We show that the population of the rotational degrees of freedom of gas molecules affects their adsorption probability also for a physisorbed state. The effect, expected to be very general, is demonstrated for the case of ethylene interaction with Ag(001), when the physisorption probability is suppressed for molecules produced with a hot nozzle, characterized by a substantially larger average rotational quantum number.
Influence of rotational energy on the adsorption probability for a physisorbed system
VATTUONE, LUCA;VALBUSA, UGO;ROCCA, MARIO AGOSTINO
1999-01-01
Abstract
We show that the population of the rotational degrees of freedom of gas molecules affects their adsorption probability also for a physisorbed state. The effect, expected to be very general, is demonstrated for the case of ethylene interaction with Ag(001), when the physisorption probability is suppressed for molecules produced with a hot nozzle, characterized by a substantially larger average rotational quantum number.
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