Ion-Exchange Voltammetry at Polymer Film-Coated Nanoelectrode Ensembles

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• 作者：Paolo Ugo ; Ligia M. Moretto ; Sara Bellomi ; Vinod P. Menon ; and Charles R. Martin
• 刊名：Analytical Chemistry
• 出版年：1996
• 出版时间：December 1, 1996
• 年：1996
• 卷：68
• 期：23
• 页码：4160 - 4165
• 全文大小：149K
• 年卷期：v.68,no.23(December 1, 1996)
• ISSN：1520-6882

文摘

Ensembles of nanoscopic disk-shaped electrodes havebeen shown to offer enhancements in electroanalyticaldetection limits relative to electrodes of macroscopicdimensions (e.g., disk electrodes with diameters of ~1mm). Enhancements in electroanalytical detectionlimitshave also been observed at macroscopic electrodes thathave been coated with films of ion-exchange polymers.Inthis paper we combine these two concepts. We demonstrate that a nanoelectrode ensemble (NEE) that has beencoated with a thin film of the Kodak ion-exchange polymerAQ 55 shows enhanced electroanalytical detection limitsrelative to the uncoated NEE and to the coated macroscopic electrode. To our knowledge, this is the firstinvestigation of the electrochemistry, and the electroanalytical advantages, of polymer film-coated NEEs.