Enhancement of humidity sensitivity of graphene through functionalization with polyethylenimine

Enhancement of humidity sensitivity of graphene through functionalization with polyethylenimine

In this work, we show that the sensing performance of graphene based humidity sensors can be largely improved through polymer functionalization. Chemical vapor deposited graphene is functionalized with amine rich polymer, leading to electron transfer from amine groups in the polymer to graphene. The...

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Main Authors: Ben Aziza, Zeineb, Zhang, Kang, Baillargeat, Dominique, Zhang, Qing
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2015
Online Access:https://hdl.handle.net/10356/79253
http://hdl.handle.net/10220/38797
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-792532020-03-07T13:56:08Z Enhancement of humidity sensitivity of graphene through functionalization with polyethylenimine Ben Aziza, Zeineb Zhang, Kang Baillargeat, Dominique Zhang, Qing School of Electrical and Electronic Engineering In this work, we show that the sensing performance of graphene based humidity sensors can be largely improved through polymer functionalization. Chemical vapor deposited graphene is functionalized with amine rich polymer, leading to electron transfer from amine groups in the polymer to graphene. The functionalized graphene humidity sensor has demonstrated good sensitivity, recovery, and repeatability. Charge transfer between the functionalized graphene and water molecules and the sensing mechanism are studied systemically using field effect transistor geometry and scanning Kelvin probe microscopy. Published version 2015-10-13T03:13:25Z 2019-12-06T13:20:53Z 2015-10-13T03:13:25Z 2019-12-06T13:20:53Z 2015 2015 Journal Article Ben Aziza, Z., Zhang, K., Baillargeat, D., & Zhang, Q. (2015). Enhancement of humidity sensitivity of graphene through functionalization with polyethylenimine. Applied Physics Letters, 107(13), 134102-. https://hdl.handle.net/10356/79253 http://hdl.handle.net/10220/38797 10.1063/1.4932124 en Applied Physics Letters © 2015 AIP Publishing LLC. This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of AIP Publishing LLC. The published version is available at: [http://dx.doi.org/10.1063/1.4932124]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
description In this work, we show that the sensing performance of graphene based humidity sensors can be largely improved through polymer functionalization. Chemical vapor deposited graphene is functionalized with amine rich polymer, leading to electron transfer from amine groups in the polymer to graphene. The functionalized graphene humidity sensor has demonstrated good sensitivity, recovery, and repeatability. Charge transfer between the functionalized graphene and water molecules and the sensing mechanism are studied systemically using field effect transistor geometry and scanning Kelvin probe microscopy.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Ben Aziza, Zeineb
Zhang, Kang
Baillargeat, Dominique
Zhang, Qing
format Article
author Ben Aziza, Zeineb
Zhang, Kang
Baillargeat, Dominique
Zhang, Qing
spellingShingle Ben Aziza, Zeineb
Zhang, Kang
Baillargeat, Dominique
Zhang, Qing
Enhancement of humidity sensitivity of graphene through functionalization with polyethylenimine
author_sort Ben Aziza, Zeineb
title Enhancement of humidity sensitivity of graphene through functionalization with polyethylenimine
title_short Enhancement of humidity sensitivity of graphene through functionalization with polyethylenimine
title_full Enhancement of humidity sensitivity of graphene through functionalization with polyethylenimine
title_fullStr Enhancement of humidity sensitivity of graphene through functionalization with polyethylenimine
title_full_unstemmed Enhancement of humidity sensitivity of graphene through functionalization with polyethylenimine
title_sort enhancement of humidity sensitivity of graphene through functionalization with polyethylenimine
publishDate 2015
url https://hdl.handle.net/10356/79253
http://hdl.handle.net/10220/38797
_version_ 1681036512693583872

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