Optical fibre based non-enzymatic glucose sensing over Cu2+-doped polyaniline hybrid matrix

•Cu2+-doped polyaniline coated optode was prepared.•Direct glucose oxidation on optode was investigated for non enzymatic glucose sensing.•The glucose sensors displayed a competitive detection limit, sensitivity and stability.

The opto-chemical glucose sensing over cupric ion doped polyaniline (Cu+2/PANI) hybrid polymer matrix coated glass rod based optode has been demonstrated.Cu+2/PANI hybrid matrix was synthesized by in situ chemical polymerization of intrinsically functionalized aniline. Furthermore, developed optode has been explored for direct oxidisation of glucose on Cu+2/PANI hybrid matrix for non-enzymatic glucose sensing employing O-dianisidine indicator system. The proposed glucose sensor works well in range of 50 mg/dL-200 mg/dL with response time of 15 s in artificial as well as in biological samples along with 40 days of lifespan.

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