Nanomaterials play an important role in the fabrication of chemosensors and biosensors, due to their
unique physical and chemical properties, such as large surface area/volume ratio, good conductivity,
excellent electrocatalytic activity and high mechanical strength. We review recent advances in the applications
of these nanomaterials in potentiometric sensors. We highlight the development of stable solidstate
polymeric membrane ion-selective electrodes (ISEs). We describe ISEs based on ionophore-modified
nanomaterials. Also, we present highly-sensitive potentiometric biosensors based on nanomaterials.