Journal Article

PHPPUBDB-10396

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png The role of oxygen at the interface between titanium and carbon nanotubes

Felten, A. ; Suarez-Martinez, I. ; Ke, X. ; Van Tendeloo, G. ; Ghijsen, J. ; Pireaux, J.-J. ; Drube, W. ; Bittencourt, C. ; Ewels, C. P. ; DESY

2009
Wiley-VCH Verl. Weinheim

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Please use a persistent id in citations: doi:10.1002/cphc.200900193

Abstract: We study the interface between carbon nanotubes (CNTs) and surface-deposited titanium using electron microscopy and photoemission spectroscopy, supported by density functional calculations. Charge transfer from the Ti atoms to the nanotube and carbide formation is observed at the interface which indicates strong interaction. Nevertheless, the presence of oxygen between the Ti and the CNTs significantly weakens the Ti-CNT interaction. Ti atoms at the surface will preferentially bond to oxygenated sites. Potential sources of oxygen impurities are examined, namely oxygen from any residual atmosphere and pre-existing oxygen impurities on the nanotube surface, which we enhance through oxygen plasma surface pre-treatment. Variation in literature data concerning Ohmic contacts between Ti and carbon nanotubes is explained via sample pre-treatment and differing vacuum levels, and we suggest improved treatment routes for reliable Schottky barrier-free Ti-nanotube contact formation.

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Contributing Institute(s):

1. Experiments with synchrotron radiation (HASYLAB)

Research Program(s):

1. DORIS Beamline BW2 (POF1-550) (POF1-550)

Experiment(s):

1. DORIS Beamline BW2 (DORIS III)

Appears in the scientific report 2009
Notes: (c) Wiley-Blackwell

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Database coverage:
; ; JCR ; No Author Disambiguation ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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