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Nitrogen substitution impacts organic-metal interface energetics
DOI:
10.1103/PhysRevB.94.155426
Authors:
Ao
Yang
(Institute of Functional Nano and Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-Based Functional Materials)
,
Antoni
Franco Canellas
(University of Tuebingen)
,
Mikio
Sato
(3Department of Physics, Faculty of Science and Technology, Tokyo University of Science)
,
Bin
Wang
,
Rong-bin
Wang
(Soochow University; Institut für Physik, Humboldt-Universität zu Berlin)
,
Harunobu
Koike
(Department of Physics, Faculty of Science and Technology, Tokyo University of Science)
,
Ingo
Salzmann
(Institut für Physik, Humboldt-Universität zu Berlin)
,
Pardeep
Kumar Thakur
(Diamond Light Source)
,
Tien-lin
Lee
(Diamond Light Source)
,
Lijia
Liu
(Soochow University)
,
Satoshi
Kera
(Institute for molecular science)
,
Alexander
Gerlach
(University of Tuebingen)
,
Kaname
Kanai
(Department of Physics, Faculty of Science and Technology, Tokyo University of Science)
,
Jian
Fan
(Institute of Functional Nano and Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University)
,
Frank
Schreiber
(University of Tuebingen)
,
Steffen
Duhm
(Soochow University)
Co-authored by industrial partner:
No
Type:
Journal Paper
Journal:
Physical Review B
, VOL 94
State:
Published (Approved)
Published:
October 2016
Diamond Proposal Number(s):
9523
Abstract: We investigated the structural and electronic properties of vacuum sublimed 7,8,15,16-tetraazaterrylene (TAT) thin films on Au(111), Ag(111), and Cu(111) substrates using inverse photoemission spectroscopy, ultraviolet photoelectron spectroscopy (UPS), x-ray photoelectron spectroscopy (XPS), low energy electron diffraction (LEED), and the x-ray standing wave (XSW) technique. The LEED reveals a flat adsorption geometry of the monolayer TAT on these three substrates, which is in accordance with the XSW results. The molecules are slightly distorted in monolayers on all three substrates with the nitrogen atoms having smaller averaged bonding distances than the carbon atoms. On Ag(111) and Cu(111), chemisorption with a net electron transfer from the substrate to the adsorbate takes place, as evidenced by UPS and XPS. Combining these results, we gain full insight into the correlation between electronic properties and interface geometry.
Journal Keywords: XSW, metal single crystals, UPS, charge transfer, adsorption geometry
Subject Areas:
Physics,
Chemistry,
Materials
Instruments:
I09-Surface and Interface Structural Analysis
Other Facilities: BESSY II