Fabrication and Characterization of Highly Sensitive Acetone Chemical Sensor Based on ZnO Nanoballs.

Highly sensitive acetone chemical sensor was fabricated using ZnO nanoballs modified silver electrode. A low temperature, facile, template-free hydrothermal technique was adopted to synthesize the ZnO nanoballs with an average diameter of 80 ± 10 nm. The XRD and UV-Vis. studies confirmed the excellent crystallinity and optical properties of the synthesized ZnO nanoballs. The electrochemical sensing performance of the ZnO nanoballs modified AgE towards the detection of acetone was executed by simple current-voltage (I-V) characteristics. The sensitivity value of ∼472.33 µA·mM-1·cm-2 and linear dynamic range (LDR) of 0.5 mM-3.0 mM with a correlation coefficient (R²) of 0.97064 were obtained from the calibration graph. Experimental limit of detection (LOD) for ZnO nanoballs modified AgE was found to be 0.5 mM.