TY  - JOUR
AU  - Henze, S. K. M.
AU  - Bauer, O.
AU  - Lee, T.L.
AU  - Sokolowski, M.
AU  - Tautz, F. S.
TI  - Vertical bonding distances of PTCDA on Au(111) and Ag(111): Relation to the bonding type
JO  - Surface science
VL  - 601
SN  - 0039-6028
CY  - Amsterdam
PB  - Elsevier
M1  - PreJuSER-60717
SP  - 1566 - 1573
PY  - 2007
N1  - Record converted from VDB: 12.11.2012
AB  - The vertical bonding distance of 3,4,9,10-perylene-tetracarboxylic-dianhydride (PTCDA) above the Au(111) surface has been measured by the normal incidence X-ray standing wave (NIXSW) technique. The carbon skeleton of PTCDA has a vertical distance of D = (3.27 +/- 0.02) angstrom to the Au(111) substrate. This distance corresponds very nearly to the sum of the van der Waals radii of carbon and gold, suggesting the adsorption to be a physisorptive one. In contrast, the PTCDA/Ag(111) interface which according to spectroscopic data follows the standard model of chemisorption very closely, shows a considerably smaller bonding distance of D = (2.86 +/- 0.01) angstrom [A. Hauschild, K. Karki, B.C.C. Cowie, M. Rolilting, F.S. Tautz, M. Sokolowski, Phys. Rev. Lett. 94 (2005) 036106, comment: Rurali et al., Phys. Lett. 95 (2005) 209205, reply: Phys. Rev. Lett. 95 (2005) 209206]. The different vertical adsorption heights of PTCDA on gold and silver are discussed in relation to the different bonding mechanisms on both noble metal surfaces. (c) 2007 Elsevier B.V. All rights reserved.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000245616400019
DO  - DOI:10.1016/j.susc.2007.01.020
UR  - https://juser.fz-juelich.de/record/60717
ER  -