Tunable Negative Poissons Ratio of 3D Spanned-Fullerene Nanotube Nanotruss
CNT-based network,as an emerging class of material,attracts extensive research interest in recent years from both the scientific community and industry.In this study we proposed novel covalently bonded bcc-lattice like 3D nanotruss made up of fullerenes spanned by CNTs.The mechanical properties of such architecture are systematically investigated via full atomistic simulation.Our simulations reveal that the CNTs length of the 3D nanotruss plays a significant role on the mechanical properties.This nanotruss network displays orientation dependent deformation behaviour.Under <100> direction tension,negative Poissons ratio is observed exclusively for the case of N = 0,while a flipping behaviour of Poissons ratio with Negative → Positive → Negative appears when the tension is applied along <110> direction.The findings in our work would provide guidance to optimal design of CNT-fullerene based structures towards tailor-made properties.
Single-walled carbon nanotubes Fullerene Nanotruss Negative Poissons ratio Atomistic simulation
Jianyang Wu Jianying He Zhiliang Zhang
Department of Structural Engineering,NTNU Nanomechanical Lab,Norwegian University of Science and Technology(NTNU),Trondheim N-7491,Norway
国际会议
北京
英文
1-8
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）