Controlled fabrication of high-quality carbon nanoscrolls from monolayer graphene.
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.
Xie
Xu
X
Department of Physics and Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing 100084, China.
Ju
Long
L
Feng
Xiaofeng
X
Sun
Yinghui
Y
Zhou
Ruifeng
R
Liu
Kai
K
Fan
Shoushan
S
Li
Qunqing
Q
Jiang
Kaili
K
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
D012822:Silicon Dioxide; D006108:Graphite; D019840:2-Propanol