Iron(III)-Tosylate Doped PEDOT and PEG: A Nanoscale Conductivity Study of an Electrochemical System with Biosensing Applications

ROSATI, G.; L. D. SAPPIA; MADRID RE; ROZLÒSNIK, N.

Conferencia; ICBEBT 2017 : 19th International Conference on Biomedical Engineering and Biosensor Technologies; 2017

The addition of PEG of different molecular weights hasimportant effects on the physical, electrical and electrochemicalproperties of Iron(III)-Tosylate doped PEDOT. This particularpolymer can be easily spin coated over plastic discs, optimizingthickness and uniformity of the PEDOT-PEG films. The conductivityand morphological analysis of the hybrid PEDOT-PEG polymer byfour-point probe (4PP), twelve-point probe (12PP), and conductiveAFM (C-AFM) show strong effects of the PEG doping. Moreover, theconductive films kinetics at the nanoscale, in response to different biasvoltages, change radically depending on the PEG molecular weight.The hybrid conductive films show also interesting electrochemicalproperties, making the PEDOT PEG doping appealing for biosensingapplications both for EIS-based and amperometric affinity/catalyticbiosensors.BEST PAPER AWARD