Kang, H. C. and Mullins, C. B. and Weinberg, W. H. (1990) Kinetics of physical adsorption of ethane on Ir(110)-(1×2): Molecular beam reflectivity measurements and Monte Carlo simulations. Journal of Vacuum Science and Technology A, 8 (3). pp. 2538-2542. ISSN 0734-2101 http://resolver.caltech.edu/CaltechAUTHORS:KANjvsta90
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Experimental results, obtained using a reflectivity method, for the probability of physical adsorption of ethane on the Ir(110)-(1×2) surface are presented. We analyze these results using Monte Carlo simulations and show that physical adsorption can occur either directly or through a precursor state in which an ethane molecule is trapped in a second layer above a first layer of physically adsorbed ethane. From the Monte Carlo simulations, we are able to establish that the energy barrier for desorption of an ethane molecule from the precursor state is ~4.5 kcal/mol. We also find that the energy barrier for diffusion of an ethane molecule on top of a monolayer of physically adsorbed ethane on the Ir(110) surface is ~3.7 kcal/mol.
|Additional Information:||© 1990 American Vacuum Society (Received 25 August 1989; accepted 18 September 1989) This research was supported by the National Science Foundation under Grant No. CHE-8617826. Acknowledgement is also made to the Donors of the Petroleum Research Fund of the American Chemical Society for partial support of this research under Grant No. PRF 19819-AC5-C. [C.B.M. was an] IBM Predoctoral Fellow.|
|Subject Keywords:||ETHANE; ADSORPTION; IRIDIUM; SORPTIVE PROPERTIES; MONTE CARLO METHOD; DESORPTION; LOW TEMPERATURE; MOLECULAR BEAMS|
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|Deposited On:||11 Sep 2006|
|Last Modified:||26 Dec 2012 09:02|
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