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Title: High-Resolution Core Level Photoemission of Mg:Ag Deposited on Tris(8-hydroxyquinolato) Aluminum Probed by Synchrotron Radiation

Abstract

Deposition of magnesium on tris(8-hydroxyquinolato) aluminum (Alq3) precovered with a thin silver dopant was investigated with high-resolution core-level photoemission via synchrotron radiation. First, the noble-metal dopant that make contact with the molecules reside at the vicinity of the pyridyl ring, similar to the case of the alkaline earth metals on Alq3. Further, a fit to this Alq3-derived Ag component delivers a non-zero Doniach-Sunjic singularity index of 0.061, suggesting that the incorporated Ag dopant behaves as a metallic cluster. Upon Mg adsorption on the Ag/Alq3 surface, the size of the Ag cluster remains intact, but its binding energy now appears lower than that of the bulk. The charge added onto the clusters comes from part of Mg which is mixed with Ag. As to the other part of the Mg atoms, they gather about the chelated oxygen. This is certainly in contrast to the case of Mg on Alq3 where Mg accumulates at the vicinity of the nitrogen atoms.

Authors:
 [1]; ; ;  [2]
  1. National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan (China)
  2. Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan (China)
Publication Date:
OSTI Identifier:
21049324
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 879; Journal Issue: 1; Conference: 9. international conference on synchrotron radiation instrumentation, Daegu (Korea, Republic of), 28 May - 2 Jun 2006; Other Information: DOI: 10.1063/1.2436369; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ADSORPTION; ALUMINIUM; ALUMINIUM COMPOUNDS; BINDING ENERGY; DEPOSITION; INTERFACES; MAGNESIUM; MOLECULES; NITROGEN; ORGANIC COMPOUNDS; OXYGEN; PHOTOEMISSION; RESOLUTION; SILVER; SURFACES; SYNCHROTRON RADIATION

Citation Formats

Pi, T.-W., Lin, H.-H., Lee, H.-H., and Hwang, J.. High-Resolution Core Level Photoemission of Mg:Ag Deposited on Tris(8-hydroxyquinolato) Aluminum Probed by Synchrotron Radiation. United States: N. p., 2007. Web. doi:10.1063/1.2436369.
Pi, T.-W., Lin, H.-H., Lee, H.-H., & Hwang, J.. High-Resolution Core Level Photoemission of Mg:Ag Deposited on Tris(8-hydroxyquinolato) Aluminum Probed by Synchrotron Radiation. United States. doi:10.1063/1.2436369.
Pi, T.-W., Lin, H.-H., Lee, H.-H., and Hwang, J.. Fri . "High-Resolution Core Level Photoemission of Mg:Ag Deposited on Tris(8-hydroxyquinolato) Aluminum Probed by Synchrotron Radiation". United States. doi:10.1063/1.2436369.
@article{osti_21049324,
title = {High-Resolution Core Level Photoemission of Mg:Ag Deposited on Tris(8-hydroxyquinolato) Aluminum Probed by Synchrotron Radiation},
author = {Pi, T.-W. and Lin, H.-H. and Lee, H.-H. and Hwang, J.},
abstractNote = {Deposition of magnesium on tris(8-hydroxyquinolato) aluminum (Alq3) precovered with a thin silver dopant was investigated with high-resolution core-level photoemission via synchrotron radiation. First, the noble-metal dopant that make contact with the molecules reside at the vicinity of the pyridyl ring, similar to the case of the alkaline earth metals on Alq3. Further, a fit to this Alq3-derived Ag component delivers a non-zero Doniach-Sunjic singularity index of 0.061, suggesting that the incorporated Ag dopant behaves as a metallic cluster. Upon Mg adsorption on the Ag/Alq3 surface, the size of the Ag cluster remains intact, but its binding energy now appears lower than that of the bulk. The charge added onto the clusters comes from part of Mg which is mixed with Ag. As to the other part of the Mg atoms, they gather about the chelated oxygen. This is certainly in contrast to the case of Mg on Alq3 where Mg accumulates at the vicinity of the nitrogen atoms.},
doi = {10.1063/1.2436369},
journal = {AIP Conference Proceedings},
number = 1,
volume = 879,
place = {United States},
year = {Fri Jan 19 00:00:00 EST 2007},
month = {Fri Jan 19 00:00:00 EST 2007}
}