Controlled graphene oxidation and its implication in gFETs response to changes in pH

MARTINA ROSSOTTI; AGUSTIN CANTILO; JOAQUIN DIFORTI; ESTEBAN PICCININI; MARMISOLLE, WALDEMAR A.; AZZARONI, OMAR

Encuentro; LatinXChem2021; 2021

https://www.latinxchem.org/

It is well known that graphene field-effect transistors (gFETs) are sensitive to changes inthe pH of the solution in which they are immersed, and this phenomenon allows the(bio)sensing of different analytes.1,2 In this work, we study a possible treatment toincrease the pH sensitivity of gFETs. Under the hypothesis that gFETs with a greateroxidation degree could have more sensitivity to pH changes due to the highest surfacedensity of oxygenated groups;3 we analyze the effect of partial oxidation of graphenewith an UV and O2 treatment.