Ion-Exchange Voltammetry at Polymer Film-Coated Nanoelectrode Ensembles

• Published in: Analytical chemistry (Washington) Vol. 68; no. 23; pp. 4160 - 4165
• Main Authors: Ugo, Paolo, Moretto, Ligia M, Bellomi, Sara, Menon, Vinod P, Martin, Charles R
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 01.12.1996
• Subjects: Chemistry; Electrochemistry; Electrodes: preparations and properties; Exact sciences and technology; General and physical chemistry; Ion selective electrodes; Cationic complex; Gold; Electrode production; Sodium Nitrates; Lithium Perchlorates; Transition metal; Partition coefficient; Nanostructure; Transition metal Complexes; Experimental study; Thin film; Ion selective electrode; Sulfonate polymer; Detection limit; Cation exchange membrane; Ruthenium Complexes; Polycarbonate; Comparative study; Disk electrode; Modified material
• ISSN: 0003-2700; 1520-6882
• DOI: 10.1021/ac960580b

Ensembles of nanoscopic disk-shaped electrodes have been shown to offer enhancements in electroanalytical detection limits relative to electrodes of macroscopic dimensions (e.g., disk electrodes with diameters of ∼1 mm). Enhancements in electroanalytical detection limits have also been observed at macroscopic electrodes that have been coated with films of ion-exchange polymers. In this paper we combine these two concepts. We demonstrate that a nanoelectrode ensemble (NEE) that has been coated with a thin film of the Kodak ion-exchange polymer AQ 55 shows enhanced electroanalytical detection limits relative to the uncoated NEE and to the coated macroscopic electrode. To our knowledge, this is the first investigation of the electrochemistry, and the electroanalytical advantages, of polymer film-coated NEEs.