▎ 摘　　要

A facile way to fabricate robust free-standing BCP thin films with perpendicularly orientated microdomains on a CVD-grown monolayer graphene support is reported. Graphene acts as both the neutral surface to control the assembly of the BCP film and the support of the thin film to provide high mechanical strength. The free-standing BCP films with the nanopattern can be used as a substrate-independent template to facilitate BCP nano-lithography.