, Volume 25, Issue 6, pp 2823–2833 | Cite as

Fabrication of PEI-Fc/SGO multilayer films modified electrode through LBL assembly technique for the detection of dopamine

  • Ning Li
  • Lifei Zheng
  • Fangling Liao
  • Haitao ZhengEmail author
  • Shin-ichiro Suye
Original Paper


In this work, a sensor for the detection of dopamine (DA) based on electroactive polymer (PEI-Fc)/sulfonic acid-functionalized graphene oxide (SGO) multilayer film-modified glassy carbon electrode (GCE) through layer-by-layer (LBL) method was fabricated. Attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy revealed the successful functionalization of GO into SGO with negatively charged sulfonic groups. The obtained PEI-Fc/SGO multilayer films were characterized using scanning electron microscopy (SEM) and ultravioletvisible spectrometer (UV-Vis). Cyclic voltammetric studies demonstrated that the modified electrode presented enhanced electrocatalytic performance towards DA in terms of peak currents compared with bare GCE. The choronoamperometric results indicated that the modified electrode exhibited a wide linear range from 1 to 695 μM with a low detection limit of 0.255 μM towards the detection of DA. Besides, the modified electrode exhibited good selectivity, excellent reproducibility, and high stability of at least 1 month.


PEI-Fc SGO LBL assembly Choronoamperometry Dopamine 



The research was supported by the Scientific Research Foundation for the Returned Overseas Chinese Scholars (ROCS), Ministry of Education, People’s Republic China.

Compliance with ethical standards

This article does not contain any studies with human participants or animals performed by any of the authors.

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Ning Li
    • 1
  • Lifei Zheng
    • 1
  • Fangling Liao
    • 1
  • Haitao Zheng
    • 1
    Email author
  • Shin-ichiro Suye
    • 2
  1. 1.School of Environmental and Chemical EngineeringTianjin Polytechnic UniversityTianjinChina
  2. 2.Department of Applied Chemistry and Biotechnology, Graduate School of EngineeringUniversity of FukuiFukuiJapan

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