Decoration of Plasma-Reduced Graphene Oxide with Uniform Gold Nanoparticles and their Redox Reaction Performance

Khairul Anuar Wahid; M.A.S.M. Haniff; Mohd Ismahadi Syono; Ishak Abdul Azid

doi:10.4028/www.scientific.net/KEM.701.47

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Decoration of Plasma-Reduced Graphene Oxide with Uniform Gold Nanoparticles and their Redox Reaction Performance
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 701Decoration of Plasma-Reduced Graphene Oxide with...

Decoration of Plasma-Reduced Graphene Oxide with Uniform Gold Nanoparticles and their Redox Reaction Performance

Abstract:

This paper reports a method to enhance the electro-activity on screen printing carbon electrode (SPCE) for electrochemical sensor platform application. The method to forming uniform gold nanoparticles on reduced graphene oxide and SPCE (Au-Nps/rGO/SPCE) based on plasma-enhanced CVD process has been investigated. The results demonstrated that the Au-NPs with high density and uniform sizes were successfully introduced via CVD process where the average size and thickness are 15.9+10nm and 2.18+0.4nm respectively. A high I_D/I_G ratio for Au-NPs/rGO is 1.01 which 44% higher compared to GO I_D/I_G ratio was observed in the Raman spectrum suggesting more defective sites on the surface of Au NPS/rGO. The redox performance of Au-NPs/rGO/SPCE has also been measured and compared with rGO/SPCE and the results shown that rGO decorated with Au-NPs has a highest redox current. The peak currents of Au-NPs/rGO are significantly increased compared to the bare SPCE with increment from 0.05mA to 0.14mA. This result is proportional with the effective surface area for SPCE that has been decorated with Au-NPs/rGO where the effective area is increased from 0.126cm² to 0.166cm². The peak potential at 0.01V which was found to shift up to 0.4V as the scan rate increases suggested that reaction is electrochemically reversible.

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Periodical:

Key Engineering Materials (Volume 701)

Pages:

47-51

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.701.47

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Online since:

July 2016

Authors:

Khairul Anuar Wahid*, M.A.S.M. Haniff, Mohd Ismahadi Syono, Ishak Abdul Azid

Keywords:

Gold Nanoparticles, Plasma, Redox, Reduced Graphene Oxide

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