Abstract
The sensing characteristics of extended gate field effect transistor (EGFET) as pH sensor based on V2O5 nanorods (NRs) was fabricated for the first time. The as-deposited V2O5 NRs onto glass substrate by using spray pyrolysis method have a diameter of 140-160 nm and a length of 300-500 nm. The V2O5 NRs based EGFET pH sensor exhibited a remarkable pH sensing performance due to the larger effective sensing surface area. The sensing sensitivity and linearity of the pH-EGFET sensor was found to be 54.9 mV/pH and 0.9859, respectively in the range of pH 2-12. V2O5 NRs sensor showed superior pH sensing stability and reliability, thereby can be considered as potential candidate for mass fabrication in disposable biosensors.