Abstract
We studied adsorption and desorption of Xe and deuterium on Ni(111) using an optical differential reflectance technique. The main findings are: (i) the differential reflectance varies almost linearly with the surface densities of deuterium and Xe adatoms, and the signals can be described well with a three-layer model and the known dielectric responses of the surface layers: (ii) the adsorption of deuterium at T = 120 K follows the Langmuir kinetics, while the adsorption of Xe at T = 38 K follows the zeroth-order kinetics; (iii) near T = 70 K, the rate of Xe desorption is almost coverage-independent with an activation energy of Edes = 4.4 ± 0.2 kcal/mol. Our analysis suggests that the Xe desorption is likely to be dominated by the escape rate from the corners of two-dimensional Xe islands.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1-8 |
| Number of pages | 8 |
| Journal | Applied Physics A: Materials Science and Processing |
| Volume | 63 |
| Issue number | 1 |
| State | Published - 1996 |
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ASJC Scopus subject areas
- Materials Science(all)
- Physics and Astronomy (miscellaneous)
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An optical differential reflectance study of adsorption and desorption of xenon and deuterium on Ni(111). / Wong, A.; Zhu, X. D.
In: Applied Physics A: Materials Science and Processing, Vol. 63, No. 1, 1996, p. 1-8.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - An optical differential reflectance study of adsorption and desorption of xenon and deuterium on Ni(111)
AU - Wong, A.
AU - Zhu, X. D.
PY - 1996
Y1 - 1996
N2 - We studied adsorption and desorption of Xe and deuterium on Ni(111) using an optical differential reflectance technique. The main findings are: (i) the differential reflectance varies almost linearly with the surface densities of deuterium and Xe adatoms, and the signals can be described well with a three-layer model and the known dielectric responses of the surface layers: (ii) the adsorption of deuterium at T = 120 K follows the Langmuir kinetics, while the adsorption of Xe at T = 38 K follows the zeroth-order kinetics; (iii) near T = 70 K, the rate of Xe desorption is almost coverage-independent with an activation energy of Edes = 4.4 ± 0.2 kcal/mol. Our analysis suggests that the Xe desorption is likely to be dominated by the escape rate from the corners of two-dimensional Xe islands.
AB - We studied adsorption and desorption of Xe and deuterium on Ni(111) using an optical differential reflectance technique. The main findings are: (i) the differential reflectance varies almost linearly with the surface densities of deuterium and Xe adatoms, and the signals can be described well with a three-layer model and the known dielectric responses of the surface layers: (ii) the adsorption of deuterium at T = 120 K follows the Langmuir kinetics, while the adsorption of Xe at T = 38 K follows the zeroth-order kinetics; (iii) near T = 70 K, the rate of Xe desorption is almost coverage-independent with an activation energy of Edes = 4.4 ± 0.2 kcal/mol. Our analysis suggests that the Xe desorption is likely to be dominated by the escape rate from the corners of two-dimensional Xe islands.
UR - http://www.scopus.com/inward/record.url?scp=0030192730&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0030192730&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0030192730
VL - 63
SP - 1
EP - 8
JO - Applied Physics
JF - Applied Physics
SN - 0340-3793
IS - 1
ER -