Figure 2.

Schematic of the DWCNT model subjected to axial pressure for analysis. The left image displays the latitudinal cross-section, which shows the vdW force between the inner and outer tubes. The right image displays the longitudinal cross-section, which shows the axial pressure acting on both ends of the DWCNT.

Lei et al. Nanoscale Research Letters 2011 6:492   doi:10.1186/1556-276X-6-492
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