Steering in non-dissociative chemisorption: ethylene on Ag(410)

Savio, Letizia; Vattuone, L.; Rocca, M.; Corriol, C.; Darling, George R.; Holloway, S.

doi:10.1016/j.cplett.2003.10.100

Cited by 5 publications

(2 citation statements)

References 21 publications

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“…The absence of an angle dependence of S 0 is explained by the effectiveness of steering which forces the incoming molecules towards the adsorption site: a similar effect is indeed found for Ag(410) and is confirmed by trajectory simulations [22]. The effect is reduced at higher coverage, indicating that steering becomes less effective.…”

Section: Resultssupporting

confidence: 66%

Coverage dependence of the dynamics of ethylene adsorption on Ag(210)

Vattuone

Savio

Rocca

2004

J. Phys.: Condens. Matter

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The sticking probability of C 2 H 4 on Ag (210) is studied by the molecular beam technique and by high resolution electron energy loss spectroscopy. At a crystal temperature of 110 K, adsorption occurs initially into a stable, π-bonded, state. At larger coverage a metastable state is populated, too. The sticking probability, S, decreases with increasing translational energy indicating nonactivated adsorption. At low coverage and for impact angles from −60• to +60• , S is angle independent, decreasing only as soon as the (100) nanofacets start to be shadowed. At higher coverage, in contrast, S depends on the impact angle, decreasing markedly for grazing incidence onto the (100) nanoterraces. The saturation coverage corresponds to quarter occupancy of the available step sites.

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Section: Resultssupporting

confidence: 66%

Coverage dependence of the dynamics of ethylene adsorption on Ag(210)

Vattuone

Savio

Rocca

2004

J. Phys.: Condens. Matter

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“…90 shows the angular dependence of S for C 2 H 4 on Ag(210) (left panels) and Ag(410) (right panels) at 110 K and for two different total (stable and metastable) coverages: Θ = 0 ML (upper panels) and Θ = 0.12 ML (bottom panels). The behaviour of the S(θ ) curves is strongly coverage dependent: while in the low coverage limit S is nearly independent of θ, at 0.12 ML it clearly exhibits maxima at large angles, more evident for Ag (410) [428]. This is indicative that, on the bare surface, steering is effective, causing S 0 to be nearly independent of θ as long as the step rise is exposed.…”

Section: Dissociative Chemisorption: Methane On Stepped Pt and Ni Surmentioning

confidence: 77%