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Direct-write fabrication of freestanding nanocomposite strain sensors

Rouhollah Dermanaki Farahani, Hamid Dalir, Vincent Le Borgne, Loick A. Gautier, My Ali El Khakani, Martin Lévesque, Daniel Therriault

Article (2012)

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Abstract

This paper deals with the design and microfabrication of two three-dimensional (3D) freestanding patterned strain sensors made of single-walled carbon nanotubes (SWCNTs) nanocomposites with the ultraviolet-assisted direct-write (UV-DW) technique. The first sensor consisted of three nanocomposite microfibers suspended between two rectangular epoxy pads. The flexibility of the UV-DW technique enables manufacturing the sensor and its housing in one monolithic structure. The second sensor was composed of a nanocomposite network consisting of four parallel microsprings, which demonstrates the high capability of the technique when compared to the conventional photolithographic technologies. The performances of the sensors were assessed under tension and compression, respectively. The sensors sensitivities were evaluated by correlating their measured resistivities to the applied displacements/strains. Electrical conductivity measurements revealed that the manufactured sensors are highly sensitive to small mechanical disturbances, especially for lower nanotube loadings when compared to traditional metallic or nanocomposite films. The present manufacturing method offers a new perspective for manufacturing highly sensitive 3D freestanding microstructured sensors.
Subjects: 1700 Design and manufacturing > 1702 Advanced manufacturing
2000 Materials science and technology > 2007 Composites
2100 Mechanical engineering > 2100 Mechanical engineering
Department: Department of Mechanical Engineering
Research Center: CREPEC - Center for Applied Research on Polymers and Composites
LM2 - Laboratory for Multi-scale Mechanics
Funders: FQRNT (Le Fonds Québécois de la Recherche sur la Nature et les Technologies), CRSNG/NSERC, Plasma-Québec (le Réseau Stratégique du FQRNT sur la Science et Technologies des Plasmas)
PolyPublie URL: https://publications.polymtl.ca/10396/
Journal Title: Nanotechnology (vol. 23, no. 8)
Publisher: IOP Publishing Ltd
DOI: 10.1088/0957-4484/23/8/085502
Official URL: https://doi.org/10.1088/0957-4484/23/8/085502
Date Deposited: 26 Jul 2022 12:01
Last Modified: 23 Nov 2022 21:05
Cite in APA 7: Farahani, R. D., Dalir, H., Le Borgne, V., Gautier, L. A., El Khakani, M. A., Lévesque, M., & Therriault, D. (2012). Direct-write fabrication of freestanding nanocomposite strain sensors. Nanotechnology, 23(8), 085502 (10 pages). https://doi.org/10.1088/0957-4484/23/8/085502

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