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Differential charging in SiO2/Si system as determined by XPS
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Date
2004-01-29
Author
Karadas, F
Ertaş, Gülay
Suzer, S
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The Si2p binding and the Si-KLL kinetic energy difference between the SiO2 layer and Si substrate is shown to be influenced by application of external voltage bias to the sample holder due to the differential charging as was already reported earlier (Ulgut, B.; Suzer, S. J. Phys. Chem. B 2003, 107, 2939). The cause of this bias induced (physical)-shift is now proven to be mostly due to partial neutralization by the stray electrons within the vacuum system by (i) introducing additional stray electrons via a filament and following their influence on the measured binding energy as a function of the applied voltage, (ii) measuring the Auger parameter. It is also shown that citrate-capped gold nanoclusters deposited on the SiO2/Si system experience differential charging similar to that of the oxide layer rather than the silicon substrate.
Subject Keywords
Physical and Theoretical Chemistry
,
Materials Chemistry
,
Surfaces, Coatings and Films
URI
https://hdl.handle.net/11511/36096
Journal
JOURNAL OF PHYSICAL CHEMISTRY B
DOI
https://doi.org/10.1021/jp035498g
Collections
Department of Chemistry, Article
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F. Karadas, G. Ertaş, and S. Suzer, “Differential charging in SiO2/Si system as determined by XPS,”
JOURNAL OF PHYSICAL CHEMISTRY B
, pp. 1515–1518, 2004, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/36096.