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Surface Plasmon Resonance-Induced Stiffening of Silver Nanowires #MMPMID26024426
Ben X; Park HS
Sci Rep 2015[]; 5 (ä): ä PMID26024426show ga
We report the results of a computational, atomistic electrodynamics study of the effects of electromagnetic waves on the mechanical properties, and specifically the Young?s modulus of silver nanowires. We find that the Young?s modulus of the nanowires is strongly dependent on the optical excitation energy, with a peak enhancement occurring at the localized surface plasmon resonance frequency. When the nanowire is excited at the plasmon resonance frequency, the Young?s modulus is found to increase linearly with increasing nanowire aspect ratio, with a stiffening of nearly 15% for a 2?nm cross section silver nanowire with an aspect ratio of 3.5. Furthermore, our results suggest that this plasmon resonance-induced stiffening is stronger for larger diameter nanowires for a given aspect ratio. Our study demonstrates a novel approach to actively tailoring and enhancing the mechanical properties of metal nanowires.