Voltammetric Response of Phenylboronic Acid Polymer-Modified Gold Electrode to Sugars
The surface of a gold (Au) disk electrode was coated with a layered thin film consisting of poly(allylamine) bearing phenylboronic acid (PBA) moieties in the side chains to fabricate a voltammetric sensor sensitive to sugars. The modified Au electrode exhibited a voltammetric response to sugars in the presence of [Fe(CN)6]3− ion in the sample solution at a neutral pH. The peak current of the cyclic voltammograms decreased depending on the type and concentration of sugars, as a result of the formation of PBA-sugar adduct on the surface of the film. The dynamic range of the electrode is 1–100 mM for glucose and 0.1–10 mM for fructose, the sensitivity being ca. 5 A/decade for glucose and ca. 6 A/decade for fructose.
Keywords: ELECTRODE; PHENYLBORONIC ACID; SUGAR SENSOR; THIN FILM
Document Type: Research Article
Publication date: 01 September 2005
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