A Study of the Modification of the Gold Electrode Surface with a Calix[4]arene Self-Assembled Monolayer

0346607 - ÚFCH JH 2011 RIV DE eng J - Journal Article
Šustrová, Barbora - Štulík, Karel - Mareček, Vladimír - Janda, Pavel
A Study of the Modification of the Gold Electrode Surface with a Calix[4]arene Self-Assembled Monolayer.
Electroanalysis. Roč. 22, 17-18 (2010), s. 2051-2057. ISSN 1040-0397. E-ISSN 1521-4109.
[International Conference on Modern Electroanalytical Methods. Prague, 09.12.2009-14.12.2009]
R&D Projects: GA AV ČR IAA400400806
Institutional research plan: CEZ:AV0Z40400503
Keywords : Calix[4]arene * Self-assembled monolayer (SAM) * ionophores
Subject RIV: CG - Electrochemistry
Impact factor: 2.721, year: 2010

Substituted calix[4]arene molecules were used to modify the gold disk electrode surface and the electrochemical properties of this electrode were compared with those of the bare electrode. Cyclic voltammetry measurements permitted the calculation of a Langmuir-type adsorption isotherm for the formation of the calixarene SAM. The calixarene adsorption from chloroform solution appeared to be more effective, compared to the adsorption from DMF solution, but the process was less reproducible. Preliminary results, obtained by the atomic force microscopy measurements, indicate that the calixarene molecules form a stable monolayer on the Au(111) surface and the SAM structure depends on the solvent used. Impedance measurements demonstrate that the capacity of the modified electrode varies in the presence of ions, depending on their size and shape; this can potentially be utilized in designing ion-selective sensors.
Permanent Link: http://hdl.handle.net/11104/0187591