Citation: FENG Xiao-Miao, YAN Zhen-Zhen. Graphene-Au Nanocomposite: Hydrothermal Synthesis and Application to Biosensor[J]. Chinese Journal of Inorganic Chemistry, ;2013, 29(5): 1051-1056. doi: 10.3969/j.issn.1001-4861.2013.00.133 shu

Graphene-Au Nanocomposite: Hydrothermal Synthesis and Application to Biosensor

FENG Xiao-Miao ^, ,
YAN Zhen-Zhen

1.
Key Laboratory for Organic Electronics & Information Displays, Institute of Advanced Materials and School of Materials Science & Engineering, Nanjing University of Posts & Telecommunications, Nanjing 210046, China

Corresponding author: FENG Xiao-Miao,
Received Date: 22 September 2012
Available Online: 31 December 2012
Fund Project: 国家自然科学基金(No.20905038,20903057,21005040) (No.20905038,20903057,21005040)“973”项目(No.2009CB930600,2012CB933301)资助项目。 (No.2009CB930600,2012CB933301)

The graphene-Au nanocomposites were synthesized through hydrothermal route. Transmission electron microscopy (TEM) images gave direct evidence of the thin and transparent sheet structure of graphene. X-ray photoelectron spectroscopic (XPS) and X-ray diffraction (XRD) results also showed the presence of Au and the reduction of graphene oxide. As a model, myoglobin (Mb) was entrapped onto the nanocomposite modified glassy carbon electrode (GCE) and applied to construct a sensor. The immobilized Mb showed a pair of well-defined redox peaks and high catalytic activity for the reduction of H₂O₂. The biosensor with a linear range from 0.1 to 1.5 μmol·L^-1 and a detection limit of 0.05 μmol·L^-1 (S/N=3) showed good selectivity, reproducibility and stability. The graphene-Au nanocomposites provide a novel matrix for protein immobilization and the construction of biosensors via the direct electron transfer of protein.
- graphene;gold;nanocomposite;biosensor
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