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Lei Wang, Xiaoyun Qin, Dr. Sen Liu, Yonglan Luo, Abdullah M. Asiri, Abdulrahman O. Al-Youbi and Prof. Xuping Sun Single-Stranded DNA-Mediated Immobilization of Graphene on a Gold Electrode for Sensitive and Selective Determination of Dopamine ChemPlusChem 77

Version of Record online: 16 DEC 2011 | DOI: 10.1002/cplu.201100009

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Chemically modified electrodes: The fast and effective immobilization of graphene on a Au electrode has been demonstrated by exploiting Au–S interactions between Au and a thiolated single-stranded DNA as well as π–π stacking interactions between graphene and DNA bases (see figure). The resultant modified electrode exhibits high sensitivity and selectivity in dopamine detection with a detection limit of 0.8 nM in the presence of ascorbic acid.

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