Electrodeposition of ZnCo2O4 nanoparticles for biosensing applications

We report the growth of ZnCo2O4 nanoparticles on indium tin oxide (ITO) coated glass substrates by a simple and highly reproducible electrodeposition method. The as-deposited ZnCo2O4 nanoparticles are characterized by various structural and microscopical tools for assessing their crystalline and morphological features. Electrochemical sensing properties of the as-prepared ZnCo2O4 nanoparticles towards glucose and dopamine are studied. ZnCo2O4 nanoparticles show linear response with respect to change in glucose concentration varying from 10 to 290 mM and possess an LOD value of 36.9 mu M and a sensitivity of 0.92 mu A mu M-1 cm(-2). In a similar way, ZnCo2O4 exhibits a linear response with respect to change in dopamine concentration varying from 5-100 mu M with an LOD value of 15.4 mu M and a sensitivity of 0.55 mu A mu M-1 cm(-2) respectively.