A comparison of the chemisorption behaviour of PTCDA on different Ag surfaces

被引：44
作者：
Tautz, FS
Eremtchenko, M
Schaefer, JA
Sokolowski, M
Shklover, V
Glöckler, K
Umbach, E
机构：
[1] Int Univ Bremen, Sch Sci & Engn, D-28725 Bremen, Germany
[2] Tech Univ Ilmenau, Inst Phys, D-98684 Ilmenau, Germany
[3] Univ Wurzburg, D-97074 Wurzburg, Germany
[4] Univ Bonn, Inst Phys & Theoret Chem, D-53115 Bonn, Germany
来源：
SURFACE SCIENCE | 2002年 / 502卷
关键词：
electron energy loss spectroscopy (EELS); scanning tunneling microscopy; chemisorption; vibrations of adsorbed molecules; surface electronic phenomena (work function; surface potential; surface states; etc); silver; alkali metals; metal-semiconductor interfaces;
D O I：
10.1016/S0039-6028(01)01930-6
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We have studied the adsorption of the molecular semiconductor 3,4,9 10-perylene-tetracarboxylic-acid-dianhydride (PTCDA) oil a range of silver substrates. including A a(l 0 01), Ag(l 10), Ag(l 1 1). and Ag(7 7 5). In all of these cases, special attention was placed upon the chemical bonding between the organic molecule and the metal surface, as this is of fundamental importance for the understanding of the organic-inorganic interface. We demonstrate that high resolution electron energy loss spectroscopy (HREELS) in the vibrational energy range is able to provide detailed insight into the intricacies of molecular chemisorption. including electron-vibron coupling effects. Specifically, by analogy with potassium-doped thin films of PTCDA we prove that the Ag(l 1 1) surface imparts metallicity to PTCDA monolayers. (C) 2002 Published by Elsevier Science B.V.
引用
收藏
页码：176 / 184
页数：9
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