Utilizing mechanical strain to mitigate the intrinsic loss mechanisms in oscillating metal nanowires.
We utilize classical molecular dynamics to study energy dissipation (the Q factors) of doubly clamped copper nanowire nanoresonators undergoing flexural oscillations. We find that the application of tensile strain effectively mitigates both the intrinsic surface and thermal losses, with improvements in Q by a factor of 3-10 across a range of operating temperatures. We also find that the nanowire Q factors are not dependent on the surface area to volume ratio, but instead their aspect ratio, and that the Q factors exhibit a 1/T(0.70) dependence on the temperature T that is independent of strain.
Kim
Sung Youb
SY
Department of Mechanical Engineering, University of Colorado, Boulder, Colorado 80309, USA.
Park
Harold S
HS
D003198:Computer Simulation; D003300:Copper / Q000737:chemistry*; D008956:Models, Chemical; D053770:Nanowires / Q000737:chemistry*; D013314:Stress, Mechanical; D013718:Tensile Strength; D013816:Thermodynamics
D003300:Copper