Fabrication of nanoelectrode ensembles by electrodeposition of Au nanoparticles on single-layer graphene oxide sheets.

Citation:

Zhijuan Wang, Zhang, Juan , Yin, Zongyou , Wu, Shixin , Mandler, Daniel , and Zhang, Hua. . 2012. “Fabrication Of Nanoelectrode Ensembles By Electrodeposition Of Au Nanoparticles On Single-Layer Graphene Oxide Sheets.”. Nanoscalenanoscale, 4, Pp. 2728 - 2733.

Abstract:

Nanoelectrode ensembles (NEEs) have been fabricated by the electrodeposition of Au nanoparticles (AuNPs) on single-layer graphene oxide (GO) sheets coated on a glassy carbon electrode (GCE). The fabricated NEEs show a typical sigmoidal shaped voltammetric profile, arising from the low coverage d. of AuNPs on GCE and large distance among them, which can be easily controlled by varying the electrodeposition time. As a proof of concept, after the probe HS-DNA is immobilized on the NEEs through the Au-S bonding, the target DNA was detected with the methylene blue intercalator. The authors’ results show that the target DNA can be detected as low as 100 fM, i.e. 0.5 amol DNA in 5 μL soln. [on SciFinder(R)]