Abstract
Arrays of carbon nanostructures have gained relevance in current strain sensor technology, pursuing high sensitivity, enhanced stretchability and tunability in the temperature coefficient of resistance. The design and fabrication parameters such as the grid geometry and polymer coating of a strain gauge based on a dense array of carbon nanotubes (CNTs) comprising the grid, deposited over a polyimide (Kapton®) substrate, are investigated herein. It is found that varying the geometrical parameters of the CNT grid led to a 13% increase in the gauge factor. Polysulfone coating lowers the sensitivity compared to polyurethane coating, but increases the repeatability and linearity of the response. The fabricated gauges were characterized regarding their piezoresistive response at room and higher temperatures. A small negative temperature coefficient of resistance (−5.63 ×10−2 %/°C) was found. The fabricated gauges show repeatability and linearity when using as a strain sensor bonded to a 4-point bending coupon during 50 loading-unloading cycles.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
