Abstract

We study the electrochemistry of single layer graphene edges using a nanopore-based structure consisting of stacked graphene and Al2O 3 dielectric layers. Nanopores, with diameters ranging from 5 to 20 nm, are formed by an electron beam sculpting process on the stacked layers. This leads to a unique edge structure which, along with the atomically thin nature of the embedded graphene electrode, demonstrates electrochemical current densities as high as 1.2 × 104 A/cm2. The graphene edge embedded structure offers a unique capability to study the electrochemical exchange at an individual graphene edge, isolated from the basal plane electrochemical activity. We also report ionic current modulation in the nanopore by biasing the embedded graphene terminal with respect to the electrodes in the fluid. The high electrochemical specific current density for a graphene nanopore-based device can have many applications in sensitive chemical and biological sensing, and energy storage devices.

Original languageEnglish (US)
Pages (from-to)834-843
Number of pages10
JournalACS Nano
Volume7
Issue number1
DOIs
StatePublished - Jan 22 2013

Fingerprint

Nanopores
Graphite
Electrochemistry
electrochemistry
Graphene
graphene
Current density
Electrochemical electrodes
current density
electrodes
energy storage
Energy storage
Electron beams
Modulation
electron beams
modulation
Electrodes
Fluids
fluids

Keywords

  • graphene
  • graphene electrochemistry
  • nanobio sensors
  • Nanopores
  • stacked graphene

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Banerjee, S., Shim, J., Rivera, J., Jin, X., Estrada, D., Solovyeva, V., ... Bashir, R. (2013). Electrochemistry at the edge of a single graphene layer in a nanopore. ACS Nano, 7(1), 834-843. https://doi.org/10.1021/nn305400n

Electrochemistry at the edge of a single graphene layer in a nanopore. / Banerjee, Shouvik; Shim, Jiwook; Rivera, Jose; Jin, Xiaozhong; Estrada, David; Solovyeva, Vita; You, Xueqiu; Pak, James; Pop, Eric; Aluru, Narayana; Bashir, Rashid.

In: ACS Nano, Vol. 7, No. 1, 22.01.2013, p. 834-843.

Research output: Contribution to journalArticle

Banerjee, S, Shim, J, Rivera, J, Jin, X, Estrada, D, Solovyeva, V, You, X, Pak, J, Pop, E, Aluru, N & Bashir, R 2013, 'Electrochemistry at the edge of a single graphene layer in a nanopore', ACS Nano, vol. 7, no. 1, pp. 834-843. https://doi.org/10.1021/nn305400n
Banerjee S, Shim J, Rivera J, Jin X, Estrada D, Solovyeva V et al. Electrochemistry at the edge of a single graphene layer in a nanopore. ACS Nano. 2013 Jan 22;7(1):834-843. https://doi.org/10.1021/nn305400n
Banerjee, Shouvik ; Shim, Jiwook ; Rivera, Jose ; Jin, Xiaozhong ; Estrada, David ; Solovyeva, Vita ; You, Xueqiu ; Pak, James ; Pop, Eric ; Aluru, Narayana ; Bashir, Rashid. / Electrochemistry at the edge of a single graphene layer in a nanopore. In: ACS Nano. 2013 ; Vol. 7, No. 1. pp. 834-843.
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