College of Chemistry and Materials Science, Anhui Key Laboratory of Chemo-Biosensing, Anhui Normal University, Wuhu, PR China.
Bioelectrochemistry. 2010 Aug;79(1):84-9. doi: 10.1016/j.bioelechem.2009.12.003. Epub 2009 Dec 11.
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 microM, signal/noise=3) and wide linear range (0.4 microM-6.3mM).The mechanism for the electrochemical oxidation of L-cysteine on the nano-Pt/POAP/GCE was also investigated.
铂纳米粒子（nano-Pt）和聚邻氨基酚（POAP）被制备到玻碳电极（GCE）上，形成 nano-Pt/POAP/GCE，用于电化学测定 L-半胱氨酸。POAP 膜通过 GCE 上邻氨基酚的电化学聚合获得。nano-Pt 通过电化学沉积到活化的 POAP/GCE 表面。所得的 nano-Pt/POAP/GCE 通过扫描电子显微镜（SEM）、电化学阻抗谱（EIS）和循环伏安法（CV）进行了表征，并在 Britton-Robinson（BR）缓冲溶液（pH=3.0）中在低氧化电位下对 L-半胱氨酸表现出优异的电化学响应，具有良好的稳定性和灵敏度，检测限低（0.08 microM，信噪比=3），线性范围宽（0.4 microM-6.3mM）。还研究了 nano-Pt/POAP/GCE 上 L-半胱氨酸电化学氧化的机理。
