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Title: Impedimetric investigation of gold nanoparticles - guanine modified electrode

In this paper we report the preparation of a modified electrode with gold nanoparticles and guanine. The colloidal suspension of gold nanoparticles was obtained by Turkevich method and was next analyzed by UV-Vis spectroscopy and Transmission Electron Microscopy (TEM). The gold electrode was modified by self-assembling the gold nanoparticles with guanine, the organic molecule playing also the role of linker. The electrochemical characteristics of the bare and modified electrode were investigated by Electrochemical Impedance Spectroscopy (EIS). A theoretical model was developed based on an electrical equivalent circuit which contain solution resistance (R{sub s}), charge transfer resistance (R{sub ct}), Warburg impedance (Z{sub W}) and double layer capacitance (C{sub dl})
Authors:
; ; ;  [1] ;  [2] ;  [3]
  1. National Institute for Research and Development of Isotopic and Molecular Technologies, Cluj-Napoca (Romania)
  2. Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, Cluj-Napoca (Romania)
  3. Faculty of Biology and Geology, Babes-Bolyai University, Cluj-Napoca (Romania)
Publication Date:
OSTI Identifier:
22257190
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1565; Journal Issue: 1; Conference: PIM 2013: International conference on processes in isotopes and molecules, Cluj Napoca (Romania), 25-27 Sep 2013; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ELECTRODES; EQUIVALENT CIRCUITS; GOLD; GUANINE; NANOSTRUCTURES; PARTICLES; SPECTROSCOPY; SUSPENSIONS; TRANSMISSION ELECTRON MICROSCOPY