title: Interwall Friction and Sliding Behavior of Centimeters Long Double-Walled Carbon Nanotubes.
abstract: Here, we studied the interwall friction and sliding behaviors of double-walled carbon nanotubes (DWCNTs). The interwall friction shows a linear dependence on the pullout velocity of the inner wall. The axial curvature in DWCNTs causes the significant increase of the interwall friction. The axial curvature also affects the sliding behavior of the inner wall. Compared with the axial curvature, the opening ends of DWCNTs play tiny roles in their interwall friction.
authors.affiliation: Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University , Beijing 100084, China.
authors.forename: Rufan
authors.initials: R
authors.lastname: Zhang
authors.affiliation: Key Laboratory for the Physics and Chemistry of Nanodevices, Peking University , Beijing 100871, China.
authors.forename: Zhiyuan
authors.initials: Z
authors.lastname: Ning
authors.affiliation: Institute of Textiles and Clothing, Hong Kong Polytechnic University , Kowloon, Hong Kong 999077, China.
authors.forename: Ziwei
authors.initials: Z
authors.lastname: Xu
authors.affiliation: Department of Chemistry and Center for Nano and Micro Mechanics, Tsinghua University , Beijing 100084, China.
authors.forename: Yingying
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University , Beijing 100084, China.|Department of Chemistry and Center for Nano and Micro Mechanics, Tsinghua University , Beijing 100084, China.
authors.forename: Huanhuan
authors.initials: H
authors.lastname: Xie
authors.affiliation: Institute of Textiles and Clothing, Hong Kong Polytechnic University , Kowloon, Hong Kong 999077, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Ding
authors.affiliation: Key Laboratory for the Physics and Chemistry of Nanodevices, Peking University , Beijing 100871, China.
authors.forename: Qing
authors.initials: Q
authors.lastname: Chen
authors.affiliation: Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University , Beijing 100084, China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University , Beijing 100084, China.
authors.forename: Weizhong
authors.initials: W
authors.lastname: Qian
authors.affiliation: Department of Materials Science and Engineering, Stanford University , Stanford, California 94305, United States.|Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory , 2575 Sand Hill Road, Menlo Park, California 94025, United States.
authors.forename: Yi
authors.initials: Y
authors.lastname: Cui
authors.affiliation: Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University , Beijing 100084, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Wei
keywords: Carbon nanotubes; curvature; friction; interaction; superlubricity; ultralong