The absorption and reflectivity spectra confirmed the recognition process occurring between
mercaptophenylboronic acid and D-glucose inside the pH-sensitive polymeric matrix. A potentiometric response
of MPBA–AuNP-modified PANI electrodes towards D-glucose in the concentration range from 0.31 up to 33 mM
with a sensitivity of+47mV/decadewas verified. TheMPBA–AuNP-modified PANI film can be considered to be a
saccharide-sensitive receptor layer exhibiting an indirect mechanism of signal generation