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Gold ultramicroelectrode arrays (UMEAs) modified with gold nanoparticles (GNP) are shown to be a highly suitable transducer platform for the fabrication of biosensors. Comparative studies were carried out with microelectrodes and UMEAs, the latter being either bare or modified with GNPs. GNPs could be electrodeposited on to the UMEA surface, thereby increasing its active area up to one hundred times...
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