oxide (GO) films into highly conductive graphene films without destroying their integrity and
flexibility at low temperature based on the nucleophilic substitution reaction. GO films
reduced for 1h at 100° C in 55% hydroiodic (HI) acid have an electrical conductivity as high
as 298S/cm and a C/O ratio above 12, both of which are much higher than films reduced by
other chemical methods. The reduction maintains good integrity and flexibility, and even …