Single and bundled carbon nanofibers as ultralightweight and flexible piezoresistive sensors

Abstract This work demonstrates the application of electrospun single and bundled carbon nanofibers (CNFs) as piezoresistive sensing elements in flexible and ultralightweight sensors. Material, electrical, and nanomechanical characterizations were conducted on the CNFs to understand the effect of th...

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Autores principales:	Debarun Sengupta, Ssu-Han Chen, Aron Michael, Chee Yee Kwok, Sean Lim, Yutao Pei, Ajay Giri Prakash Kottapalli
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Electronics TK7800-8360 Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/51d7dce428d8425ea132826f3f138be3
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spelling	oai:doaj.org-article:51d7dce428d8425ea132826f3f138be32021-12-02T14:58:31ZSingle and bundled carbon nanofibers as ultralightweight and flexible piezoresistive sensors10.1038/s41528-020-0072-22397-4621https://doaj.org/article/51d7dce428d8425ea132826f3f138be32020-05-01T00:00:00Zhttps://doi.org/10.1038/s41528-020-0072-2https://doaj.org/toc/2397-4621Abstract This work demonstrates the application of electrospun single and bundled carbon nanofibers (CNFs) as piezoresistive sensing elements in flexible and ultralightweight sensors. Material, electrical, and nanomechanical characterizations were conducted on the CNFs to understand the effect of the critical synthesis parameter—the pyrolyzation temperature on the morphological, structural, and electrical properties. The mechanism of conductive path change under the influence of external stress was hypothesized to explain the piezoresistive behavior observed in the CNF bundles. Quasi-static tensile strain characterization of the CNF bundle-based flexible strain sensor showed a linear response with an average gauge factor of 11.14 (for tensile strains up to 50%). Furthermore, conductive graphitic domain discontinuity model was invoked to explain the piezoresistivity originating in a single isolated electrospun CNF. Finally, a single piezoresistive CNF was utilized as a sensing element in an NEMS flow sensor to demonstrate air flow sensing in the range of 5–35 m/s.Debarun SenguptaSsu-Han ChenAron MichaelChee Yee KwokSean LimYutao PeiAjay Giri Prakash KottapalliNature PortfolioarticleElectronicsTK7800-8360Materials of engineering and construction. Mechanics of materialsTA401-492ENnpj Flexible Electronics, Vol 4, Iss 1, Pp 1-11 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Electronics TK7800-8360 Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Electronics TK7800-8360 Materials of engineering and construction. Mechanics of materials TA401-492 Debarun Sengupta Ssu-Han Chen Aron Michael Chee Yee Kwok Sean Lim Yutao Pei Ajay Giri Prakash Kottapalli Single and bundled carbon nanofibers as ultralightweight and flexible piezoresistive sensors
description	Abstract This work demonstrates the application of electrospun single and bundled carbon nanofibers (CNFs) as piezoresistive sensing elements in flexible and ultralightweight sensors. Material, electrical, and nanomechanical characterizations were conducted on the CNFs to understand the effect of the critical synthesis parameter—the pyrolyzation temperature on the morphological, structural, and electrical properties. The mechanism of conductive path change under the influence of external stress was hypothesized to explain the piezoresistive behavior observed in the CNF bundles. Quasi-static tensile strain characterization of the CNF bundle-based flexible strain sensor showed a linear response with an average gauge factor of 11.14 (for tensile strains up to 50%). Furthermore, conductive graphitic domain discontinuity model was invoked to explain the piezoresistivity originating in a single isolated electrospun CNF. Finally, a single piezoresistive CNF was utilized as a sensing element in an NEMS flow sensor to demonstrate air flow sensing in the range of 5–35 m/s.
format	article
author	Debarun Sengupta Ssu-Han Chen Aron Michael Chee Yee Kwok Sean Lim Yutao Pei Ajay Giri Prakash Kottapalli
author_facet	Debarun Sengupta Ssu-Han Chen Aron Michael Chee Yee Kwok Sean Lim Yutao Pei Ajay Giri Prakash Kottapalli
author_sort	Debarun Sengupta
title	Single and bundled carbon nanofibers as ultralightweight and flexible piezoresistive sensors
title_short	Single and bundled carbon nanofibers as ultralightweight and flexible piezoresistive sensors
title_full	Single and bundled carbon nanofibers as ultralightweight and flexible piezoresistive sensors
title_fullStr	Single and bundled carbon nanofibers as ultralightweight and flexible piezoresistive sensors
title_full_unstemmed	Single and bundled carbon nanofibers as ultralightweight and flexible piezoresistive sensors
title_sort	single and bundled carbon nanofibers as ultralightweight and flexible piezoresistive sensors
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/51d7dce428d8425ea132826f3f138be3
work_keys_str_mv	AT debarunsengupta singleandbundledcarbonnanofibersasultralightweightandflexiblepiezoresistivesensors AT ssuhanchen singleandbundledcarbonnanofibersasultralightweightandflexiblepiezoresistivesensors AT aronmichael singleandbundledcarbonnanofibersasultralightweightandflexiblepiezoresistivesensors AT cheeyeekwok singleandbundledcarbonnanofibersasultralightweightandflexiblepiezoresistivesensors AT seanlim singleandbundledcarbonnanofibersasultralightweightandflexiblepiezoresistivesensors AT yutaopei singleandbundledcarbonnanofibersasultralightweightandflexiblepiezoresistivesensors AT ajaygiriprakashkottapalli singleandbundledcarbonnanofibersasultralightweightandflexiblepiezoresistivesensors
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Single and bundled carbon nanofibers as ultralightweight and flexible piezoresistive sensors

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