Biomimetic Ultraflexible Piezoresistive Flow Sensor Based on Graphene Nanosheets and PVA Hydrogel

Abolpour Moshizi, S; Moradi, H; Wu, S; Han, ZJ; Razmjou, A; Asadnia, M

Biomimetic Ultraflexible Piezoresistive Flow Sensor Based on Graphene Nanosheets and PVA Hydrogel

Abolpour Moshizi, S Moradi, H Wu, S Han, ZJ Razmjou, A Asadnia, M

Permalink

Publisher:: WILEY
Publication Type:: Journal Article
Citation:: Advanced Materials Technologies, 2022, 7, (1)
Issue Date:: 2022-01-01

Closed Access

	Filename	Description	Size
	Adv Materials Technologies - 2021 - Abolpour Moshizi - Biomimetic Ultraflexible Piezoresistive Flow Sensor Based on.pdf		6.66 MB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Closed Access

This item is closed access and not available.

Full metadata record

Field	Value	Language
dc.contributor.author	Abolpour Moshizi, S
dc.contributor.author	Moradi, H
dc.contributor.author	Wu, S
dc.contributor.author	Han, ZJ
dc.contributor.author	Razmjou, A
dc.contributor.author	Asadnia, M
dc.date.accessioned	2023-03-30T04:46:04Z
dc.date.available	2023-03-30T04:46:04Z
dc.date.issued	2022-01-01
dc.identifier.citation	Advanced Materials Technologies, 2022, 7, (1)
dc.identifier.issn	2365-709X
dc.identifier.issn	2365-709X
dc.identifier.uri	http://hdl.handle.net/10453/168837
dc.description.abstract	Flow sensors play a critical role in monitoring flow parameters, including rate, velocity, direction, and rotation frequency. In this paper, inspired by biological hair cells in the human vestibular system, an innovative flow sensor is developed based on polyvinyl alcohol (PVA) hydrogel nanocomposites with a maze-like network of vertically grown graphene nanosheets (VGNs). The VGNs/PVA hydrogel absorbs a copious amount of water when immersed in water, making the sensor highly sensitive to tiny stimuli underwater. The sensor demonstrates a high sensitivity (5.755 mV (mm s−1)−1) and extremely low velocity detection (0.022 mm s−1). It also reveals outstanding performance in detecting low-frequency oscillatory flows down to 0.1 Hz, which make it suitable for many biomedical applications. As one of the potential applications of the sensor, it exhibits excellent performance in mimicking various physiological conditions of vestibular hair cells. To explain the experimental results, a complete finite element simulation is developed to model the piezoresistive effect of VGNs/PVA thin film structure. This is the first attempt to develop hydrogel–graphene nanosheet-based flow sensors, which creates the closest artificial sensor to vestibular hair cells. This miniaturized hair cell sensor paves the way for utilizing hydrogels to develop next-generation of ultrasensitive flow sensors for biomedical applications.
dc.language	English
dc.publisher	WILEY
dc.relation.ispartof	Advanced Materials Technologies
dc.relation.isbasedon	10.1002/admt.202100783
dc.rights	info:eu-repo/semantics/closedAccess
dc.title	Biomimetic Ultraflexible Piezoresistive Flow Sensor Based on Graphene Nanosheets and PVA Hydrogel
dc.type	Journal Article
utslib.citation.volume	7
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2023-03-30T04:45:59Z
pubs.issue	1
pubs.publication-status	Published
pubs.volume	7
utslib.citation.issue	1

Abstract:

Flow sensors play a critical role in monitoring flow parameters, including rate, velocity, direction, and rotation frequency. In this paper, inspired by biological hair cells in the human vestibular system, an innovative flow sensor is developed based on polyvinyl alcohol (PVA) hydrogel nanocomposites with a maze-like network of vertically grown graphene nanosheets (VGNs). The VGNs/PVA hydrogel absorbs a copious amount of water when immersed in water, making the sensor highly sensitive to tiny stimuli underwater. The sensor demonstrates a high sensitivity (5.755 mV (mm s−1)−1) and extremely low velocity detection (0.022 mm s−1). It also reveals outstanding performance in detecting low-frequency oscillatory flows down to 0.1 Hz, which make it suitable for many biomedical applications. As one of the potential applications of the sensor, it exhibits excellent performance in mimicking various physiological conditions of vestibular hair cells. To explain the experimental results, a complete finite element simulation is developed to model the piezoresistive effect of VGNs/PVA thin film structure. This is the first attempt to develop hydrogel–graphene nanosheet-based flow sensors, which creates the closest artificial sensor to vestibular hair cells. This miniaturized hair cell sensor paves the way for utilizing hydrogels to develop next-generation of ultrasensitive flow sensors for biomedical applications.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/168837