Electrical conduction of carbon nanotube forests through sub-nanometric films of alumina

S. Esconjauregui, R. Xie, Y. Guo, S.M.-L. Pfaendler, M. Fouquet, R. Gillen, C. Cepek, C. Castellarin-Cudia, S Eslava, J. Robertson

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

We report both the growth of carbon nanotube forests and electrical conduction on W, Ti, and TiN substrates coated with an ultra-thin Al O support layer. Varying the AlO thickness, a good electrical contact and high nanotube density is possible for a 0.5 nm AlO layer as such an ultra-thin film allows tunnelling. X-ray photoelectron spectroscopy shows that, when using these non-continuous AlO films, Fe catalyst diffuses into the conducting substrates, eventually causing growth to stop. Forests grown on ultra-thin AlO are potentially useful for applications as interconnects, supercapacitors, and heat spreaders.
Original languageEnglish
JournalApplied Physics Letters
Volume102
Issue number11
DOIs
Publication statusPublished - 18 Mar 2013

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