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In Association with
Solution-processed PEDOT: PSS/graphene composites as the electro-active paper for biosensor application
6th World Congress on Biotechnology
Saurabh Kumar1, Suveen Kumar1, Shine Augustine1, Birendra K Yadav2, Jai G Sharma1, Dinesh C Doval2 and Bansi D Malhotra1
1Delhi Technological University, India 2Rajiv Gandhi Cancer Institute and Research Centre, India
Posters-Accepted Abstracts: J Biotechnol Biomater
Abstract
Composites of poly (3, 4-ethylenedioxythiophene): poly (styrenesulfonate) (PEDOT: PSS) and reduced graphene oxide (rGO) have been prepared by solution mixing and applied as electro-active paper. The effect of different solvent on conductivity was investigated; conductivity increased with treatment of electro-active paper with ethylene glycol by more than 250 times. Other solvents like methanol and H2SO4 were also used to treat the PEDOT: PSS/rGO based electro-active paper and showed inferior conductivity enhancement compared to ethylene glycol. The result provide direct evidence that the improvement in electric conductivity on paper substrate by ethylene glycol is mainly caused by conformational rearrangement in the polymer and ordering of PEDOT fibre over electro-active paper. Reduce graphene oxide increased the electrochemical properties of electro-active paper, probing by Fe(CN)63-/4- redox species using electrochemical impedance spectroscopy and chronoamperometry method. This electrochemical behavior makes the ethylene glycol-treated PEDOT: PSS/rGO paper electrode (electro-active paper) a promising platform for low cost electrochemical biosensor. The results of electrochemical response studies conducted onto anti-CEA (carcinoembryonic antigen) immobilized electro-active paper for human carcinoembryonic antigen (CEA) detection, reveals high sensitivity of 25.8 �¼A ml ng-1 in a physiological range, 1-10 ng ml-1.Biography
Email: sau2203@gmail.com
