中国物理B ›› 2015, Vol. 24 ›› Issue (1): 16202-016202.doi: 10.1088/1674-1056/24/1/016202
• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇 下一篇
王钢a b, 陈闽江a b, 余芳a b, 薛磊江c, 邓娅a b, 张键a b, 齐笑迎a, 高燕a, 褚卫国a, 刘广同d, 杨海方d, 顾长志d, 孙连峰a
Wang Gang (王钢)a b, Chen Min-Jiang (陈闽江)a b, Yu Fang (余芳)a b, Xue Lei-Jiang (薛磊江)c, Deng Ya (邓娅)a b, Zhang Jian (张键)a b, Qi Xiao-Ying (齐笑迎)a, Gao Yan (高燕)a, Chu Wei-Guo (褚卫国)a, Liu Guang-Tong (刘广同)d, Yang Hai-Fang (杨海方)d, Gu Chang-Zhi (顾长志)d, Sun Lian-Feng (孙连峰)a
摘要:
The attractions of cantilevers made of multiwalled carbon nanotubes (MWNTs) and secured on one end are studied in the non-uniform magnetic field of a permanent magnet. Under an optical microscope, the positions and the corresponding deflections of the original cantilevers (with iron catalytic nanoparticles at the free end) and corresponding cut-off cantilevers (the free ends consisting of open ends of MWNTs) are studied. Both kinds of CNT cantilevers are found to be attracted by the magnet, and the point of application of force is proven to be at the tip of the cantilever. By measuring and comparing deflections between these two kinds of cantilevers, the magnetic moment at the open ends of the CNTs can be quantified. Due to the unexpectedly high value of the magnetic moment at the open ends of carbon nanotubes, it is called giant magnetic moment, and its possible mechanisms are proposed and discussed.
中图分类号: (Mechanical properties of solids)