Accueil >
Production scientifique
(93) Production(s) de MICHEL T.
|
|
Evidence of selective cation transport through sub-2 nm single-walled carbon nanotubes 
Auteur(s): Yazda K., Tahir S., Michel T., Henn F., Jourdain V.
(Article) Publié:
Mrs Advances, vol. 1 p.2079-2084 (2016)
Ref HAL: hal-01928862_v1
DOI: 10.1557/adv.2016.323
WoS: WOS:000412635300009
Exporter : BibTex | endNote
Résumé: The electrophoretic transport of ions through single wall carbon nanotubes (SWCNTs) of diameters between 1.2 and 1.8 nm was studied for different monovalent chloride salts using microfluidic devices incorporating either a single or a few CNTs in parallel. The ionic conductance was found to be about one order of magnitude higher than expected from a simple electro-migration behavior without any surface effect. Importantly, the ionic conductance measured for different cations did not scale with their bulk electrophoretic mobility thus indicating a probable selective cation transport through these sub-2 nm SWCNTs. The transport of Na+ was notably found to be favored in comparison to that of Li+ and Cs+ or K+ . These results highlight the influence of steric and surface effects induced by the nano-confinement on the transport of ions through sub-2 nm SWCNTs.
|
|
|
|
Voltage-Activated Ion Transport through Single-Walled Carbon Nanotubes
Auteur(s): Yazda K., Michel T., Tahir S., Picaud Fabien, Loubet Bastien, Manghi Manoel, Palmeri J., Henn F., Jourdain V.
Conference: MRS Fall Meeting (Boston, US, 2016-11-28)
|
 |
Introduction à la spectroscopie Raman
Auteur(s): Michel T.
(Séminaires)
Pole Balard, IEM, Université de Montpellier (Montpellier, FR), 2016-06-07 |
|
|
|
Inter-tube coupling in Carbon Nanotubes studied by Raman spectroscopy
Auteur(s): Michel T.
Conférence invité: GDR-I-GNT meeting (Saint Pierre d'Oléron, FR, 2016-10-09)
Ref HAL: hal-01494907_v1
Exporter : BibTex | endNote
Résumé: Double-walled carbon nanotubes (DWCNT) are made of two concentric and weakly van der Waals coupled single-walled carbon nanotubes (SWCNT), also called layers. DWCNTs are the simplest systems for studying the mechanical and electronic interactions between concentric carbon layers. In this communication, we review recent results concerning the intrinsic features of phonons of DWCNTs obtained from Raman experiments performed on index-identified DWCNTs. The effect of the interlayer distance on the strength of the mechanical coupling between the layers, and thus on the frequencies of the Raman-active modes, namely the radial breathing-like modes (RBLM) [1] and G-modes [2], are evidenced and discussed.
|
|
|
|
Elastic Constants, Optical Phonons, and Molecular Relaxations in the High Temperature Plastic Phase of the CH3NH3PbBr3 Hybrid Perovskite.
Auteur(s): Létoublon Antoine, Paofai Serge, Ruffle B., Bourges Philippe, Hehlen B., Michel T., Ecolivet Claude, Durand Olivier, Cordier Stéphane, Katan Claudine, Even Jacky
(Article) Publié:
Journal Of Physical Chemistry Letters, vol. 7 p.3776-3784 (2016)
Texte intégral en Openaccess : 
|
|
|
|
Study of collective radial breathing-like modes in double-walled carbon nanotubes: combination of continuous two-dimensional membrane theory and Raman spectroscopy
Auteur(s): Levshov D., Avramenko Marina V., Than X. T., Michel T., Arenal Raul, Paillet M., Rybkovskiy Dmitry V., Osadchy Alexander V., Rochal Sergei B., Yuzyuk Yuri I., Sauvajol J.-L.
(Article) Publié:
Journal Of Nanophotonics, vol. 10 p.012502 (2016)
Texte intégral en Openaccess :
Ref HAL: hal-01324441_v1
DOI: 10.1117/1.JNP.10.012502
WoS: WOS:000374239400002
Exporter : BibTex | endNote
5 Citations
Résumé: In this paper, we present an alternative way to study theoretically low-frequency collective modes of DWNTs based on the continuous 2D membrane theory. We obtain aωRBLM (do , di) relation being an equivalent of the conventional formulas established for individual SWNTs. We compare our theoretical predictions with Raman data measured on individual index-identified suspended DWNTs. A good agreement between the experiment and the predictions of the continuous theory is found. We show that the coupling in individual DWNTs strongly depends on the interlayer distance, which is manifested in the frequency shifts of the radial breathing-like modes (RBLMs) with respect to the radial breathing modes (RBM) of the individual inner and outer tubes. In terms of characterization, the combination of Ramanspectroscopy data and the predictions of continuous membrane theory may give additional criteria for the index-identification of DWNTs.
|
