  Black phosphorene is not stable at ambient conditions, so atomic defects and
oxidation effects are unavoidable in black phosphorus samples in the
experiment. The effects of these defects on the performance of the black
phosphorus nanoresonators are still unclear. Here, we perform classical
molecular dynamics to investigate the effects of the vacancy and oxidation on
single-layer black phosphorus nanoresonators at different temperatures. We find
that the vacancy causes strong reduction in the quality factor of the
nanoresonators, while the oxidation has weaker effect on the nanoresonators.
More specifically, a 2% concentration of randomly distributed single vacancies
is able to reduce the quality factor by about 80% and 40% at 4.2K and 50K,
respectively. We also find that the quality factor of the nanoresonator is not
sensitive to the distribution pattern of the vacancy defects.
