  A simple model for evaluating the thermal atomic transfer rates in
nanosystems [EPL 94, 40002 (2011)] was developed to predict the chemical
reaction rates of nanosystems with small gas molecules. The accuracy of the
model was verified by MD simulations for molecular adsorption and desorption on
a monatomic chain. By the prediction, a monatomic carbon chain should survive
for 120 years in the ambient of 1 atm O2 at room temperature, and it is very
invulnerable to N2, H2O, NO2, CO and CO2, while a monatomic gold chain quickly
ruptures in vacuum. It is worth noting that since the model can be easily
applied via common ab initio calculations, it could be widely used in the
prediction of chemical stability of nanosystems.
