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Article: Controlling energy-level alignments at carbon nanotube/Au contacts

TitleControlling energy-level alignments at carbon nanotube/Au contacts
Authors
Issue Date2003
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/nanolett
Citation
Nano Letters, 2003, v. 3 n. 6, p. 783-787 How to Cite?
AbstractThe properties of the contacts between single-walled carbon nanotubes (SWNTs) and Au electrodes are studied using scanning Kelvin probe and electrostatic force microscopies. Contact potential differences and local dipoles at the SWNT/Au interface are determined under various conditions involving gas adsorption and surface passivation. In particular, the effects of the coadsorption of alkanethiol, S, and O2 are explored in detail. We find that the coadsorbates alter the energy-level line-up at the contacts and induce significant shifts of the SWNT bands relative to the metal Fermi level. This behavior is explained by considering the response of the local Au work function to the presence of the nanotube and of the coadsorbates as well as the effects of the adsorbate dipoles near the contacts. Finally, we use coadsorption to control the Schottky barrier height at the nanotube-Au contacts.
Persistent Identifierhttp://hdl.handle.net/10722/174872
ISSN
2015 Impact Factor: 13.779
2015 SCImago Journal Rankings: 9.006
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorCui, Xen_US
dc.contributor.authorFreitag, Men_US
dc.contributor.authorMartel, Ren_US
dc.contributor.authorBrus, Len_US
dc.contributor.authorAvouris, Pen_US
dc.date.accessioned2012-11-26T08:47:55Z-
dc.date.available2012-11-26T08:47:55Z-
dc.date.issued2003en_US
dc.identifier.citationNano Letters, 2003, v. 3 n. 6, p. 783-787en_US
dc.identifier.issn1530-6984en_US
dc.identifier.urihttp://hdl.handle.net/10722/174872-
dc.description.abstractThe properties of the contacts between single-walled carbon nanotubes (SWNTs) and Au electrodes are studied using scanning Kelvin probe and electrostatic force microscopies. Contact potential differences and local dipoles at the SWNT/Au interface are determined under various conditions involving gas adsorption and surface passivation. In particular, the effects of the coadsorption of alkanethiol, S, and O2 are explored in detail. We find that the coadsorbates alter the energy-level line-up at the contacts and induce significant shifts of the SWNT bands relative to the metal Fermi level. This behavior is explained by considering the response of the local Au work function to the presence of the nanotube and of the coadsorbates as well as the effects of the adsorbate dipoles near the contacts. Finally, we use coadsorption to control the Schottky barrier height at the nanotube-Au contacts.en_US
dc.languageengen_US
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/nanoletten_US
dc.relation.ispartofNano Lettersen_US
dc.titleControlling energy-level alignments at carbon nanotube/Au contactsen_US
dc.typeArticleen_US
dc.identifier.emailCui, X: xdcui@hku.hken_US
dc.identifier.authorityCui, X=rp00689en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1021/nl034193aen_US
dc.identifier.scopuseid_2-s2.0-0141856564en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0141856564&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume3en_US
dc.identifier.issue6en_US
dc.identifier.spage783en_US
dc.identifier.epage787en_US
dc.identifier.isiWOS:000183521500019-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridCui, X=10839907500en_US
dc.identifier.scopusauthoridFreitag, M=7005690520en_US
dc.identifier.scopusauthoridMartel, R=7005192077en_US
dc.identifier.scopusauthoridBrus, L=7006575230en_US
dc.identifier.scopusauthoridAvouris, P=35515675000en_US

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