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COMMUNICATION
Ultratough, Ultrastrong, and Highly Conductive Graphene Films with Arbitrary Sizes Miao Zhang, Liang Huang, Ji Chen, Chun Li,* and Gaoquan Shi* Graphene films have attracted increasing attention owing to their unique structures, excellent properties,[1] and wide applications in conductive substrates,[2] filtration membranes,[3] and electrode materials for energy storage devices.[4] A prerequisite for these applications is to develop convenient techniques for the massproduction of robust and highly conductive graphene films. The pioneering work of Ruoff and co-workers on paper-like graphene oxide (GO) films[5] has inspired a series of approaches, including vacuum filtration,[5,6] layer-by-layer deposition,[7] water evaporation,[8] interfacial reduction,[4c,9] and cast drying of GO liquid crystals,[10] that have been developed to prepare chemically modified graphene (CMG, including GO and reduced GO (rGO))[11] films. However, pure CMG films are brittle with small strains at break (
COMMUNICATION
Ultratough, Ultrastrong, and Highly Conductive Graphene Films with Arbitrary Sizes Miao Zhang, Liang Huang, Ji Chen, Chun Li,* and Gaoquan Shi* Graphene films have attracted increasing attention owing to their unique structures, excellent properties,[1] and wide applications in conductive substrates,[2] filtration membranes,[3] and electrode materials for energy storage devices.[4] A prerequisite for these applications is to develop convenient techniques for the massproduction of robust and highly conductive graphene films. The pioneering work of Ruoff and co-workers on paper-like graphene oxide (GO) films[5] has inspired a series of approaches, including vacuum filtration,[5,6] layer-by-layer deposition,[7] water evaporation,[8] interfacial reduction,[4c,9] and cast drying of GO liquid crystals,[10] that have been developed to prepare chemically modified graphene (CMG, including GO and reduced GO (rGO))[11] films. However, pure CMG films are brittle with small strains at break (
