▎ 摘　　要

In this work, a conductive type Graphene Oxide (GO)-based pellet sensor has been fabricated and fruit ripeness condition is monitored via Ethylene gas sensing. GO was prepared by standard Hummer's method, and morphological and structural characterizations have been performed using field emission scanning electron microscopy (FESEM), X-ray powder diffraction (XRD), and Raman spectroscopy analysis. Four different types of fruits of same weight (orange, banana, guava, and mango) were used for sensor response measurements. Fruit samples were kept in a closed chamber at room temperature, and the change in conductivity of the sensor pellet was observed with increase in emitted Ethylene concentration in the chamber which was cross-verified with standard MSR sensor. The sensor showed almost linear response in the Ethylene concentration range of 40-120 PPM, and it was observed that orange samples produce maximum response for the GO pellet sensor with a sensitivity of 0.06 mu Amp/PPM for a fixed exposure time. The sensor was found capable to successfully differentiate between four individual fruit samples in perfect ripening condition which cloud be utilized in fruit detector e-nose application. Also, the sensor pallets showed good reproducibility and repeatability which makes them ideal for cost-efficient measurement of Ethylene gas.