Ion-exchange voltammetry at polymer film-coated nanoelectrode ensembles

P Ugo; L M Moretto; S Bellomi; V P Menon; C R Martin

doi:10.1021/ac960580b

Ion-exchange voltammetry at polymer film-coated nanoelectrode ensembles

Anal Chem. 1996 Dec 1;68(23):4160-5. doi: 10.1021/ac960580b.

Authors

P Ugo¹, L M Moretto, S Bellomi, V P Menon, C R Martin

Affiliation

¹ Department of Physical Chemistry, University of Venice, Venice, Italy, and Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872.

PMID: 21619326
DOI: 10.1021/ac960580b

Abstract

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.