[Étude couplée par TEM/EELS et STM/STS des propriétés structurales et électroniques des nanotubes C et ]
Les nanotubes de carbone sont lʼobjet dʼimportants efforts de recherche en raison de leurs fascinantes propriétés physiques. Ils constituent un système modèle particulièrement intéressant pour lʼétude fondamentale de matériaux à une dimension et pour lʼélectronique moléculaire. Selon leur chiralité, les nanotubes peuvent adopter un comportement électronique soit semiconducteur soit métallique. Leur spectre électronique est dominé par une série de singularités de Van Hove qui définit la bande interdite des tubes semiconducteurs et les orbitales moléculaires situées à ces énergies. Pour contrôler et moduler les propriétés électroniques des nanotubes, une voie prometteuse est dʼutiliser le dopage par des hétéroatomes. Les travaux présentés ici portent sur lʼétude expérimentale de lʼinfluence des interactions à N corps sur la valeur de la bande interdite des tubes semiconducteurs, la visualisation dans lʼespace direct des orbitales moléculaires des nanotubes et les propriétés des nanotubes dopés par lʼazote en utilisant des mesures de microscopie tunnel, microscopie électronique à balayage et spectroscopie de perte dʼénergie des électrons.
Carbon nanotubes are the focus of considerable research efforts due to their fascinating physical properties. They provide an excellent model system for the study of one-dimensional materials and molecular electronics. The chirality of nanotubes can lead to very different electronic behaviour, either metallic or semiconducting. Their electronic spectrum consists of a series of Van Hove singularities defining a bandgap for semiconducting tubes and molecular orbitals at the corresponding energies. A promising way to tune the nanotubes electronic properties for future applications is to use doping by heteroatoms. Here we report on the experimental investigation of the role of many-body interactions in nanotube bandgaps, the visualization in direct space of the molecular orbitals of nanotubes and the properties of nitrogen doped nanotubes using scanning tunneling microscopy and transmission electron microscopy as well as electron energy loss spectroscopy.
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Mot clés : Nanotubes de carbone, STM/STS, EELS
Hong Lin 1, 2 ; Jérôme Lagoute 2 ; Vincent Repain 2 ; Cyril Chacon 2 ; Yann Girard 2 ; Jean-Sébastien Lauret 3 ; Raul Arenal 1, 4 ; François Ducastelle 1 ; Sylvie Rousset 2 ; Annick Loiseau 1
@article{CRPHYS_2011__12_9-10_909_0,
author = {Hong Lin and J\'er\^ome Lagoute and Vincent Repain and Cyril Chacon and Yann Girard and Jean-S\'ebastien Lauret and Raul Arenal and Fran\c{c}ois Ducastelle and Sylvie Rousset and Annick Loiseau},
title = {Coupled study by {TEM/EELS} and {STM/STS} of electronic properties of {C-} and $ {\text{CN}}_{x}$-nanotubes},
journal = {Comptes Rendus. Physique},
pages = {909--920},
publisher = {Elsevier},
volume = {12},
number = {9-10},
year = {2011},
doi = {10.1016/j.crhy.2011.10.013},
language = {en},
}
TY - JOUR
AU - Hong Lin
AU - Jérôme Lagoute
AU - Vincent Repain
AU - Cyril Chacon
AU - Yann Girard
AU - Jean-Sébastien Lauret
AU - Raul Arenal
AU - François Ducastelle
AU - Sylvie Rousset
AU - Annick Loiseau
TI - Coupled study by TEM/EELS and STM/STS of electronic properties of C- and $ {\text{CN}}_{x}$-nanotubes
JO - Comptes Rendus. Physique
PY - 2011
SP - 909
EP - 920
VL - 12
IS - 9-10
PB - Elsevier
DO - 10.1016/j.crhy.2011.10.013
LA - en
ID - CRPHYS_2011__12_9-10_909_0
ER -
%0 Journal Article
%A Hong Lin
%A Jérôme Lagoute
%A Vincent Repain
%A Cyril Chacon
%A Yann Girard
%A Jean-Sébastien Lauret
%A Raul Arenal
%A François Ducastelle
%A Sylvie Rousset
%A Annick Loiseau
%T Coupled study by TEM/EELS and STM/STS of electronic properties of C- and $ {\text{CN}}_{x}$-nanotubes
%J Comptes Rendus. Physique
%D 2011
%P 909-920
%V 12
%N 9-10
%I Elsevier
%R 10.1016/j.crhy.2011.10.013
%G en
%F CRPHYS_2011__12_9-10_909_0
Hong Lin; Jérôme Lagoute; Vincent Repain; Cyril Chacon; Yann Girard; Jean-Sébastien Lauret; Raul Arenal; François Ducastelle; Sylvie Rousset; Annick Loiseau. Coupled study by TEM/EELS and STM/STS of electronic properties of C- and $ {\text{CN}}_{x}$-nanotubes. Comptes Rendus. Physique, Volume 12 (2011) no. 9-10, pp. 909-920. doi : 10.1016/j.crhy.2011.10.013. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2011.10.013/
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