Metal work-function changes induced by organic adsorbates: A combined experimental and theoretical study

被引：185

作者：

De Renzi, V ^{[1
]}

Rousseau, R

Marchetto, D

Biagi, R

Scandolo, S

del Pennino, U

机构：

[1] Univ Modena & Reggio Emilia, INFM, Ctr Nanostruct & Biosyst Surfaces, Modena, Italy

[2] Univ Modena & Reggio Emilia, Dipartimento Fis, Modena, Italy

[3] Sch Adv Int Studies, I-34014 Trieste, Italy

[4] Abdus Salam Int Ctr Theoret Phys, I-34014 Trieste, Italy

[5] INFM, Democritos Natl Simulat Ctr, I-34014 Trieste, Italy

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.95.046804

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The role of molecular dipole moment, charge transfer, and Pauli repulsion in determining the work-function change (Delta Phi) 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), Delta Phi 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 Delta Phi in the presence of strongly and weakly adsorbed molecules is discussed.

引用

页数：4

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