Rose-like CuO nanostructures for highly sensitive glucose chemical sensor application

This paper reports the synthesis, characterization and glucose chemical sensing applications of well-crystalline rose-like CuO nanostructures. The rose-like CuO nanostructures were synthesized by facile hydrothermal process at low-temperature and characterized in detail in terms of their morphological, compositional, structural, optical and sensing properties. The detailed characterizations revealed that the synthesized rose-like CuO nanostructures are nanocrystalline and possessing monoclinic structure. Further, the synthesized nanostructures were used as efficient electron mediator to fabricate non-enzymatic glucose sensor. The fabricated glucose chemical sensor shows a very high sensitivity of ~4.640 μA mM−1 cm−2 and an experimental detection limit of ~0.39 mM with correlation coefficient (R) of 0.9498. The observed linear dynamic range for the fabricated chemical sensor was from 0.78 mM to 100 mM. The presented work demonstrates that simply prepared CuO nanomaterials can efficiently be used to fabricate reliable and reproducible glucose chemical sensors.