title: Unexpected effect of copper ions on electrochemical impedance behaviour of self-assembled alkylaminethiol monolayer.
abstract: Effect of copper ions on the electrochemical behaviour of an alkylaminethiol monolayer has been studied by electrochemical impedance spectrosocpy. RAMAN experiment shows the effective adsorption of receptor onto the gold surfaces. The study of Nyquist plot shows that the gold/monolayer/electrolyte interface can be described by a serial combination of two R, CPE electrical circuits. In the presence of increasing amounts of copper, the Nyquist plots at low frequencies were modified showing an increase of the resistance of the second R, CPE electrical circuit. Moreover, this increase of resistance varies linearly with the amounts of copper ions added in solution from 10(-8) mol·L(-1) to 10(-5) mol·L(-1).
authors.affiliation: Université Paul Sabatier, Laboratoire de Génie Chimique, Bat. 2R1, 118 route de Narbonne, F-31062 Toulouse cedex 09, France; CNRS, Laboratoire de Génie Chimique UMR 5503, F-31062 Toulouse cedex 09, France.
authors.forename: Paul-Louis
authors.initials: PL
authors.lastname: Fabre
authors.affiliation: Université Paul Sabatier, Laboratoire de Génie Chimique, Bat. 2R1, 118 route de Narbonne, F-31062 Toulouse cedex 09, France; CNRS, Laboratoire de Génie Chimique UMR 5503, F-31062 Toulouse cedex 09, France.
authors.forename: Laure
authors.initials: L
authors.lastname: Latapie
authors.affiliation: CNRS, Laboratoire d'Analyses et d'Architectures des Systèmes, UPR 8001, 7 Avenue du Colonel Roche, 31077 Toulouse Cedex4, France.
authors.forename: Jérôme
authors.initials: J
authors.lastname: Launay
authors.affiliation: Université Paul Sabatier, Laboratoire de Génie Chimique, Bat. 2R1, 118 route de Narbonne, F-31062 Toulouse cedex 09, France; CNRS, Laboratoire de Génie Chimique UMR 5503, F-31062 Toulouse cedex 09, France. Electronic address: reynes@chimie.ups-tlse.fr.
authors.forename: Olivier
authors.initials: O
authors.lastname: Reynes
authors.affiliation: CNRS, Laboratoire d'Analyses et d'Architectures des Systèmes, UPR 8001, 7 Avenue du Colonel Roche, 31077 Toulouse Cedex4, France.
authors.forename: Pierre
authors.initials: P
authors.lastname: Temple-Boyer
mesh_terms: D003198:Computer Simulation; D003300:Copper / Q000737:chemistry*; D003543:Cysteamine / Q000737:chemistry*; D017097:Electric Impedance; D004563:Electrochemistry / Q000379:methods*; D004566:Electrodes; D006046:Gold; D007477:Ions; D013059:Spectrum Analysis, Raman
chemical_list: D007477:Ions; D003543:Cysteamine; D006046:Gold; D003300:Copper