Au-ZnO bullet-like heterodimer nanoparticles: synthesis and use for enhanced nonenzymatic electrochemical determination of glucose

Kumar, Deivasigamani Ranjith; Manoj, Devaraj; Santhanalakshmi, Jayadevan

Abstract

In this work, the gold nanoseed mediated growth of bullet-like gold-zinc oxide (Au-ZnO) heterodimer nanoparticles has been reported. A formation pathway for the bullet-like morphology has been proposed. The heterojunction effect of the Au-ZnO nanoparticles was studied using UV-vis spectroscopy, X-ray photoelectron spectroscopy (XPS), high resolution transmission electron microscopy (HRTEM) and electrochemical impedance spectroscopy (EIS). The bullet-like Au-ZnO heterodimer nanoparticles were effectively employed as a sensor for the nonenzymatic determination of glucose (GLU) in a Au-ZnO/MWCNTs/GC modified electrode. This showed good sensitivity and a wide linear range of 19-291 mu M with a sensitivity of 0.0447 mA mu M-1 and a limit of detection of 0.19 mu M. The resulting sensor displayed excellent repeatability and long-term stability.

Más información

Título según WOS: ID WOS:000330800700002 Not found in local WOS DB
Título de la Revista: RSC ADVANCES
Volumen: 4
Número: 18
Editorial: ROYAL SOC CHEMISTRY
Fecha de publicación: 2014
Página de inicio: 8943
Página final: 8952
DOI:

10.1039/c3ra45269g

Notas: ISI