Giant magnetic moment at open ends of multiwalled carbon nanotubes

doi:10.1088/1674-1056/24/1/016202

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

Giant magnetic moment at open ends of multiwalled carbon nanotubes

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

a National Centre for Nanoscience and Technology, Beijing 100190, China;
b University of Chinese Academy of Sciences, Beijing 100049, China;
c College of Computer Science and Technology, Shandong University of Technology, Zibo 255049, China;
d Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

收稿日期:2014-10-14 修回日期:2014-11-06 出版日期:2015-01-05 发布日期:2015-01-05
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10774032 and 51472057) and the Instrument Developing Project of the Chinese Academy of Sciences (Grant No. Y2010031).

Giant magnetic moment at open ends of multiwalled carbon nanotubes

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

a National Centre for Nanoscience and Technology, Beijing 100190, China;
b University of Chinese Academy of Sciences, Beijing 100049, China;
c College of Computer Science and Technology, Shandong University of Technology, Zibo 255049, China;
d Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

Received:2014-10-14 Revised:2014-11-06 Online:2015-01-05 Published:2015-01-05
Contact: Chu Wei-Guo, Sun Lian-Feng E-mail:wgchu@nanoctr.cn;slf@nanoctr.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10774032 and 51472057) and the Instrument Developing Project of the Chinese Academy of Sciences (Grant No. Y2010031).

摘要/Abstract

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.

关键词: carbon nanotubes, open ends, giant magnetic moment

Abstract:

Key words: carbon nanotubes, open ends, giant magnetic moment

中图分类号: (Mechanical properties of solids)

62.20.-x

68.35.Gy (Mechanical properties; surface strains) 75.50.Dd (Nonmetallic ferromagnetic materials)

王钢, 陈闽江, 余芳, 薛磊江, 邓娅, 张键, 齐笑迎, 高燕, 褚卫国, 刘广同, 杨海方, 顾长志, 孙连峰. Giant magnetic moment at open ends of multiwalled carbon nanotubes[J]. 中国物理B, 2015, 24(1): 16202-016202.

Wang Gang (王钢), Chen Min-Jiang (陈闽江), Yu Fang (余芳), Xue Lei-Jiang (薛磊江), Deng Ya (邓娅), Zhang Jian (张键), Qi Xiao-Ying (齐笑迎), Gao Yan (高燕), Chu Wei-Guo (褚卫国), Liu Guang-Tong (刘广同), Yang Hai-Fang (杨海方), Gu Chang-Zhi (顾长志), Sun Lian-Feng (孙连峰). Giant magnetic moment at open ends of multiwalled carbon nanotubes[J]. Chin. Phys. B, 2015, 24(1): 16202-016202.

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Giant magnetic moment at open ends of multiwalled carbon nanotubes

Giant magnetic moment at open ends of multiwalled carbon nanotubes

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