||Spontaneous Reorientation of Bi-Metal Multilayer Nanowires
||Fei Ma, Shengli Ma, Kewei Xu and Paul K Chu
||Appl. Phys. Lett.
||Multilayered structures are proposed to extend the size range at which metal nanowires can transform spontaneously from one orientation to another due to the interfacial stress. The principle is demonstrated on gold-palladium (Au-Pd) multilayer nanowires by using the molecular dynamic (MD) method and two distinctly different mechanisms are identified for the reorientation which takes place mainly via slipping and twinning at low temperature but by amorphization and recrystallization at high temperature. Our results show that the time response of devices fabricated with the nanostructures is consequently affected.