Journal
JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA
Volume 126, Issue 1-3, Pages 117-124Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0368-2048(02)00146-9
Keywords
germanium; nanocrystal; nanoparticle; cluster; photoemission; Ge 3D; plasmon; valence band; surface; structural disorder
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Photoemission spectroscopy measurements have been performed on films of individual germanium nanocrystals. The Ge 3d core-level photoemission reveals mainly bulk-like coordinated atoms and structural disorder on the nanocrystal surface. The Ge 3d plasmon excitation exhibits a reduced bulk- and an increased surface-plasmon contribution underlining the importance of the surface region to the overall particle electronic structure. In the Ge nanocrystal valence-band photoemission features similar to amorphous-Ge are found, further indicating structural disorder in the surface region of the nanocrystals. (C) 2002 Elsevier Science B.V. All rights reserved.
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