Control of Water Adsorption via Electrically Doped Graphene: Effect of Fermi Level on Uptake and H ₂ O Orientation

The interaction of graphene with water molecules under an applied electric field is not thoroughly understood, yet this important to many thermal, fluidic, and electrical applications graphene. In work, the effect doping on adsorption studied through isotherms current–voltage (IV) characterizations as a function Fermi level. onto increases by ≈15% levels increase factor three gate-to-graphene voltage +20 or −20 V compared 0 for sub-monolayer adsorption. This change in uptake attributed density state upon electrical-doping, which changes Coulombic van der Waals interactions. either n- p-doping depending voltage. ambi-doping nature due polar molecules, so depends orientation molecules.