Highly-efficient fabrication of nanoscrolls from functionalized graphene oxide by Langmuir–Blodgett method

Highly-efficient fabrication of carbon nanoscrolls (CNSs) from functionalized graphene oxide by Langmuir–Blodgett method: (a) Scattered sheets float on the water surface. (b) Close-packed monolayer of sheets forms. (c) CNSs begin to form. (d) Scrolling proceeds. (e) CNS monolayer collapses and bundles form. (f) Loose (individual CNSs) – dense (bundle) pattern forms. [Display omitted] ► Carbon nanoscrolls (CNSs) are fabricated by Langmuir-Blodgett (LB) method. ► Loose-dense pattern of CNSs is formed during the LB compression process. ► Specific solvents can cause unwinding of the scrolled structures. We report a Langmuir–Blodgett (LB) approach for highly-efficient fabrication of nanoscrolls from functionalized graphene oxide single sheets. Transmission electron microscope study reveals that the scroll has a tubular structure without caps at its ends. The scrolls align parallel to the moving barriers of the LB equipment and exhibit a loose-dense pattern during the LB compression process. We find that specific solvents can unwind the scrolled structures. Electrical characterization of the well-aligned scrolls was also performed. The method demonstrated here opens up a new avenue for high-yield fabrication of carbon nanoscrolls using functionalized graphene oxide as the building blocks.