Variation of radial elasticity in multiwalled carbon nanotubes

被引：23

作者：

Muthaswami, Lata ^{[1
]}

Zheng, Yuegul ^{[1
]}

Vajtai, Robert ^{[2
]}

Shehkawat, G. ^{[1
]}

Ajayan, Pulickel ^{[3
]}

Geer, Robert E. ^{[1
]}

机构：

[1] SUNY Albany, Coll Nanoscale Sci & Engn, Albany, NY 12203 USA

[2] Rensselaer Nanotechnol Ctr, Rensselaer Polytech Inst, Troy, NY 12180 USA

[3] Rensselaer Nanotechnol Ctr, Dept Mat Sci & Engn, Troy, NY 12180 USA

来源：

NANO LETTERS | 2007年 / 7卷 / 12期

关键词：

D O I：

10.1021/nl072002o

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Correlations between the local diameter and local radial elastic modulus in multiwalled carbon nanotubes (MWNTs) were investigated via ultrasonic force microscopy. Spatial cross-correlation analysis showed that local radial modulus variations were inversely correlated with local diameter gradients ("bamboo" structures) in MWNTs grown via chemical vapor deposition (CVD). In contrast, uniform MWNTs grown via arc discharge exhibited no such correlation, indicating that reductions of elastic modulus previously reported for CVD-grown MWNTs originated from increased defect density associated with local increases in diameter.

引用

页码：3891 / 3894

页数：4

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