ENZYME ULTRA-THIN LAYER ELECTRODE PREPARED BY THE COADSORPTION OF POLY-L-LYSINE AND GLUCOSE-OXIDASE ONTO A MERCAPTOPROPIONIC ACID-MODIFIED GOLD SURFACE

An ultra-thin layer containing immobilized glucose oxidase was produce d through the co-adsorption of the enzyme and poly-L-lysine onto a mer captopropionic acid-modified gold electrode. The enzyme molecules were considered to be entrapped in a cross-linked matrix consisting of the carboxylic acid on the electrode and the cationic polymer.