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Ammonia gas sensors based on chemically reduced graphene oxide sheets self-assembled on Au electrodes

We present a useful ammonia gas sensor based on chemically reduced graphene oxide (rGO) sheets by self-assembly technique to create conductive networks between parallel Au electrodes. Negative graphene oxide (GO) sheets with large sizes (>10 μm) can be easily electrostatically attracted onto posi...

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Detalles Bibliográficos
Autores principales: Wang, Yanyan, Zhang, Liling, Hu, Nantao, Wang, Ying, Zhang, Yafei, Zhou, Zhihua, Liu, Yanhua, Shen, Su, Peng, Changsi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4032586/
https://www.ncbi.nlm.nih.gov/pubmed/24917701
http://dx.doi.org/10.1186/1556-276X-9-251
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author Wang, Yanyan
Zhang, Liling
Hu, Nantao
Wang, Ying
Zhang, Yafei
Zhou, Zhihua
Liu, Yanhua
Shen, Su
Peng, Changsi
author_facet Wang, Yanyan
Zhang, Liling
Hu, Nantao
Wang, Ying
Zhang, Yafei
Zhou, Zhihua
Liu, Yanhua
Shen, Su
Peng, Changsi
author_sort Wang, Yanyan
collection PubMed
description We present a useful ammonia gas sensor based on chemically reduced graphene oxide (rGO) sheets by self-assembly technique to create conductive networks between parallel Au electrodes. Negative graphene oxide (GO) sheets with large sizes (>10 μm) can be easily electrostatically attracted onto positive Au electrodes modified with cysteamine hydrochloride in aqueous solution. The assembled GO sheets on Au electrodes can be directly reduced into rGO sheets by hydrazine or pyrrole vapor and consequently provide the sensing devices based on self-assembled rGO sheets. Preliminary results, which have been presented on the detection of ammonia (NH(3)) gas using this facile and scalable fabrication method for practical devices, suggest that pyrrole-vapor-reduced rGO exhibits much better (more than 2.7 times with the concentration of NH(3) at 50 ppm) response to NH(3) than that of rGO reduced from hydrazine vapor. Furthermore, this novel gas sensor based on rGO reduced from pyrrole shows excellent responsive repeatability to NH(3). Overall, the facile electrostatic self-assembly technique in aqueous solution facilitates device fabrication, the resultant self-assembled rGO-based sensing devices, with miniature, low-cost portable characteristics and outstanding sensing performances, which can ensure potential application in gas sensing fields.
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spelling pubmed-40325862014-06-10 Ammonia gas sensors based on chemically reduced graphene oxide sheets self-assembled on Au electrodes Wang, Yanyan Zhang, Liling Hu, Nantao Wang, Ying Zhang, Yafei Zhou, Zhihua Liu, Yanhua Shen, Su Peng, Changsi Nanoscale Res Lett Nano Express We present a useful ammonia gas sensor based on chemically reduced graphene oxide (rGO) sheets by self-assembly technique to create conductive networks between parallel Au electrodes. Negative graphene oxide (GO) sheets with large sizes (>10 μm) can be easily electrostatically attracted onto positive Au electrodes modified with cysteamine hydrochloride in aqueous solution. The assembled GO sheets on Au electrodes can be directly reduced into rGO sheets by hydrazine or pyrrole vapor and consequently provide the sensing devices based on self-assembled rGO sheets. Preliminary results, which have been presented on the detection of ammonia (NH(3)) gas using this facile and scalable fabrication method for practical devices, suggest that pyrrole-vapor-reduced rGO exhibits much better (more than 2.7 times with the concentration of NH(3) at 50 ppm) response to NH(3) than that of rGO reduced from hydrazine vapor. Furthermore, this novel gas sensor based on rGO reduced from pyrrole shows excellent responsive repeatability to NH(3). Overall, the facile electrostatic self-assembly technique in aqueous solution facilitates device fabrication, the resultant self-assembled rGO-based sensing devices, with miniature, low-cost portable characteristics and outstanding sensing performances, which can ensure potential application in gas sensing fields. Springer 2014-05-21 /pmc/articles/PMC4032586/ /pubmed/24917701 http://dx.doi.org/10.1186/1556-276X-9-251 Text en Copyright © 2014 Wang et al.; licensee Springer. http://creativecommons.org/licenses/by/4.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.
spellingShingle Nano Express
Wang, Yanyan
Zhang, Liling
Hu, Nantao
Wang, Ying
Zhang, Yafei
Zhou, Zhihua
Liu, Yanhua
Shen, Su
Peng, Changsi
Ammonia gas sensors based on chemically reduced graphene oxide sheets self-assembled on Au electrodes
title Ammonia gas sensors based on chemically reduced graphene oxide sheets self-assembled on Au electrodes
title_full Ammonia gas sensors based on chemically reduced graphene oxide sheets self-assembled on Au electrodes
title_fullStr Ammonia gas sensors based on chemically reduced graphene oxide sheets self-assembled on Au electrodes
title_full_unstemmed Ammonia gas sensors based on chemically reduced graphene oxide sheets self-assembled on Au electrodes
title_short Ammonia gas sensors based on chemically reduced graphene oxide sheets self-assembled on Au electrodes
title_sort ammonia gas sensors based on chemically reduced graphene oxide sheets self-assembled on au electrodes
topic Nano Express
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4032586/
https://www.ncbi.nlm.nih.gov/pubmed/24917701
http://dx.doi.org/10.1186/1556-276X-9-251
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