Ionic Liquid-assisted Synthesis of Polyaniline/Gold Nanocomposite and Its Biocatalytic Application
1 Australian Key Centre for Microscopy & Microanalysis, The University of Sydney, Sydney, NSW, 2006, Australia
2 School of Chemical Science and Engineering, The University of New South Wales, Sydney, NSW, 2005, Australia
3 School of Chemistry and Biotechnology, Yunnan Institute of Nantionalities, Kunming, Yunan, People’s Republic of China
4 Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Fuzhou University, Fuzhou, Fujian, 350002, China
5 Department of Chemistry, Fuzhou University, Fuzhou, Fujian, 350002, China
Nanoscale Research Letters 2008, 3:468-472 doi:10.1007/s11671-008-9182-9Published: 15 October 2008
In this report, a novel chemical synthesis of polyaniline/gold nanocomposite is explored using ionic liquid (IL) 1-Butyl-3-methylimidazolium hexafluorophosphate. The direct chemical synthesis of polyaniline/gold nanocomposite was initiated via the spontaneous oxidation of aniline by AuCl4−in IL. A nearly uniform dispersion of polyaniline/Au particles with a diameter of 450 ± 80 nm was produced by this method, which indicates that this method is more suitable for controlling particle dimensions. It was also found that the electrical conductivity of the polyaniline/gold nanocomposite was more than 100 times higher than that of the pure polyaniline nanoparticles. The polyaniline/gold nanocomposite displays superior function in the biocatalytic activation of microperoxidase-11 because of the high surface area of the assembly and the enhanced charge transport properties of the composite material. We also report the possible application of polyaniline/gold nanocomposite as a H2O2biosensor.