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PEDOT : PSS ‐grafted graphene oxide‐titanium dioxide nanohybrid‐based conducting paper for glucose detection
Author(s) -
Paul Geetu,
Verma Sakshi,
Jalil Owais,
Thakur Deeksha,
Pandey Chandra Mouli,
Kumar Devendra
Publication year - 2021
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.5213
Subject(s) - materials science , pedot:pss , graphene , titanium dioxide , thermogravimetric analysis , fourier transform infrared spectroscopy , chemical engineering , oxide , dielectric spectroscopy , ethylene glycol , nuclear chemistry , conductivity , electrochemistry , nanotechnology , electrode , chemistry , composite material , layer (electronics) , engineering , metallurgy
In this work, efforts have been made to develop a conducting paper‐ (CP) based biosensor using poly(3,4ethylenedioxythiophene): poly(4‐styrene sulfonate) (PEDOT:PSS)‐grafted reduced graphene oxide‐titanium dioxide (rGO‐TiO 2 ) nanohybrid. The effect of different dopant (ethylene glycol [EG], glycerine and methanol) on the conductivity of the paper has been investigated, and it was observed that the conductivity of the CP significantly increases from 6.9 × 10 −5 S/cm to 1.1 × 10 −4 S/cm on treatment with EG. While, after the incorporation rGO‐TiO 2 nanohybrid into PEDOT:PSS‐grafted paper, the conductivity increased to 4.9 × 10 −2 S/cm. The fabricated flexible rGO‐TiO 2 @CP was characterized using X‐ray diffraction, Thermogravimetric analysis, scanning electron microscopy, FTIR spectroscopy, and amperometric techniques. The developed rGO‐TiO 2 @CP has been utilized for the immobilization of glucose oxidase for the quantitative estimation of glucose. Electrochemical results reveal that the modified CP shows high sensitivity (94.98 μAmM −1 cm −2 ) with a low limit of detection (0.01 mM) and can be a promising substitute over other expensive conventional electrodes.