Graphene-silicon Schottky devices for operation in aqueous environments: Device performance and sensing application

Graphene/silicon Schottky diodes have recently been of heightened interest due to their high sensitivity towards surface chemical modifications. Here we demonstrate the operation of a graphene/n-type silicon Schottky junction in aqueous media, quantifying the impacts of the ionic strength, oxidation-reduction potential, and pH of an aqueous solution on diode characteristics. The roles of the electrical double layer and the surface functional …