Graphene/SnO2 nanocomposite-modified electrode for electrochemical detection of dopamine

R. Nurzulaikha; H.N. Lim; I. Harrison; S.S. Lim; A. Pandikumar; N.M. Huang; S.P. Lim; G.S.H. Thien; N. Yusoff; I. Ibrahim

Sensing and Bio-Sensing Research (Sep 2015)

Graphene/SnO2 nanocomposite-modified electrode for electrochemical detection of dopamine

R. Nurzulaikha,
H.N. Lim,
I. Harrison,
S.S. Lim,
A. Pandikumar,
N.M. Huang,
S.P. Lim,
G.S.H. Thien,
N. Yusoff,
I. Ibrahim

Affiliations

R. Nurzulaikha: School of Chemical and Environmental Engineering, Faculty of Engineering, The University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor, Malaysia
H.N. Lim: Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43600 Serdang, Selangor, Malaysia; Functional Device Laboratory, Institute of Advanced Technology, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia; Corresponding authors at: Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43600 Serdang, Selangor, Malaysia (H.N. Lim), Low Dimensional Materials Research Centre, Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia (A. Pandikumar).
I. Harrison: School of Chemical and Environmental Engineering, Faculty of Engineering, The University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor, Malaysia
S.S. Lim: School of Chemical and Environmental Engineering, Faculty of Engineering, The University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor, Malaysia
A. Pandikumar: Low Dimensional Materials Research Centre, Physics Department, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia; Corresponding authors at: Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43600 Serdang, Selangor, Malaysia (H.N. Lim), Low Dimensional Materials Research Centre, Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia (A. Pandikumar).
N.M. Huang: Low Dimensional Materials Research Centre, Physics Department, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
S.P. Lim: Low Dimensional Materials Research Centre, Physics Department, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
G.S.H. Thien: Low Dimensional Materials Research Centre, Physics Department, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
N. Yusoff: Low Dimensional Materials Research Centre, Physics Department, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
I. Ibrahim: Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43600 Serdang, Selangor, Malaysia

Journal volume & issue: Vol. 5
pp. 42 – 49

Abstract

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A graphene-tin oxide (G-SnO2) nanocomposite was prepared via a facile hydrothermal route using graphene oxide and Sn precursor solution without addition of any surfactant. The hydrothermally synthesized G-SnO2 nanocomposite was characterized using a field emission scanning electron microscope (FESEM), high resolution transmission electron microscope (HRTEM), X-ray diffraction (XRD), and energy dispersive spectroscopy (EDS). A homogeneous deposition of SnO2 nanoparticles with an average particle size of 10 nm on the graphene was observed in the FESEM and HRTEM images. The G-SnO2 nanocomposite was used to fabricate a modified electrode for the electrochemical detection of dopamine (DA) in the presence of ascorbic acid (AA). Differential pulse voltammetry (DPV) showed a limit of detection (LoD) of 1 μM (S/N = 3) in the presence of ascorbic acid (AA). Keywords: Graphene, Tin oxide, Nanocomposite, Electrochemical sensor, Biosensor, Dopamine

Published in Sensing and Bio-Sensing Research

ISSN: 2214-1804 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Engineering (General). Civil engineering (General)
Website: http://www.journals.elsevier.com/sensing-and-bio-sensing-research/

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