A novel electro analytical nanosensor based on graphene oxide/silver nanoparticles for simultaneous determination of quercetin and morin Yola, Mehmet Lütfi [Sinop University, Faculty of Engineering, Department of Metallurgical and Materials Engineering, Sinop (Turkey)]; Gupta, Vinod Kumar, E-mail: vinodfcy@iitr.ac.in [Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667 (India)]; Eren, Tanju; Şen, Arif Emre; Atar, Necip [Dumlupınar University, Faculty of Arts and Sciences, Department of Chemistry, Kutahya (Turkey)] 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 77 NANOSCIENCE AND NANOTECHNOLOGY; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ABSORPTION; ABSORPTION SPECTROSCOPY; CYSTEAMINE; ELECTRODES; GRAPHENE; INFRARED SPECTRA; MORIN; NANOCOMPOSITES; NANOPARTICLES; OXIDATION; OXIDES; QUERCETIN; SENSITIVITY; SILVER; SPECTROPHOTOMETRY; TRANSMISSION ELECTRON MICROSCOPY; VOLTAMETRY; X-RAY DIFFRACTION; X-RAY PHOTOELECTRON SPECTROSCOPY Graphical abstract: - Abstract: In this report, silver nanoparticles (AgNPs) with the mean diameters of 10-30 nm were self-assembled onto the surfaces of 2-aminoethanethiol (2-AET) functionalized graphene oxide (AETGO) sheets. The graphene oxide (GO) and AgNPs-AETGO nanocomposites were characterized by a transmission electron microscope (TEM), x-ray photoelectron spectroscopy (XPS), reflection–absorption infrared spectroscopy (RAIRS) and the x-ray diffraction (XRD). The simultaneous determination of quercetin (QR) and morin (MR) has been performed on glassy carbon electrode (GCE) modified with AgNPs-AETGO (AgNPs-AETGO/GCE). QR presented an oxidation step at Ea of 200 mV and reduction step at Ec of 150 mV and RT presented an oxidation step at Ea of 600 mV at AgNPs-AETGO/GCE by cyclic voltammetry (CV). The linearity ranges and the detection limits of QR and MR were 1.0 × 10-8 - 5.0 × 10-6 M and 3.3 × 10-9 M, respectively. The AgNPs-AETGO/GCE was also applied to real samples for the simultaneous determination of QR and MR. Thus the developed method can be adopted as an alternative to the published chromatographic, spectrophotometric and electroanalytical methods for simultaneous determination of QR and MR. Available from http://dx.doi.org/10.1016/j.electacta.2013.12.086 United Kingdom 2014-02-01 English Journal Article Journal Name: Electrochimica Acta; Journal Volume: 120; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA) Medium: X; Size: page(s) 204-211 https://doi.org/10.1016/J.ELECTACTA.2013.12.086 PII: S0013-4686(13)02526-7 [] 120 Journal ID: ISSN 0013-4686; CODEN: ELCAAV; Other: PII: S0013-4686(13)02526-7; TRN: GB15R1090030645 INIS 2015-04-09 22324430