Creation of paired electron states in the gap of semiconducting carbon nanotubes by correlated hydrogen adsorption

Gilles Buchs, Arkady V Krasheninnikov, Pascal Ruffieux, Pierangelo Gröning, Adam S Foster, Risto M Nieminen, Oliver Gröning

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

33 Sitaatiot (Scopus)
39 Lataukset (Pure)

Abstrakti

The specific, local modification of the electronic structure of carbon nanomaterials is as important for novel electronic device fabrication as the doping in the case of silicon-based electronics. Here, we report low temperature scanning tunneling microscopy and spectroscopy study of semiconducting carbon nanotubes subjected to hydrogen-plasma treatment. We show that plasma treatment mostly results in the creation of paired electronic states in the nanotube band gap. Combined with extensive first-principle simulations, our results provide direct evidence that these states originate from correlated chemisorption of hydrogen adatoms on the tube surface. The energy splitting of the paired states is governed by the adatom–adatom interaction, so that controlled hydrogenation can be used for engineering the local electronic structure of nanotubes and other sp2-bonded nanocarbon systems.
AlkuperäiskieliEnglanti
Artikkeli275
Sivut1-12
Sivumäärä12
JulkaisuNew Journal of Physics
Vuosikerta9
NumeroAugust 2007
DOI - pysyväislinkit
TilaJulkaistu - 2007
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

Tutkimusalat

  • carbon nanotubes

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