Premium
Highly Selective and Sensitive Determination of Dopamine in the Presence of Ascorbic Acid Using a 3D Graphene Foam Electrode
Author(s) -
Huang Shuo,
Yue Hongyan,
Zhou Jin,
Zhang Jianjiao,
Zhang Chunyu,
Gao Xin,
Chang Jing
Publication year - 2014
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201300297
Subject(s) - ascorbic acid , graphene , electrode , scanning electron microscope , raman spectroscopy , materials science , chemical vapor deposition , transmission electron microscopy , detection limit , electrochemistry , analytical chemistry (journal) , chemical engineering , nanotechnology , chemistry , chromatography , composite material , optics , physics , food science , engineering
A three‐dimensional (3D), macroporous and highly conductive graphene foam (GF) was synthesized by atmospheric pressure chemical vapor deposition (CVD). The morphologies of the GF were characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The structure of the GF was investigated by X‐ray diffraction (XRD) and Raman spectroscopy. The GF prepared by CVD was then transferred onto ITO coated glass, acting as an electrode, to detect dopamine (DA) and ascorbic acid (AA) by electrochemical methods. The results show that the GF exhibits high selectivity for the detection of DA and AA. It also shows high sensitivity for detection of DA with the lower detection limits of ∼2.0 nM in the linear response up to ∼10 µM. This demonstrates the free‐standing GF provides a promising platform as a 3D biosensing material.