title: Controllable fabrication of ultrathin free-standing graphene films.
abstract: Graphene free-standing film-like or paper-like materials have attracted great attention due to their intriguing electronic, optical and mechanical properties and potential application in chemical filters, molecular storage and supercapacitors. Although significant progress has been made in fabricating graphene films or paper, there is still no effective method targeting ultrathin free-standing graphene films (UFGFs). Here, we present a modified filtration assembly method to prepare these ultrathin films. With this approach, we have fabricated a series of ultrathin free-standing graphene oxide films and UFGFs, up to 40 mm in diameter, with controllable thickness from micrometre to nanoscale (approx. 40 nm) dimensions. This method can be easily scaled up and the films display excellent optical, electrical and electrochemical properties. The ability to produce UFGFs from graphene oxide with a scalable, low-cost approach should take us a step closer to real-world applications of graphene.
authors.affiliation: Beijing National Laboratory for Molecular Sciences, Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, , Beijing 100190, People's Republic of China.
authors.forename: Jianyi
authors.initials: J
authors.lastname: Chen
authors.forename: Yunlong
authors.initials: Y
authors.lastname: Guo
authors.forename: Liping
authors.initials: L
authors.lastname: Huang
authors.forename: Yunzhou
authors.initials: Y
authors.lastname: Xue
authors.forename: Dechao
authors.initials: D
authors.lastname: Geng
authors.forename: Hongtao
authors.initials: H
authors.lastname: Liu
authors.forename: Bin
authors.initials: B
authors.lastname: Wu
authors.forename: Gui
authors.initials: G
authors.lastname: Yu
authors.forename: Wenping
authors.initials: W
authors.lastname: Hu
authors.forename: Yunqi
authors.initials: Y
authors.lastname: Liu
authors.forename: Daoben
authors.initials: D
authors.lastname: Zhu
keywords: graphene; graphene oxide; ultrathin free-standing graphene films; ultrathin free-standing graphene oxide films