Palladium nanoparticles decorated on activated fullerene modified screen printed carbon electrode for enhanced electrochemical sensing of dopamine.
In the present work, an enhanced electrochemical sensor for dopamine (DA) was developed based on palladium nanoparticles decorated activated fullerene-C60 (AC60/PdNPs) composite modified screen printed carbon electrode (SPCE). The scanning electron microscopy and elemental analysis confirmed the formation of PdNPs on AC60. The fabricated AC60/PdNPs composite modified electrode exhibited an enhanced electrochemical response to DA with a lower oxidation potential than that of SPCE modified with PdNPs and C60, indicating the excellent electrooxidation behavior of the AC60/PdNPs composite modified electrode. The electrochemical studies confirmed that the electrooxidation of DA at the composite electrode is a diffusion controlled electrochemical process. The differential pulse voltammetry was employed for the determination of DA; under optimum conditions, the electrochemical oxidation signal of DA increased linearly at the AC60/PdNPs composite from 0.35 to 133.35 μM. The limit of detection was found as 0.056 μM with a sensitivity of 4.23 μA μM(-1) cm(-2). The good recovery of DA in the DA injection samples further revealed the good practicality of AC60/PdNPs modified electrode.
Electroanalysis and Bioelectrochemistry Lab, Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No. 1, Section 3, Chung-Hsiao East Road, Taipei 106, Taiwan (R.O.C).
Selvakumar
S
Palanisamy
Electroanalysis and Bioelectrochemistry Lab, Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No. 1, Section 3, Chung-Hsiao East Road, Taipei 106, Taiwan (R.O.C).
Balamurugan
B
Thirumalraj
Electroanalysis and Bioelectrochemistry Lab, Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No. 1, Section 3, Chung-Hsiao East Road, Taipei 106, Taiwan (R.O.C).; Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Sauthi Arabia.. Electronic address: smchen78@ms15.hinet.net.
Shen-Ming
SM
Chen
Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Sauthi Arabia.
M Ajmal
MA
Ali
Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Sauthi Arabia.
Fahad M A
FM
Al-Hemaid
D002244:Carbon / Q000737:chemistry*; D004298:Dopamine / Q000032:analysis*; D015259:Dopamine Agents / Q000032:analysis*; D055664:Electrochemical Techniques / Q000379:methods; D004566:Electrodes; D037741:Fullerenes / Q000737:chemistry*; D057230:Limit of Detection; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D010084:Oxidation-Reduction; D010165:Palladium / Q000737:chemistry*; D015203:Reproducibility of Results
D015259:Dopamine Agents; D037741:Fullerenes; D010165:Palladium; D002244:Carbon; C069837:fullerene C60; D004298:Dopamine
Activated fullerene; Differential pulse voltammetry; Dopamine; Electrooxidation; Palladium nanoparticles; Screen printed carbon electrode