Repository URL:
http://scholarworks.unist.ac.kr/handle/201301/21675
PMID:
28218542
DOI:
10.1021/acs.nanolett.6b04459
Author(s):
Wang, Bin, Huang, Ming, Kim, Na Yeon, Cunning, Benjamin V., Huang, Yuan, Qu, Deshun, Chen, Xianjue, Jin, Sunghwan, Biswal, Mandakini, Zhang, Xu, Lee, Sun Hwa, Lim, Hyunseob, Yoo, Won Jong, Lee, Zonghoon, Ruoff, Rodney S. Show More Hide
Publisher(s):
American Chemical Society (ACS), AMER CHEMICAL SOC
Tags:
Chemical Engineering, Chemistry, Materials Science, Physics and Astronomy, Engineering, fold, Graphene, single crystal, twisted bilayer
article description
Folded graphene in which two layers are stacked with a twist angle between them has been predicted to exhibit unique electronic, thermal, and magnetic properties. We report the folding of a single crystal monolayer graphene film grown on a Cu(111) substrate by using a tailored substrate having a hydrophobic region and a hydrophilic region. Controlled film delamination from the hydrophilic region was used to prepare macroscopic folded graphene with good uniformity on the millimeter scale. This process was used to create many folded sheets each with a defined twist angle between the two sheets. By identifying the original lattice orientation of the monolayer graphene on Cu foil, or establishing the relation between the fold angle and twist angle, this folding technique allows for the preparation of twisted bilayer graphene films with defined stacking orientations and may also be extended to create folded structures of other two-dimensional nanomaterials.