Surfactant molecules make liquid phase exfoliated graphene a switching element for resistive random access memory applications

Abstract

Few-layer graphene sheets with less conductivity have been chemically exfoliated using dioctyl sulfosuccinate sodium salt as the surfactant. The resistive memory devices fabricated using these liquid-phase exfoliated graphene (LPEG) thin films exhibit reversible volatile memory characteristics. While single layer graphene is known for exhibiting volatile memory behaviour, LPEG opens up a chemical route for low-cost memory option with a low thermal budget compared to the chemical vapour deposited monolayer graphene. The LPEG memory devices show good data retention and reliable write-read-erase endurance over 300 cycles.