TY - JOUR
T1 - The facile and simple synthesis of poly(3,4ethylenedioxythiophene) anchored reduced graphene oxide nanocomposite for biochemical analysis
AU - Dinesh, Bose
AU - Vilian, A. T.Ezhil
AU - Kwak, Cheol Hwan
AU - Huh, Yun Suk
AU - Saraswathi, Ramiah
AU - Han, Young Kyu
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/10/24
Y1 - 2019/10/24
N2 - In this article, we demonstrate the potentiostatic electrodeposition of poly(3,4-ethylenedioxythiophene) (PEDOT) on reduced graphene oxide (RGO) to develop a nanocomposite-modified electrode that separates three coexisting biofluids – ascorbic acid (AA), dopamine (DA), and uric acid (UA) – in a 0.1 M Phosphate buffer solution at a physiological pH (7.4). The texture, physicochemical properties, and electrochemical behavior of the PEDOT-RGO were explored using UV–visible spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, electron microscopic techniques, and electrochemical impedance spectroscopy (EIS). A PEDOT-RGO/GCE was evaluated with respect to a bare GCE, RGO/GCE, and PEDOT/GCE for the simultaneous sensing of AA, DA, and UA. The difference in voltammetric peak potentials was about 180 mV between AA and DA and 120 mV between DA and UA. The differential pulse voltammetric sensor provided a linear calibration for a wide concentration range (0.1–907 μM for AA, 0.1–901 μM for DA, and 0.1–701 μM for UA) with detection limits of 1.5 μM, 0.6 μM, and 0.2 μM for AA, DA, and UA, respectively. The developed sensor was validated by the detection of AA, DA, and UA in a vitamin C tablet, a dopamine hydrochloride injection, and human serum samples.
AB - In this article, we demonstrate the potentiostatic electrodeposition of poly(3,4-ethylenedioxythiophene) (PEDOT) on reduced graphene oxide (RGO) to develop a nanocomposite-modified electrode that separates three coexisting biofluids – ascorbic acid (AA), dopamine (DA), and uric acid (UA) – in a 0.1 M Phosphate buffer solution at a physiological pH (7.4). The texture, physicochemical properties, and electrochemical behavior of the PEDOT-RGO were explored using UV–visible spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, electron microscopic techniques, and electrochemical impedance spectroscopy (EIS). A PEDOT-RGO/GCE was evaluated with respect to a bare GCE, RGO/GCE, and PEDOT/GCE for the simultaneous sensing of AA, DA, and UA. The difference in voltammetric peak potentials was about 180 mV between AA and DA and 120 mV between DA and UA. The differential pulse voltammetric sensor provided a linear calibration for a wide concentration range (0.1–907 μM for AA, 0.1–901 μM for DA, and 0.1–701 μM for UA) with detection limits of 1.5 μM, 0.6 μM, and 0.2 μM for AA, DA, and UA, respectively. The developed sensor was validated by the detection of AA, DA, and UA in a vitamin C tablet, a dopamine hydrochloride injection, and human serum samples.
KW - Ascorbic acid
KW - Dopamine
KW - PEDOT
KW - Reduced graphene oxide
KW - Simultaneous determination
KW - Uric acid
UR - http://www.scopus.com/inward/record.url?scp=85066259833&partnerID=8YFLogxK
U2 - 10.1016/j.aca.2019.05.053
DO - 10.1016/j.aca.2019.05.053
M3 - Article
C2 - 31307704
AN - SCOPUS:85066259833
SN - 0003-2670
VL - 1077
SP - 150
EP - 159
JO - Analytica Chimica Acta
JF - Analytica Chimica Acta
ER -