Large magnetic moment at sheared ends of single-walled carbon nanotubes<xref rid="cpb_27_12_128101fn1" ref-type="fn">*</xref><fn id="cpb_27_12_128101fn1"><label>*</label><p>Project supported by the National Key Research and Development Program of China (Grant Nos. 2018YFA0208403 and 2016YFA0200403), the National Natural Science Foundation of China (Grant Nos. 51472057, 11874129, 91323304, and 11674387), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDA09040101), and the Baotou Rare Earth Research and Development Centre, Chinese Academy of Sciences (Grant No. GZR 2018001).</p></fn>

Large magnetic moment at sheared ends of single-walled carbon nanotubes**

Project supported by the National Key Research and Development Program of China (Grant Nos. 2018YFA0208403 and 2016YFA0200403), the National Natural Science Foundation of China (Grant Nos. 51472057, 11874129, 91323304, and 11674387), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDA09040101), and the Baotou Rare Earth Research and Development Centre, Chinese Academy of Sciences (Grant No. GZR 2018001).

Zhang Jian^{1, 4}, Deng Ya^{1, 4}, Hao Ting-Ting², Hu Xiao^{1, 4}, Liu Ya-Yun^{1, 4}, Peng Zhi-Sheng³, Nshimiyimana Jean Pierre^{1, 4}, Chi Xian-Nian^{1, 4}, Wu Pei^{1, 4}, Liu Si-Yu³, Zhang Zhong¹, Li Jun-Jie², Wang Gong-Tang^{3, ‡}, Chu Wei-Guo^{1, §}, Gu Chang-Zhi², Sun Lian-Feng^{1, ¶}

Preparing and shearing of SWNTs samples. (a) Typical optical image of a pristine, purified SWNTs (∼ 3 mg) in centrifuge tube with ethanol as solvent. (b) Optical image of SWNTs in centrifuge tube after being treated by shearing. Although sample weight remains the same, solutions look different, suggesting that SWNTs bundles have smaller dimensions after being treated. (c) Typical SEM image of pristine, purified SWNTs, showing that SWNTs are in the form of bundles. Diameter and length of SWNT bundles each have quite a wide distribution. (d) SEM image of SWNTs after being treated by shearing. SWNTs have become smaller pieces, which still show wide size distribution. Arrows indicate shearing plane of SWNT bundles. (e) SEM image of SWNT bundle with diameter about 4 μm. Shearing plane is neat, straight and perpendicular to SWNT bundle as shown by arrow.