Detecting the electrical conductivity of single walled carbon nano-tubes by a DFM detection system

Rare SWCNT materials contain both metallic SWCNT （m-SWCNT） and semi-conducting SWCNT（s-SWCNT）. Since m- SWCNT and s-SWCNT have very different applications, it is necessary to differentiate them so as to further separate them for more efficient CNT utilization. To achieve this goal, the authors estab...

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Bibliographic Details
Published in:Science China. Technological sciences 2014, Vol.57 (1), p.49-54
Main Authors: Zhao, ZengXu, Tian, XiaoJun, Liu, Jie, Dong, ZaiLi, Wang, YueChao
Format: Article
Language:English
Subjects:
Carbon
China
DFM
Dielectrics
Electrical resistivity
Engineering
Resistivity
Semiconductors
Single wall carbon nanotubes
Statistics
交流电场
单壁碳纳米管
探测
检测系统
电导率
碳纳米管材料
统计分析
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Summary:Rare SWCNT materials contain both metallic SWCNT （m-SWCNT） and semi-conducting SWCNT（s-SWCNT）. Since m- SWCNT and s-SWCNT have very different applications, it is necessary to differentiate them so as to further separate them for more efficient CNT utilization. To achieve this goal, the authors established a dielectric force microscope （DFM） detection system to differentiate s-SWCNT from m-SWCNT, based on different 2c~ force decided by SWCNT＇s conductivity under AC electric field. The experimental results showed that s-SWCNT can be clearly differentiated from m-SWCNT. The statistics analysis shows that the detected number proportion of s-SWCNT to m-SWCNT matches the well-known proportion 2：1 in the normally prepared CNT materials. The above results strongly verified the effectiveness of the detection system.
ISSN:1674-7321
1869-1900
DOI:10.1007/s11431-013-5412-1