Height Independent Compressive Modulus of Vertically Aligned Carbon Nanotube Arrays
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- 作者：Tao Tong ; Yang Zhao ; Lance Delzeit ; Ali Kashani ; M. Meyyappan ; Arun Majumdar
- 刊名：Nano Letters
- 出版年：2008
- 出版时间：February 2008
- 年：2008
- 卷：8
- 期：2
- 页码：511 - 515
- 全文大小：380K
- 年卷期：v.8,no.2(February 2008)
- ISSN：1530-6992
文摘
The compressive modulus of dense vertically aligned multiwalled carbon nanotube (CNT) arrays synthesized by chemical vapor depositionwas investigated using an optically probed precision-loading platform. For CNT arrays with heights ranging from 15 to 500 
m, the moduliwere measured to be about 0.25 MPa and were found to be independent of array height. A continuum mechanics model based on multimodebuckling guided by the wavy features of CNT arrays is derived and explains well the measured compressive properties. The measured compressivemodulus of the CNT arrays also satisfies the "Dahlquist tack criterion" for pressure sensitive adhesives, which was previously observed forthese vertically aligned CNT arrays (Zhao, Y., et al. J. Vac. Sci. Technol., B 2006, 24, 331-335).
m, the moduliwere measured to be about 0.25 MPa and were found to be independent of array height. A continuum mechanics model based on multimodebuckling guided by the wavy features of CNT arrays is derived and explains well the measured compressive properties. The measured compressivemodulus of the CNT arrays also satisfies the "Dahlquist tack criterion" for pressure sensitive adhesives, which was previously observed forthese vertically aligned CNT arrays (Zhao, Y., et al. J. Vac. Sci. Technol., B 2006, 24, 331-335).