The benefits of stress: Prestressed multi-walled carbon nanotubes (PMWNTs; see picture) have smaller interwall spacings than normal multi-walled nanotubes (MWNTs) and significantly enhanced mechanical properties. Molecular simulations show that a 20% reduction in interwall spacing increases the interwall shear strength by up to four orders of magnitude. The PMWNTs have a tensile strength and stiffness about 20% higher than those of normal MWNTs.
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Xu et al. (2008) studied this question.
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