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Far-infrared spectroscopy investigation of sulfur-oxygen interactions in pi-conjugated oligomers 
Auteur(s): Hermet P., Bantignies J.-L., Lère-Porte Jean-Pierre, Serein-Spirau Françoise
(Article) Publié:
Chemical Physics Letters, vol. 535 p.116 (2012)
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introduction au formalisme de l'EXAFS
Auteur(s): Bantignies J.-L.
Conférence invité: Ecole d'initiation à la spectroscopie d'absorption X (SAX2012) (Montpellier, FR, 2012-07-02)
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New Insights on Vibrational Dynamics of Corannulene
Auteur(s): Le Parc R., Hermet P., Rols Stephane, Maurin D., Alvarez L., Ivanov Alexandre, Quimby Jennifer M., Hanley Caitlin G., Scott Lawrence T., Bantignies J.-L.
(Article) Publié:
The Journal Of Physical Chemistry C, vol. 116 p.25089-25096 (2012)
Ref HAL: hal-00811653_v1
DOI: 10.1021/jp307536d
WoS: 000311650400029
Exporter : BibTex | endNote
11 Citations
Résumé: Vibrational dynamics in the corannulene crystal is exhaustively studied through Raman scattering, infrared spectroscopy, and inelastic neutron scattering. Experimental data are coupled to simulations of the phonon modes performed in the framework of first principle calculations. Intermolecular vibrations (libration and translation) are assigned in the low frequency domain (10-200 cm-1). These modes exhibit specific temperature dependence in the far-infrared.
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Computation of the infrared active modes in single-walled boron nitride nanotube bundles
Auteur(s): Fakrach B., Rahmani A., Chadli H., Sbai K., Benhamou M., Bentaleb M., Bantignies J.-L., Sauvajol J.-L.
(Article) Publié:
Journal Of Physics: Condensed Matter, vol. 24 p.335304 (2012)
Ref HAL: hal-00753011_v1
PMID 22836107
DOI: 10.1088/0953-8984/24/33/335304
WoS: 000306997300005
Exporter : BibTex | endNote
6 Citations
Résumé: In this work, the infrared active modes are computed for homogeneous bundles of single-walled boron nitride nanotubes (BBNNTs), using the so-called spectral moments method. The dependence of the wavenumber on these modes in terms of diameters, lengths, and numbers of tubes, is investigated. To this end, use is made of a Lennard-Jones potential for describing the van der Waals interactions between tubes in a bundle. We find that, for a finite homogeneous bundle, additional modes appear as a specific signature. Finally, these results are useful for the interpretation of the experimental infrared spectra of BBNNTs.
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Spectroscopic study of double-walled carbon nanotubes functionalization for preparation of carbon nanotube / epoxy composites
Auteur(s): Leon Vincent, Parret R., Almairac Robert, Alvarez L., Babaa Moulay-Rachid, Doyle Brian P., Ienny Patrick, Parent Philippe, Zahab A. A., Bantignies J.-L.
(Article) Publié:
Carbon, vol. 50 p.4987-4994 (2012)
Texte intégral en Openaccess : 
Ref HAL: hal-00711335_v3
Ref Arxiv: 1206.5464
DOI: 10.1016/j.carbon.2012.06.007
WoS: 000308898900001
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
31 Citations
Résumé: A spectroscopic study of the amino functionalization of double-walled carbon nanotube (DWCNT) is performed. Original experimental investigations by near edge X-ray absorption fine structure spectroscopy at the C and O K-edges allow one to follow the efficiency of the chemistry during the different steps of covalent functionalization. Combined with Raman spectroscopy, the characterization gives a direct evidence of the grafting of amino-terminated molecules on the structural defects of the DWCNT external wall, whereas the internal wall does not undergo any change. Structural and mechanical investigation of the amino functionalized DWCNT / epoxy composites show coupling between epoxy molecules and the DWCNTs. Functionalization improves the interface between amino-functionalized DWCNT and the epoxy molecules. The electrical transport measurements indicate a percolating network formed only by inner metallic tubes of the DWCNTs. The activation energy of the barriers between connected metallic tubes is determined around 20 meV.
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Infrared spectrum of single-walled boron nitride nanotubes
Auteur(s): Fakrach B., Rahmani A., Chadli H., Sbai K., Bentaleb M., Bantignies J.-L., Sauvajol J.-L.
(Article) Publié:
-Physical Review B Condensed Matter And Materials Physics (1998-2015), vol. 85 p.115437 (2012)
Ref HAL: hal-00691320_v1
DOI: 10.1103/PhysRevB.85.115437
WoS: 000301916100007
Exporter : BibTex | endNote
18 Citations
Résumé: Using the spectral moment's method, the infrared spectra of single-walled boron nitride nanotubes are calculated. The dependence of these modes has been calculated as a function of the nanotube chirality, diameter (from 0.7 to 5 nm), and length. These predictions are useful for understanding the experimental infrared spectra of boron nitride nanotubes.
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