Ion-sensing properties of 1D vanadium pentoxide nanostructures

The application of one-dimensional (1D) V(2)O(5)·nH(2)O nanostructures as pH sensing material was evaluated. 1D V(2)O(5)·nH(2)O nanostructures were obtained by a hydrothermal method with systematic control of morphology forming different nanostructures: nanoribbons, nanowires and nanorods. Deposited onto Au-covered substrates, 1D V(2)O(5)·nH(2)O nanostructures were employed as gate material in pH sensors based on separative extended gate FET as an alternative to provide FET isolation from the chemical environment. 1D V(2)O(5)·nH(2)O nanostructures showed pH sensitivity around the expected theoretical value. Due to high pH sensing properties, flexibility and low cost, further applications of 1D V(2)O(5)·nH(2)O nanostructures comprise enzyme FET-based biosensors using immobilized enzymes.