial electrical resistance (5-28 Ω) of the SWCNT paper and the wide change in resistance (up to 106Ω) governed by the percolated network of SWCNT in the cracked region. The sensor response remains nearly unchanged after 10 000 strain cycles at 20% proving the robustness of this technology. This fragmentation based sensing system brings opportunities to engineer highly sensitive stretchable sensors.
authors.affiliation: King Abdullah University of Science and Technology (KAUST) , Physical Sciences and Engineering Division, COHMAS Laboratory, Thuwal 23955-6900, Saudi Arabia.
authors.forename: Jian
authors.identifier: http://orcid.org/0000-0003-0144-5901
authors.initials: J
authors.lastname: Zhou
authors.affiliation: King Abdullah University of Science and Technology (KAUST) , Physical Sciences and Engineering Division, COHMAS Laboratory, Thuwal 23955-6900, Saudi Arabia.|Shanghai Jiao Tong University , School of Mechanical Engineering, State Key Laboratory of Mechanical Systems and Vibration, 800 Dongchuan Road, Minhang District, Shanghai, 200240, P.R. China.
authors.forename: Hu
authors.initials: H
authors.lastname: Yu
authors.affiliation: King Abdullah University of Science and Technology (KAUST) , Physical Sciences and Engineering Division, COHMAS Laboratory, Thuwal 23955-6900, Saudi Arabia.
authors.forename: Xuezhu
authors.initials: X
authors.lastname: Xu
authors.affiliation: King Abdullah University of Science and Technology (KAUST) , Physical Sciences and Engineering Division, COHMAS Laboratory, Thuwal 23955-6900, Saudi Arabia.
authors.forename: Fei
authors.initials: F
authors.lastname: Han
authors.affiliation: King Abdullah University of Science and Technology (KAUST) , Physical Sciences and Engineering Division, COHMAS Laboratory, Thuwal 23955-6900, Saudi Arabia.
authors.forename: Gilles
authors.identifier: http://orcid.org/0000-0002-7370-6093
authors.initials: G
authors.lastname: Lubineau
keywords: carbon nanotube; crack; resistance change; sensitivity; strain sensor