Electron affinity levels of benzene and azabenzenes on Cu(111) and Au(110) revealed by inverse photoemission |
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| Institution: | 1. Department of Physical Therapy, Human Health Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan;2. School of Science for Open and Environmental Systems, Graduate School of Science and Technology, Keio University, Yokohama, Japan;1. University of Freiburg, FMF, Stefan Meier Str. 21, 79104 Freiburg, Germany;2. University of Freiburg, IMTEK,Georges-Koehler-Allee 103, 79110 Freiburg, Germany;1. Department of Electronics and Computer Engineering, Hanyang University, Seoul 04763, Republic of Korea;2. Department of Electronic Engineering, Hanyang University, Seoul 04763, Republic of Korea;1. Department of Materials Science and Engineering, University of Central Florida, Orlando, FL 32816, USA;2. Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL 32816, USA |
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| Abstract: | We have studied the first two unoccupied molecular orbitals of benzene and s-triazine and the three lowest π levels of pyridine and pyrazine adsorbed on Cu(111) and Au(110) using inverse photoemission. We have found a close one-to-one correspondence for the affinity levels in the gas phase and after adsorption onto the metallic substrates with the adsorbates exhibiting a uniform Coulomb relaxation of about 1 eV. While the lowest affinity orbitals of pyridine, pyrazine and s-triazine are observed between 2.2 and 3.7 eV above the Fermi level EF the e2u orbital of benzene has been found at 4.6 eV on Cu(111) and at 4.8 eV on Au(110). |
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