Open AccessUtilizing Mechanical Strain to Mitigate the Intrinsic Loss Mechanisms in Oscillating Metal Nanowires
Author(s) -
Sung Youb Kim,
Harold S. Park
Publication year - 2008
Publication title -
physical review letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.688
H-Index - 673
eISSN - 1079-7114
pISSN - 0031-9007
DOI - 10.1103/physrevlett.101.215502
Subject(s) - nanowire , materials science , dissipation , strain (injury) , tensile strain , thermal , range (aeronautics) , condensed matter physics , surface area to volume ratio , metal , aspect ratio (aeronautics) , surface (topology) , copper , atmospheric temperature range , molecular dynamics , volume (thermodynamics) , ultimate tensile strength , nanotechnology , composite material , thermodynamics , physics , quantum mechanics , medicine , geometry , mathematics , metallurgy
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.open26
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