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TitleStrain sensors based on knocked down carbon nanotubes and bucky papers thin films
Author(s)Santos, Ana Raquel Ribeiro
Amorim, Luís Manuel Machado
Nunes, J. P.
Rocha, Luís Alexandre Machado
Ferreira da Silva, Alexandre
Viana, J. C.
Strain sensors
Strain monitoring
Thin polymer films
Issue dateJul-2019
CitationSantos, A., Amorim, L., Nunes, J. P., Rocha, L. A., Silva, A. F. and Viana, J. C., Strain sensors based on knocked down carbon nanotubes and bucky papers thin films, Proceedings of the 8th Annual World Congress of Advanced Materials – Japan 2019, abstract, Osaka, Japan, 22-24th July 2019.
Abstract(s)Recently, carbon nanotubes (CNTs) thin films have been widely applied in sensing applications due to their piezoresistive response. Furthermore, CNT anisotropic electric properties, due to its alignment, can provide useful information regarding strain direction. We present a comparative study between knocked down vertically aligned CNT based sensor, reported in our previous work [1], and CNT bucky papers (BP) based sensors. For this purpose, commercial multi-wall carbon nanotubes (MWCNTs) were dispersed in two different solvents, dimethylformamide (DMF) and ethanol, vacuum filtrated and dried. From these freestanding BP thin films, 10x10 mm squares were cut off and transferred to polyimide (PI) films. The relative electric resistance response and sensitivity of the strained samples was measured and compared with the knocked down CNT/PI based sensor. Moreover, the morphology of the samples was characterized by scanning electron microscopy (SEM). The results showed a high sensitivity to strain, however knocked down CNT/PI based sensor presented better mechanical performance and an anisotropic behaviour that can be used to infer strain direction.
AccessOpen access
Appears in Collections:IPC - Resumos em actas de encontros científicos internacionais com arbitragem

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