TY - JOUR
T1 - Core-level spectroscopy of hydrocarbons adsorbed on si(100)-(2×1)
T2 - A systematic comparison
AU - Fink, A.
AU - Widdra, W.
AU - Wurth, W.
AU - Keller, C.
AU - Stichler, M.
AU - Achleitner, A.
AU - Comelli, G.
AU - Lizzit, S.
AU - Baraldi, A.
AU - Menzel, D.
PY - 2001/7/15
Y1 - 2001/7/15
N2 - 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)-(2×1) surface have been determined by high-resolution x-ray photoemission spectroscopy; results for the clean and the (2×1)-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 1s 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.
AB - 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)-(2×1) surface have been determined by high-resolution x-ray photoemission spectroscopy; results for the clean and the (2×1)-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 1s 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.
UR - http://www.scopus.com/inward/record.url?scp=4243521260&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:4243521260
SN - 0163-1829
VL - 64
SP - 453081
EP - 453089
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 4
M1 - 045308
ER -