NM08.06.16 : A Facile Fabrication of Pristine Large-Area Graphene Films for Flexible Optoelectronics

5:00 PM–7:00 PM Apr 4, 2018

PCC North, 300 Level, Exhibit Hall C-E

Inho Kim1 Hongju Jung1 Jongwon Shim1 Sang Ouk Kim1

1, Korea Advanced Institute of Science and Technology, Daejeon, , Korea (the Republic of)

Here, we report an ultrafast synthesizing method for large area transparent film of assembled pristine graphene platelets at liquid surface in two-minutes. Some 2−.3 layer pristine graphene platelets temporally solvated with N-methyl-2-pyrrolidone (NMP) are assembled at the surface of a dilute aqueous suspension using an evaporation-driven Rayleigh-Taylor instability and then are driven together by Marangoni forces. At their edges, physical binding works and the platelets are fixed. Typically, 8-cm-diameter circular graphene films are grown in two minutes. After graphene films formed, the films can be transferred onto various substrates with flat or textured topologies. This interfacial assembly protocol is generally applicable to other nanomaterials, including 0D fullerene and 1D carbon nanotubes, which commonly suffer from limited solution compatibility.