4.6 Article

Macroporous flower-like graphene-nanosheet clusters used for electrochemical determination of dopamine

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ELSEVIER
DOI: 10.1016/j.colsurfa.2014.02.028

关键词

Graphene; Dopamine; Electrochemical fabrication; Sensor

资金

  1. National Natural Science Foundation of China [51073114, 20933007, 51373111]
  2. Suzhou Nano-project [ZXG2012022]
  3. Opening Project of Xinjiang Key Laboratory of Electronic Information Materials and Devices [XJYS0901-2010-01]
  4. Academic Award for Young Graduate Scholar of Soochow University
  5. Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)

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Well-defined flower-like graphene-nanosheet clusters (f-RGO) have been facilely and cost-effectively fabricated by electrochemical method on the surface of a glassy carbon electrode (GCE). The obtained f-RGO was directly used for the detection of dopamine (DA) via cyclic voltammetry (CV) and differential pulse voltammetry (DPV) technique. The structure of f-RGO was confirmed by scanning electron microscopy (SEM). It is observed that the f-RGO exhibits typical flower-like interconnected macroporous architecture, which contributes much to the high performance toward DA detection as compared with that of the layer-stacking RGO. For f-RGO, DPV measurement gives a wide liner range from 5 mu M to 70 mu M and 100 mu M to 600 mu M, respectively, and a good detection limit of 3 mu M (S/N = 3) for the determination of DA. Moreover, the determination of DA with f-RGO is highly selective and reproducible, with a relative standard deviation of 3.0%. (C) 2014 Elsevier B.V. All rights reserved.

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