A L-cysteine sensor based on Pt nanoparticles/poly(o-aminophenol) film on glassy carbon electrode

作者：Liu, Li-Ping; Yin, Zhao-Jing; Yang, Zhou-Sheng^*

来源：Bioelectrochemistry, 2010, 79(1): 84-89.

DOI：10.1016/j.bioelechem.2009.12.003

• Poly(o-aminophenol)
• Platinum nanoparticles
• L-cysteine

Platinum nanoparticles (nano-Pt) and poly(o-aminophenol) (POAP) were fabricated onto the glassy carbon electrode(GCE) to form the nano-Pt/POAP/GCE for the electrochemical determination of L-cysteine. The POAP film was obtained through electrochemical polymerization of o-aminophenol on GCE. The nano-Pt was electrochemically deposited onto the surface of the activated POAP/GCE The resultant nano-Pt/POAP/GCE was characterized by scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV), and showed excellent electrochemical response to L-cysteine at low oxidative potential in Britton-Robinson (BR) buffer solution (pH = 3.0), with good stability and sensitivity, and featured with a low detection limit (0.08 mu M, signal/noise = 3) and wide linear range (0.4 mu M-6.3 mM). The mechanism for the electrochemical oxidation of L-cysteine on the nano-Pt/POAP/GCE was also investigated.

• 出版日期2010-8
• 单位安徽师范大学