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

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Zhijuan Wang
  • Juan Zhang
  • Zongyou Yin
  • Shixin Wu
  • Daniel Mandler

Detail(s)

Original languageEnglish
Pages (from-to)2728-2733
Journal / PublicationNanoscale
Volume4
Issue number8
Online published6 Mar 2012
Publication statusPublished - 21 Apr 2012
Externally publishedYes

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 density 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 is detected with the methylene blue intercalator. Our results show that the target DNA can be detected as low as 100 fM, i.e. 0.5 amol DNA in 5 μL solution. © 2012 The Royal Society of Chemistry.

Citation Format(s)

Fabrication of nanoelectrode ensembles by electrodepositon of Au nanoparticles on single-layer graphene oxide sheets. / Wang, Zhijuan; Zhang, Juan; Yin, Zongyou; Wu, Shixin; Mandler, Daniel; Zhang, Hua.

In: Nanoscale, Vol. 4, No. 8, 21.04.2012, p. 2728-2733.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review