Surface-Stress-Driven Pseudoelasticity and Shape Memory Effect at the Nanoscale
Summary Atomistic simulations have also yielded the same rubber-like behavior and SME in Au nanowires with similar levels of recoverable strains and different critical temperatures and critical sizes. Since other FCC metallic (e.g., Pt and Ag) nanowires have similar structures and properties as those of Cu and Au nanowires (Rodrigues and Ugarte [3]), it is tempting to speculate that a similar behavior may also be found in them, with comparable levels of recoverable strains as those for Cu and Au wires. Of course, their critical temperatures and critical sizes would depend on their surface stress levels and the differences between their {001} and {111} surface energies. If such an effect is proven true, these materials could provide a whole class of nano building-blocks with unique rubber-like behaviors and SMEs operative over a wide range of temperatures and sizes. |