A single-step synthesis of nitrogen-doped graphene sheets decorated with cobalt hydroxide nanoflakes for the determination of dopamine

Nitrogen-doped reduced graphene oxide (NrGO) sheets decorated with Co(OH)2 nanoflakes were prepared by a single-step hydrothermal process. The morphological and structural characterizations of as synthesized NrGO@Co(OH)2 nanoflakes were performed by field emission scanning electron microscopy (FESEM...

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Main Authors: Shahid, M.M., Ismail, A.H., Al-Mokaram, A.M.A.A.A., Vikneswaran, R., Ahmad, S., Hamza, A., Numan, A.
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Published: Taylor & Francis 2017
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Online Access:http://eprints.um.edu.my/19096/
http://dx.doi.org/10.1016/j.pnsc.2017.09.001
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Institution: Universiti Malaya
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spelling my.um.eprints.190962018-09-05T01:14:12Z http://eprints.um.edu.my/19096/ A single-step synthesis of nitrogen-doped graphene sheets decorated with cobalt hydroxide nanoflakes for the determination of dopamine Shahid, M.M. Ismail, A.H. Al-Mokaram, A.M.A.A.A. Vikneswaran, R. Ahmad, S. Hamza, A. Numan, A. Q Science (General) QC Physics QD Chemistry Nitrogen-doped reduced graphene oxide (NrGO) sheets decorated with Co(OH)2 nanoflakes were prepared by a single-step hydrothermal process. The morphological and structural characterizations of as synthesized NrGO@Co(OH)2 nanoflakes were performed by field emission scanning electron microscopy (FESEM), EDX-mapping and X-ray diffraction (XRD). NrGO@Co(OH)2 nanoflakes modified glassy carbon electrode (GCE) was used for electrochemical sensing of dopamine in neutral medium. The nanocomposite modified electrode showed enhanced electrochemical sensing ability for the detection of dopamine and the limit of detection (LoD) was found to be 0.201 μM with a sensitivity value of 0.0286 ± 0.002 mA mM−1. Interference studies revealed that NrGO@Co(OH)2─GCE endow excellent selectivity for DA detection even in the presence of higher concentration of common co-existing physiological interfering analytes. Additionally, proposed sensor demonstrated excellent performance in urine samples with promising reproducibility and stability. Taylor & Francis 2017 Article PeerReviewed Shahid, M.M. and Ismail, A.H. and Al-Mokaram, A.M.A.A.A. and Vikneswaran, R. and Ahmad, S. and Hamza, A. and Numan, A. (2017) A single-step synthesis of nitrogen-doped graphene sheets decorated with cobalt hydroxide nanoflakes for the determination of dopamine. Progress in Natural Science, 27 (5). pp. 582-587. ISSN 1002-0071 http://dx.doi.org/10.1016/j.pnsc.2017.09.001 doi:10.1016/j.pnsc.2017.09.001
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic Q Science (General)
QC Physics
QD Chemistry
spellingShingle Q Science (General)
QC Physics
QD Chemistry
Shahid, M.M.
Ismail, A.H.
Al-Mokaram, A.M.A.A.A.
Vikneswaran, R.
Ahmad, S.
Hamza, A.
Numan, A.
A single-step synthesis of nitrogen-doped graphene sheets decorated with cobalt hydroxide nanoflakes for the determination of dopamine
description Nitrogen-doped reduced graphene oxide (NrGO) sheets decorated with Co(OH)2 nanoflakes were prepared by a single-step hydrothermal process. The morphological and structural characterizations of as synthesized NrGO@Co(OH)2 nanoflakes were performed by field emission scanning electron microscopy (FESEM), EDX-mapping and X-ray diffraction (XRD). NrGO@Co(OH)2 nanoflakes modified glassy carbon electrode (GCE) was used for electrochemical sensing of dopamine in neutral medium. The nanocomposite modified electrode showed enhanced electrochemical sensing ability for the detection of dopamine and the limit of detection (LoD) was found to be 0.201 μM with a sensitivity value of 0.0286 ± 0.002 mA mM−1. Interference studies revealed that NrGO@Co(OH)2─GCE endow excellent selectivity for DA detection even in the presence of higher concentration of common co-existing physiological interfering analytes. Additionally, proposed sensor demonstrated excellent performance in urine samples with promising reproducibility and stability.
format Article
author Shahid, M.M.
Ismail, A.H.
Al-Mokaram, A.M.A.A.A.
Vikneswaran, R.
Ahmad, S.
Hamza, A.
Numan, A.
author_facet Shahid, M.M.
Ismail, A.H.
Al-Mokaram, A.M.A.A.A.
Vikneswaran, R.
Ahmad, S.
Hamza, A.
Numan, A.
author_sort Shahid, M.M.
title A single-step synthesis of nitrogen-doped graphene sheets decorated with cobalt hydroxide nanoflakes for the determination of dopamine
title_short A single-step synthesis of nitrogen-doped graphene sheets decorated with cobalt hydroxide nanoflakes for the determination of dopamine
title_full A single-step synthesis of nitrogen-doped graphene sheets decorated with cobalt hydroxide nanoflakes for the determination of dopamine
title_fullStr A single-step synthesis of nitrogen-doped graphene sheets decorated with cobalt hydroxide nanoflakes for the determination of dopamine
title_full_unstemmed A single-step synthesis of nitrogen-doped graphene sheets decorated with cobalt hydroxide nanoflakes for the determination of dopamine
title_sort single-step synthesis of nitrogen-doped graphene sheets decorated with cobalt hydroxide nanoflakes for the determination of dopamine
publisher Taylor & Francis
publishDate 2017
url http://eprints.um.edu.my/19096/
http://dx.doi.org/10.1016/j.pnsc.2017.09.001
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