title: Controlled fabrication of high-quality carbon nanoscrolls from monolayer graphene.
abstract: We report a simple and effective way of fabricating high-quality carbon nanoscrolls (CNSs), using isopropyl alcohol solution to roll up monolayer graphene predefined on SiO(2)/Si substrates. Transmission electron microscopy studies reveal that the CNS has a tube-like structure with a hollow core surrounded by graphene walls 0.35 nm apart. Raman spectroscopy studies show that the CNS is free of significant defects, and the electronic structure and phonon dispersion are slightly different from those of two-dimensional graphene. Finally, the CNS-based device is fabricated, directly on the SiO(2)/Si substrate. Electrical-transport measurements show that its resistance is weakly gate-dependent but strongly temperature-dependent. In addition, the CNS can sustain a high current density up to 5 x 10(7) A/cm(2), indicating that it is a good candidate for microcircuit interconnects. The controlled fabrication of high-quality CNSs may open up new opportunities for both fundamental and applied research of CNSs.
authors.affiliation: Department of Physics and Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing 100084, China.
authors.forename: Xu
authors.initials: X
authors.lastname: Xie
authors.forename: Long
authors.initials: L
authors.lastname: Ju
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Feng
authors.forename: Yinghui
authors.initials: Y
authors.lastname: Sun
authors.forename: Ruifeng
authors.initials: R
authors.lastname: Zhou
authors.forename: Kai
authors.initials: K
authors.lastname: Liu
authors.forename: Shoushan
authors.initials: S
authors.lastname: Fan
authors.forename: Qunqing
authors.initials: Q
authors.lastname: Li
authors.forename: Kaili
authors.initials: K
authors.lastname: Jiang
mesh_terms: D019840:2-Propanol / Q000737:chemistry; D055664:Electrochemical Techniques; D006108:Graphite / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D049329:Nanostructures / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D012822:Silicon Dioxide; D006108:Graphite; D019840:2-Propanol