Figure 1
From: Water filling and electric field-induced enhancement in the mechanical property of carbon nanotubes

The stress-strain relationships.
(a) the empty CNTs, (b) the water-filled CNTs and (c) the water-filled CNTs under the axial electric field with the intensity of 0.5 V/Å. The insets are the final buckling modes of the (8, 8) and (16, 16) CNTs. The color in the CNTs represents the distribution of the strain energy (eV) under the strain of about 23%.