Utilizing Mechanical Strain to Mitigate the Intrinsic Loss Mechanisms in Oscillating Metal Nanowires
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- Utilizing Mechanical Strain to Mitigate the Intrinsic Loss Mechanisms in Oscillating Metal Nanowires
- Kim, Sung Youb; Park, Harold S.
- NANOELECTROMECHANICAL SYSTEMS; SILICON CANTILEVERS; FORCE
- Issue Date
- AMER PHYSICAL SOC
- PHYSICAL REVIEW LETTERS, v.101, no.21, pp.215502 -
- 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/T0.70 dependence on the temperature T that is independent of strain.
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