Core-level spectroscopy of hydrocarbons adsorbed on Si(100)-(2X1): A systematic comparison

被引：44

作者：

Fink, A

Widdra, W ^{[1
]}

Wurth, W

Keller, C

Stichler, M

Achleitner, A

Comelli, G

Lizzit, S

Baraldi, A

Menzel, D

机构：

[1] Tech Univ Munich, Phys Dept E20, D-85747 Garching, Germany

[2] TASC INFM Lab, I-34012 Trieste, Italy

[3] Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy

[4] ELETTRA, Sincrotrone Trieste, I-34012 Trieste, Italy

来源：

PHYSICAL REVIEW B | 2001年 / 64卷 / 04期

关键词：

D O I：

10.1103/PhysRevB.64.045308

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Adsorbate and substrate core-level binding energies for adsorption layers of six unsaturated hydrocarbons (C2H2. C2H4, C3H4, C4H6, C6D6 (C6H6), and 1,2-C2H2Cl2) on the Si(100)-(2x1) surface have been determined by high-resolution x-ray photoemission spectroscopy; results for the clean and the (2x1)-H covered surface have been obtained for comparison. Remarkable differences in the Si 2p and C 1s surface core-level shifts for the various adsorbates are found. which range from 327 to -169 meV and from 1220 to -260 meV, respectively. Both initial- and final-state effects are necessary to explain the strong but unsystematic variations of the observed shifts. Additionally, from a comparison of the C Is intensities the absolute saturation coverages are determined to be 0.87, 0.84, 1.15, 0.79, 0.36. and 0.44 molecules per unit cell of the clean surface for C2H2, C2H4, C3H4, C4H6, C6D6, and 1,2-C2H2Cl2, respectively.

引用

页数：9

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