Fig. 1: Fabrication of double-layer graphene barrier films via Janus surface modification.
From: Principles for fabricating moisture barrier films via stacked Janus graphene layers
Schematics illustration of steps involved in the preparation of the double-layer graphene barrier films. After the growth, reactive ion etching (RIE) would introduce the fluorine- and oxygen-containing groups, followed by PVDF/ polyethylene naphthalate (PEN)-assisted etching of Cu foils. Oxygen plasma treatment introduces oxygen-containing groups on the other side of graphene. The coating of toluidine blue O (TBO) molecules is conducted on the inner graphene surface decorated by oxygen-containing groups, and the subsequent lamination of another Janus graphene layer would enable the sealing of intercalated TBO molecules possibly through π–π interaction between benzene rings of TBO and graphene planes.
