title: Utilizing mechanical strain to mitigate the intrinsic loss mechanisms in oscillating metal nanowires.
abstract: 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.
authors.affiliation: Department of Mechanical Engineering, University of Colorado, Boulder, Colorado 80309, USA.
authors.forename: Sung Youb
authors.initials: SY
authors.lastname: Kim
authors.forename: Harold S
authors.initials: HS
authors.lastname: Park
mesh_terms: D003198:Computer Simulation; D003300:Copper / Q000737:chemistry*; D008956:Models, Chemical; D053770:Nanowires / Q000737:chemistry*; D013314:Stress, Mechanical; D013718:Tensile Strength; D013816:Thermodynamics
chemical_list: D003300:Copper