Application of graphene-modified electrode for selective detection of dopamine

作者：Wang Ying; Li Yueming; Tang Longhua; Lu Jin; Li Jinghong^*

来源：Electrochemistry Communications, 2009, 11(4): 889-892.

DOI：10.1016/j.elecom.2009.02.013

• Graphene
• Dopamine
• Chitosan
• Selective detection
• Bioelectrochemisty

Graphene was synthesized chemically by Hummers and Offeman method and the graphene-modified electrode was applied in selective determination of dopamine with a linear range from 5 mu M to 200 mu M in a large excess of ascorbic acid. Selective detection was realized in completely eliminating ascorbic acid, different from the methods based on the potential separations. pi-pi stacking interaction between dopamine and graphene surface may accelerate the electron transfer whereas weaken the ascorbic acid oxidation on this graphene-modified electrode. The resulted graphene-modified electrode also showed a better performance than multi-walled carbon nanotubes-modified electrode. The phenomena were considered from the elusive two-dimensional structure and unique electronic properties of graphene.

• 出版日期2009-4
• 单位清华大学