Flexible Hall sensor made of laser-scribed graphene

Abstract Graphene has shown considerable potential for sensing magnetic fields based on the Hall Effect, due to its high carrier mobility, low sheet carrier density, and low-temperature dependence. However, the cost of graphene in comparison to conventional materials has meant that its uptake in ele...

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Autores principales:	By Altynay Kaidarova, Wenhao Liu, Liam Swanepoel, Abdullah Almansouri, Nathan R. Geraldi, Carlos.M. Duarte, Jurgen Kosel
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Electronics TK7800-8360 Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/480cb92550f84e5a8850455d847ef500
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spelling	oai:doaj.org-article:480cb92550f84e5a8850455d847ef5002021-12-02T13:50:55ZFlexible Hall sensor made of laser-scribed graphene10.1038/s41528-021-00100-42397-4621https://doaj.org/article/480cb92550f84e5a8850455d847ef5002021-02-01T00:00:00Zhttps://doi.org/10.1038/s41528-021-00100-4https://doaj.org/toc/2397-4621Abstract Graphene has shown considerable potential for sensing magnetic fields based on the Hall Effect, due to its high carrier mobility, low sheet carrier density, and low-temperature dependence. However, the cost of graphene in comparison to conventional materials has meant that its uptake in electronic manufacturing has been slow. To lower technological barriers and bring more widespread adoption of graphene Hall sensors, we are using a one-step laser scribing process that does not rely on multiple steps, toxic chemicals, and subsequent treatments. Laser-scribed graphene Hall sensors offer a linear response to magnetic fields with a normalized sensitivity of ~1.12 V/AT. They also exhibit a low constant noise voltage floor of ~ 50 nV/ $$\sqrt {{\mathrm{Hz}}}$$ Hz for a bias current of 100 µA at room temperature, which is comparable with state-of-the-art low-noise Hall sensors. The sensors combine a high bendability, come with high robustness and operating temperatures up to 400 °C. They enable device ideas in various areas, for instance, soft robotics. As an example, we combined a laser-scribed graphene sensor with a deformable elastomer and flexible magnet to realize low-cost, compliant, and customizable tactile sensors.By Altynay KaidarovaWenhao LiuLiam SwanepoelAbdullah AlmansouriNathan R. GeraldiCarlos.M. DuarteJurgen KoselNature PortfolioarticleElectronicsTK7800-8360Materials of engineering and construction. Mechanics of materialsTA401-492ENnpj Flexible Electronics, Vol 5, Iss 1, Pp 1-7 (2021)
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 By Altynay Kaidarova Wenhao Liu Liam Swanepoel Abdullah Almansouri Nathan R. Geraldi Carlos.M. Duarte Jurgen Kosel Flexible Hall sensor made of laser-scribed graphene
description	Abstract Graphene has shown considerable potential for sensing magnetic fields based on the Hall Effect, due to its high carrier mobility, low sheet carrier density, and low-temperature dependence. However, the cost of graphene in comparison to conventional materials has meant that its uptake in electronic manufacturing has been slow. To lower technological barriers and bring more widespread adoption of graphene Hall sensors, we are using a one-step laser scribing process that does not rely on multiple steps, toxic chemicals, and subsequent treatments. Laser-scribed graphene Hall sensors offer a linear response to magnetic fields with a normalized sensitivity of ~1.12 V/AT. They also exhibit a low constant noise voltage floor of ~ 50 nV/ $$\sqrt {{\mathrm{Hz}}}$$ Hz for a bias current of 100 µA at room temperature, which is comparable with state-of-the-art low-noise Hall sensors. The sensors combine a high bendability, come with high robustness and operating temperatures up to 400 °C. They enable device ideas in various areas, for instance, soft robotics. As an example, we combined a laser-scribed graphene sensor with a deformable elastomer and flexible magnet to realize low-cost, compliant, and customizable tactile sensors.
format	article
author	By Altynay Kaidarova Wenhao Liu Liam Swanepoel Abdullah Almansouri Nathan R. Geraldi Carlos.M. Duarte Jurgen Kosel
author_facet	By Altynay Kaidarova Wenhao Liu Liam Swanepoel Abdullah Almansouri Nathan R. Geraldi Carlos.M. Duarte Jurgen Kosel
author_sort	By Altynay Kaidarova
title	Flexible Hall sensor made of laser-scribed graphene
title_short	Flexible Hall sensor made of laser-scribed graphene
title_full	Flexible Hall sensor made of laser-scribed graphene
title_fullStr	Flexible Hall sensor made of laser-scribed graphene
title_full_unstemmed	Flexible Hall sensor made of laser-scribed graphene
title_sort	flexible hall sensor made of laser-scribed graphene
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/480cb92550f84e5a8850455d847ef500
work_keys_str_mv	AT byaltynaykaidarova flexiblehallsensormadeoflaserscribedgraphene AT wenhaoliu flexiblehallsensormadeoflaserscribedgraphene AT liamswanepoel flexiblehallsensormadeoflaserscribedgraphene AT abdullahalmansouri flexiblehallsensormadeoflaserscribedgraphene AT nathanrgeraldi flexiblehallsensormadeoflaserscribedgraphene AT carlosmduarte flexiblehallsensormadeoflaserscribedgraphene AT jurgenkosel flexiblehallsensormadeoflaserscribedgraphene
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Flexible Hall sensor made of laser-scribed graphene

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