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Title
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Electronic structure of Pd nanoparticles on carbon nanotubes
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Author
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Abstract
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| The effect of the oxygen plasma treatment on the electronic states of multi-wall carbon nanotubes (MWCNTs) is analyzed by X-ray photoemission measurements (XPS) and UPS, both using synchrotron radiation. It is found that the plasma treatment effectively grafts oxygen at the CNT-surface. Thereafter, the interaction between evaporated Pd and pristine or oxygen plasma-treated MWCNTs is investigated. Pd is found to nucleate at defective sites, whether initially present or introduced by oxygen plasma treatment. The plasma treatment induced a uniform dispersion of Pd clusters at the CNT-surface. The absence of additional features in the Pd 3d and C I s core levels spectra testifies that no Pd-C bond is formed. The shift of the Pd 3d core level towards high-binding energy for the smallest clusters is attributed to the Coulomb energy of the charged final state. (C) 2008 Elsevier Ltd. All rights reserved. |
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Language
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English
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Source (journal)
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Micron. - Oxford, 1993, currens
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Publication
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Oxford
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Pergamon
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2009
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ISSN
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0968-4328
[print]
1878-4291
[online]
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DOI
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10.1016/J.MICRON.2008.01.013
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Volume/pages
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40
:1
(2009)
, p. 74-79
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ISI
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000261420900015
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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