We have studied the interface formation between cyclopentene and (2x4) reconstructed InP (001) surfaces by soft x-ray photoemission spectroscopy, reflectance anisotropy spectroscopy (RAS), and ab initio theory. After preparation of an uncontaminated (2 x 4) reconstruction under ultrahigh vacuum conditions, the surface was exposed to cyclopentene as monitored by RAS. The changes in the In 4d, P 2p, and C 1s core-level emission lines upon molecule adsorption indicate a covalent bonding of cyclopentene to the topmost atoms of the surface at two different bonding sites. Based on these results, a structure model is suggested, which is supported by ab initio calculations of the total-energy, the RAS signature, and the In 4d and P 2p core-level shifts. Our results suggest that the cyclopentene adsorption is a two-step process: first cyclopentene adsorbs on the "mixed dimer" and second the changes in the surface structure enable the additional adsorption on the second layer In-In surface bond.

Passmann, R., Favero, P., Schmidt, W., Miotto, R., Braun, W., Richter, W., et al. (2009). Adsorption structure of cyclopentene on InP(001)(2x4). PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 80(12) [10.1103/PhysRevB.80.125303].

Adsorption structure of cyclopentene on InP(001)(2x4)

RICHTER, WOLFGANG;
2009-01-01

Abstract

We have studied the interface formation between cyclopentene and (2x4) reconstructed InP (001) surfaces by soft x-ray photoemission spectroscopy, reflectance anisotropy spectroscopy (RAS), and ab initio theory. After preparation of an uncontaminated (2 x 4) reconstruction under ultrahigh vacuum conditions, the surface was exposed to cyclopentene as monitored by RAS. The changes in the In 4d, P 2p, and C 1s core-level emission lines upon molecule adsorption indicate a covalent bonding of cyclopentene to the topmost atoms of the surface at two different bonding sites. Based on these results, a structure model is suggested, which is supported by ab initio calculations of the total-energy, the RAS signature, and the In 4d and P 2p core-level shifts. Our results suggest that the cyclopentene adsorption is a two-step process: first cyclopentene adsorbs on the "mixed dimer" and second the changes in the surface structure enable the additional adsorption on the second layer In-In surface bond.
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore FIS/03 - Fisica della Materia
English
AUGMENTED-WAVE METHOD; ATOMIC-STRUCTURE; TEMPERATURE-DEPENDENCE; ELECTRONIC-STRUCTURE; GAAS(001) SURFACES; ORGANIC MONOLAYERS; SI(001) SURFACE; SEMICONDUCTORS; SPECTROSCOPY; ANISOTROPY
7
Passmann, R., Favero, P., Schmidt, W., Miotto, R., Braun, W., Richter, W., et al. (2009). Adsorption structure of cyclopentene on InP(001)(2x4). PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 80(12) [10.1103/PhysRevB.80.125303].
Passmann, R; Favero, P; Schmidt, W; Miotto, R; Braun, W; Richter, W; Kneissl, M; Esser, N; Vogt, P
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/57487
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