Artículo de revista
Fabrication of novel shape Cu and Cu/Cu2O nanoparticles modified electrode for the determination of dopamine and paracetamol
Fecha
2016Registro en:
Journal of Molecular Liquids. Volumen: 221 Páginas: 930-941
10.1016/j.molliq.2016.06.028
Autor
Devaraj, Manoj
Saravanan, R.
Deivasigamani, RanjithKumar
Gupta, Vinod Kumar
Gracia Caroca, Francisco
Jayadevan, Santhanalakshmi
Institución
Resumen
In this paper, we demonstrate and compare the synthesis of copper (Cu) and copper(I) oxide on Cu (Cu/Cu2O) nanoparticles via thermal decomposition method using a combination of oleic acid and oleylamine and oleic acid alone. Using a combination of oleic acid and oleylamine, involves a single nucleation step and control in growth of nanoparticles produces high monodispersity in shape and protects the copper nanoparticles against oxidation. X-ray diffraction (XRD) confirms the formation of single phase Cu only and X-ray photoelectron spectroscopy (XPS) evidences the formation of Cu without any formation of oxides on surfaces for over a long period of time with good stability. In view of interest in electrochemical sensors, we explore the fabrication of a novel and highly sensitive electrode and compare the electrochemical current responses for simultaneous determination of paracetamol and dopamine using Cu/Cu2O nanoparticles stabilized by oleic acid alone and Cu nanoparticles obtained from a combination of oleic acid and oleylamine. Interestingly, we observe that Cu/Cu2O nanoparticles stabilized by oleic acid alone exhibit excellent electrochemical enhancement in the peak current response towards simultaneous determination of paracetamol and dopamine with an increase in peak-peak separation of 239 my. Differential pulse voltammetry (DPV) studies show a linear response to dopamine within the concentration from 0.02 mu M to 0.159 mu M with a detection limit of 327 nM (S/N = 3). (C) 2016 Elsevier B.V. All rights reserved.