A L-cysteine sensor based on Pt nanoparticles/poly(o-aminophenol) film on glassy carbon electrode.
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.
Liu
Li-Ping
LP
College of Chemistry and Materials Science, Anhui Key Laboratory of Chemo-Biosensing, Anhui Normal University, Wuhu, PR China.
Yin
Zhao-Jing
ZJ
Yang
Zhou-Sheng
ZS
D002244:Carbon / Q000737:chemistry*; D002623:Chemistry Techniques, Analytical / Q000295:instrumentation*; D003545:Cysteine / Q000032:analysis* / Q000737:chemistry; D004563:Electrochemistry; D004566:Electrodes; D005898:Glass / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D057230:Limit of Detection; D016014:Linear Models; D053768:Metal Nanoparticles / Q000737:chemistry*; D010084:Oxidation-Reduction; D010984:Platinum / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry; D013499:Surface Properties
D011108:Polymers; C505204:poly(2-aminophenol); D012967:Sodium Dodecyl Sulfate; D010984:Platinum; D002244:Carbon; D003545:Cysteine