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Carbon based composites nanomaterials, physical properties and applications
Auteur(s): Bantignies J.-L.
(Séminaires)
Rostov (Rostov, RU), 2009-12-01 |
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Auto assemblage dans les composés hybrides organiques inorganiques
Auteur(s): Bantignies J.-L.
(Séminaires)
Meknes (Meknes, MA), 2009-10-07 |
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Nanostructuring of Hybrid Silicas through a Self-Recognition Process 
Auteur(s): Arrachart Guilhem, Creff Gaëlle, Wadepohl Hubert, Blanc C., Bonhomme Christian, Babonneau Florence, Alonso Bruno, Bantignies J.-L., Carcel Carole, Moreau Joël J. E., Dieudonne-George P., Sauvajol J.-L., Massiot Dominique, Wong Chi Man Michel
(Article) Publié:
Chemistry - A European Journal, vol. 15 p.5002 (2009)
Ref HAL: hal-01224956_v1
PMID 19350601
DOI: 10.1002/chem.200802748
WoS: 000266292200007
Exporter : BibTex | endNote
13 Citations
Résumé: The hydrolysis and condensation of a silylated derivative of ureidopyrimidinone led to nanostructured hybrid silica, such as that depicted, as clearly shown by powder XRD studies. The nanostructuring was directly related to molecular recognition through hydrogen bonding. By combining FTIR, solution and solid-state NMR spectroscopic data, the transcription of the hydrogen-bonding networks from the precursor to the final product was clearly evidenced.
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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 (SAX2009)) (Montpellier, FR, 2009-06-15)
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Lattice Dynamics of Oligo(phenylenethienylene)s: A Far-Infrared and Inelastic Neutron Scattering Study
Auteur(s): Hermet P. , Lois-Sierra Sandrine, Bantignies J.-L., Rols Stéphane, Sauvajol J.-L., Serein Françoise, Lère-Porte Jean-Pierre, Moreau Joël J. E.
(Article) Publié:
The Journal Of Physical Chemistry B, vol. 113 p.4197-4202 (2009)
Ref HAL: hal-00394444_v1
PMID 19254013
DOI: 10.1021/jp808652c
WoS: 000264591800027
Exporter : BibTex | endNote
6 Citations
Résumé: New promising oligo(phenylenethienylene)s have been synthesized to realize suitable materials for improving electronic transport properties, particularly in organic field effect transistors (OFETs). Far-infrared and incoherent neutron scattering measurements have been performed to assign their phonon modes. The assignment of the main low-frequency phonon modes of these materials has been performed experimentally by using a filiation procedure. Assuming a small frequency dispersion of the high-frequency modes, the main intramolecular phonon modes of a model oligomer have been assigned by using first-principles calculations on its isolated molecule. These assignments constitute the preliminary work for a better understanding of these new promising materials in electronic and opto-electronics applications.
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Silica structural changes induced by thermal treatment or ionic implantation as probed by IR reflectance spectroscopy
Auteur(s): Bibent N., Faivre A., Ferru G., Bantignies J.-L., Peuget S.
(Article) Publié:
Journal Of Applied Physics, vol. 106 p.063512 (2009)
DOI: 10.1063/1.3223326
WoS: 000270378100046
8 Citations
Résumé: Fourier transformed infrared microreflectance spectroscopy is used to probe and compare the consequences of thermal quenching or ionic implantation on the structure of silica. A linear change in the main structural feature associated with Si-O-Si vibration with fictive temperature (T-f) is observed up to T-f = 1400 degrees C. Ionic implantation is shown to shift the frequency of the main IR Si-O-Si vibration toward much lower wavenumbers, for all deposited energies, indicating that a comparison can be drawn between fictive temperature and irradiation effects. Extrapolating the linear changes in the IR structural bands obtained as a function of T-f for the implanted samples, we show that two structural (nu(TO)) and (nu(B)) contributions are not affected by ionic implantation, as they would be by a unique very high T-f. In the case of ionic implantation, we also evidence the development of some specific structural contributions indicating a depolymerization of silica network. (C) 2009 American Institute of Physics. [doi: 10.1063/1.3223326]
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`Etude par spectroscopie infrarouge de l'amorphisation des zéolites sous pression et du mécanisme
d'auto-organisation d'une silice hybride
Auteur(s): Levelut C., Haines Julien, Isambert Aude, Hébert Philippe, Cambon Olivier, Maurin D., Creff Gaelle, Bantignies J.-L., Wong chi man Michel, Hermet P.
Conference: 6ième Forum de technologie des hautes pressions: Les verrous technologiques dans l'expérimentation (Batz sur mer, FR, 2008-10-06)
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