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Interaction rayonnement matière 
Auteur(s): Bantignies J.-L.
Conférence invité: Ecole d'été : initiation à la spectroscopie Raman pour l'étude des nanostructures à base de carbone (Montpellier, FR, 2013-07-01)
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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 (SAX2013) (Montpellier, FR, 2013-06-10)
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Spectroscopie infrarouge : Introduction et potentialités pour l'étude de la matière condensée
Auteur(s): Bantignies J.-L.
Conférence invité: Utilisation de la spectroscopie Raman et infrarouge pour l'étude de la matière condensée (Amiens, FR, 2013-06-05)
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Infrared spectroscopy and non covalent interactions
Auteur(s): Bantignies J.-L.
Conférence invité: ENANO2013, school on Nanoscience and nanotechnology (Choroni, VE, 2013-01-20)
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New Insigths on Photo-Active Molecules Within Host Carbon Nanotubes
Auteur(s): Alvarez L., Almadori Y., Mariot S., Aznar R., Arenal R., Michel T., Le Parc R., Dieudonne-George P., Jousselme Bruno, Campidelli S., Bantignies J.-L.
(Article) Publié:
Journal Of Nanoelectronics And Optoelectronics, vol. 8 p.28-35 (2013)
Ref HAL: hal-00826969_v1
DOI: 10.1166/jno.2013.1426
WoS: 000317537600006
Exporter : BibTex | endNote
3 Citations
Résumé: Photo-active molecules are confined into single-wall carbon nanotubes to create 1D hybrid systems with new and original opto-electronic properties. This work deals with the encapsulation of quaterthiophene derivative and phthalocyanine molecules. They display strong optical absorption in the visible range, respectively around 400 and 670 nm. Encapsulation efficiency is investigated through Transmission Electron Microscopy. The physical interactions are mainly investigated by optical spectroscopies. The Raman spectra of the oligothiophene hybrid systems exhibit a striking dependence with the excitation energy which is correlated to the optical absorption energy of the photo-active molecule. Close to the molecule resonance, the results suggest a significant photo-induced charge transfer between the photo-active molecules and the nanotubes. In addition, the resonance window of the confined molecules depends on the nanotube diameter. The Raman spectra of the phthalocyanine based systems depend on the optical resonance conditions of the encapsulated molecules and on the structural properties of the hybrid system.
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Self-Assembly of Bridged Silsesquioxanes: Modulating Structural Evolution via Cooperative Covalent and Non-covalent Interactions
Auteur(s): Creff Gaëlle, Pichon Benoît P., Blanc C., Maurin D., Sauvajol J.-L., Carcel Carole, Moreau Joël, Roy Pascale, Bartlett John R., Wong Chi Man Michel, Bantignies J.-L.
(Article) Publié:
Langmuir, vol. 29 p.5581 (2013)
Ref HAL: hal-00819327_v1
PMID 23574041
DOI: 10.1021/la400293k
WoS: 000318756200025
Exporter : BibTex | endNote
28 Citations
Résumé: The self-assembly of a bis-urea phenylene-bridged silsesquioxane precursor during sol-gel synthesis has been investigated by in situ infrared spectroscopy, optical microscopy and light scattering. In particular, the evolution of the system as a function of processing time was correlated with covalent interactions associated with increasing polycondensation and non-covalent interactions such as hydrogen bonding. A comprehensive mechanism based on the hydrolysis of the phenylene-bridged organosilane precursor prior to the crystallization of the corresponding bridged silsesquioxane via H bonding and subsequent irreversible polycondensation is proposed.
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1D-confinement of polyiodides inside single-wall carbon nanotubes
Auteur(s): Chorro M., Kane G., Alvarez L., Cambedouzou J., Paineau E., Rossberg A., Kociak M., Aznar R., Pascarelli S., Launois P., Bantignies J.-L.
(Article) Publié:
Carbon, vol. 52 p.100-108 (2013)
Texte intégral en Openaccess : 
Ref HAL: hal-00808165_v1
DOI: 10.1016/j.carbon.2012.09.010
WoS: 000314192700012
Exporter : BibTex | endNote
18 Citations
Résumé: 1D-confinement of polyiodides inside single-wall carbon nanotubes (SWCNT) is investigated. Structural arrangement of iodine species as a function of the SWCNT diameters is studied. Evidence for long range one dimensional ordering of the iodine species is shown by X-ray and electron diffraction experiments independently of the tube diameter. The structure of the confined polyiodides is investigated by X-ray absorption spectroscopy. The confinement influences the local arrangement of the chains. Below a critical diameter Fc of 1 nm, long linear polyiodides are evidenced leading to a weaker charge transfer than for nanotube diameter above Fc. A shortening of the polyiodides is exhibited with the increase of the nanotube diameter leading to a more efficient charge transfer. This point reflects the 1D-confinement of the polyiodides inside the nanotubes.
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