TY - JOUR
T1 - Metal work-function changes induced by organic adsorbates
T2 - A combined experimental and theoretical study
AU - De Renzi, V.
AU - Rousseau, R.
AU - Marchetto, D.
AU - Biagi, R.
AU - Scandolo, S.
AU - Del Pennino, U.
PY - 2005/7/22
Y1 - 2005/7/22
N2 - The role of molecular dipole moment, charge transfer, and Pauli repulsion in determining the work-function change (ΔΦ) at organic-metal interfaces has been elucidated by a combined experimental and theoretical study of (CH3S)2/Au(111) and CH3S/Au(111). Comparison between experiment and theory allows us to determine the origin of the interface dipole layer for both phases. For CH3S/Au(111), ΔΦ can be ascribed almost entirely to the dipole moment of the CH3S layer. For (CH3S)2/Au(111), a Pauli repulsion mechanism occurs. The implications of these results on the interpretation of ΔΦ in the presence of strongly and weakly adsorbed molecules is discussed.
AB - The role of molecular dipole moment, charge transfer, and Pauli repulsion in determining the work-function change (ΔΦ) at organic-metal interfaces has been elucidated by a combined experimental and theoretical study of (CH3S)2/Au(111) and CH3S/Au(111). Comparison between experiment and theory allows us to determine the origin of the interface dipole layer for both phases. For CH3S/Au(111), ΔΦ can be ascribed almost entirely to the dipole moment of the CH3S layer. For (CH3S)2/Au(111), a Pauli repulsion mechanism occurs. The implications of these results on the interpretation of ΔΦ in the presence of strongly and weakly adsorbed molecules is discussed.
UR - http://www.scopus.com/inward/record.url?scp=27144475250&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.95.046804
DO - 10.1103/PhysRevLett.95.046804
M3 - Article
AN - SCOPUS:27144475250
SN - 0031-9007
VL - 95
JO - Physical Review Letters
JF - Physical Review Letters
IS - 4
M1 - 046804
ER -