title: Electrochemical determination of dopamine in the presence of ascorbic acid and uric acid using the synergistic effect of gold nanoflowers and L-cysteamine monolayer at the surface of a gold electrode.
abstract: This paper describes a facile and effective method to synthesize gold nanoflowers (AuNFs) by a controllable electrodeposition method induced by a L-cysteamine (L-Cys) monolayer self-assembled on the surface of a gold electrode. The AuNFs/L-Cys/Au electrodes were characterized by field emission scanning electron microscopy (FE-SEM), cyclic voltammetry, and AC impedance spectroscopy methods. This obtained AuNFs/L-Cys/Au electrode exhibits excellent electrocatalytic activity towards the oxidation of dopamine (DA) due to the synergistic effect of AuNFs and a L-Cys monolayer. Differential pulse voltammetry (DPV) experiment results show that the oxidation peak of DA is separated from the oxidation peaks of ascorbic acid (AA) and uric acid (UA), which can be used to detect DA in the presence of AA and UA, and the results are satisfactory.
authors: Anhui Key Laboratory of Chemo-Biosensing, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, PR China. yongli@mail.ahnu.edu.cn
authors: Yongxin
authors: Y
authors: Li
authors: Qiufang
authors: Q
authors: Lu
authors: Aibin
authors: A
authors: Shi
authors: Yuanli
authors: Y
authors: Chen
authors: Shengnan
authors: S
authors: Wu
authors: Lun
authors: L
authors: Wang
mesh_terms: D001205:Ascorbic Acid / Q000737:chemistry*; D003543:Cysteamine / Q000737:chemistry*; D004298:Dopamine / Q000032:analysis*; D055664:Electrochemical Techniques / Q000295:instrumentation / Q000379:methods*; D004566:Electrodes; D006046:Gold / Q000737:chemistry*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D053768:Metal Nanoparticles / Q000737:chemistry; D008855:Microscopy, Electron, Scanning / Q000379:methods; D010084:Oxidation-Reduction; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014527:Uric Acid / Q000737:chemistry*
chemical_list: D014527:Uric Acid; D003543:Cysteamine; D006046:Gold; D001205:Ascorbic Acid; D004298:Dopamine