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High-Performance Graphene-Fiber-Based Neural Recording Microelectrodes

Journal Article


Abstract


  • Fabrication of flexible and free-standing graphene-fiber- (GF-) based microelectrode arrays with a thin platinum coating, acting as a current collector, results in a structure with low impedance, high surface area, and excellent electrochemical properties. This modification results in a strong synergistic effect between these two constituents leading to a robust and superior hybrid material with better performance than either graphene electrodes or Pt electrodes. The low impedance and porous structure of the GF results in an unrivalled charge injection capacity of 10.34 mC cm −2 with the ability to record and detect neuronal activity. Furthermore, the thin Pt layer transfers the collected signals along the microelectrode efficiently. In vivo studies show that microelectrodes implanted in the rat cerebral cortex can detect neuronal activity with remarkably high signal-to-noise ratio (SNR) of 9.2 dB in an area as small as an individual neuron.

Authors


  •   Wang, Kezhong (external author)
  •   Frewin, Christopher (external author)
  •   Esrafilzadeh, Dorna (external author)
  •   Yu, Changchun (external author)
  •   Wang, Caiyun
  •   Pancrazio, Joseph (external author)
  •   Romero-Ortega, Mario I. (external author)
  •   Jalili, Rouhollah (external author)
  •   Wallace, Gordon G.

Publication Date


  • 2019

Citation


  • Wang, K., Frewin, C. L., Esrafilzadeh, D., Yu, C., Wang, C., Pancrazio, J. J., Romero-Ortega, M., Jalili, R. & Wallace, G. (2019). High-Performance Graphene-Fiber-Based Neural Recording Microelectrodes. Advanced Materials, 31 (15), 1805867-1-1805867-10.

Scopus Eid


  • 2-s2.0-85062327495

Start Page


  • 1805867-1

End Page


  • 1805867-10

Volume


  • 31

Issue


  • 15

Place Of Publication


  • Germany

Abstract


  • Fabrication of flexible and free-standing graphene-fiber- (GF-) based microelectrode arrays with a thin platinum coating, acting as a current collector, results in a structure with low impedance, high surface area, and excellent electrochemical properties. This modification results in a strong synergistic effect between these two constituents leading to a robust and superior hybrid material with better performance than either graphene electrodes or Pt electrodes. The low impedance and porous structure of the GF results in an unrivalled charge injection capacity of 10.34 mC cm −2 with the ability to record and detect neuronal activity. Furthermore, the thin Pt layer transfers the collected signals along the microelectrode efficiently. In vivo studies show that microelectrodes implanted in the rat cerebral cortex can detect neuronal activity with remarkably high signal-to-noise ratio (SNR) of 9.2 dB in an area as small as an individual neuron.

Authors


  •   Wang, Kezhong (external author)
  •   Frewin, Christopher (external author)
  •   Esrafilzadeh, Dorna (external author)
  •   Yu, Changchun (external author)
  •   Wang, Caiyun
  •   Pancrazio, Joseph (external author)
  •   Romero-Ortega, Mario I. (external author)
  •   Jalili, Rouhollah (external author)
  •   Wallace, Gordon G.

Publication Date


  • 2019

Citation


  • Wang, K., Frewin, C. L., Esrafilzadeh, D., Yu, C., Wang, C., Pancrazio, J. J., Romero-Ortega, M., Jalili, R. & Wallace, G. (2019). High-Performance Graphene-Fiber-Based Neural Recording Microelectrodes. Advanced Materials, 31 (15), 1805867-1-1805867-10.

Scopus Eid


  • 2-s2.0-85062327495

Start Page


  • 1805867-1

End Page


  • 1805867-10

Volume


  • 31

Issue


  • 15

Place Of Publication


  • Germany