A Sensor for Dopamine Based on Gold Nanoparticles/Poly(p-aminobenzene sulfonic acid) Modified Glassy Carbon Electrode

作者：Fang, Ying; Liu, Yunchun; Shen, Dongdong; Li, Peng; Yang, Zhousheng^*

来源：Nanoscience and Nanotechnology Letters, 2015, 7(6): 462-468.

DOI：10.1166/nnl.2015.1986

• Dopamine
• p-Aminobenzene Sulfonic Acid
• Gold Nanoparticles
• Glass Carbon Electrode

This work described a simple, controllable and green sensor for detection of dopamine (DA) by electropolynnerization of p-aminobenzene sulfonic acid (p-ABSA) onto a glass carbon electrode (GCE) which modified with gold nanoparticles (AuNPs). The gold nanoparticles were deposited on the surface of the GCE by electrodeposition, and poly(p-aminobenzene sulfonic acid) film attached onto the gold nanoparticles by electropolymerization, forming an p-ABSA/AuNPs nanocomposite film-modified GCE (p-ABSA/AuNPs/GCE). It was found that this (p-ABSA/AuNPs/GCE) modified electrode showed good electrocatalytic activity toward dopamine (DA) and good specificity for the detection of DA without interference from ascorbic acid or uric acid. Differential pulse voltammetry was used for the electrochemical DA detection. The method of cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM) were used to characterize modified electrodes. Under optimum conditions, the response peak current for the electrochemical sensor exhibited linear over the ranges of 0.1 to 100 mu M (r = 0.9991), with a detection limit of 3.5 x 10(-8) M (SIN = 3). The proposed method exhibits high sensitivity, good recovery and excellent reproducibility.

• 出版日期2015-6
• 单位安徽师范大学