RING DENSITY AND INTER-TETRAHEDRA BOND ANGLE OF SILICATE GLASSES: A FEMTOSECOND AND RAMAN SPECTROSCOPY STUDY
| hal.structure.identifier | Laboratoire des colloïdes, verres et nanomatériaux [LCVN] | |
| dc.contributor.author | HEHLEN, Bernard | |
| hal.structure.identifier | Laboratoire des colloïdes, verres et nanomatériaux [LCVN] | |
| dc.contributor.author | NOGUERA, Olivier | |
| hal.structure.identifier | Centre de physique moléculaire optique et hertzienne [CPMOH] | |
| dc.contributor.author | LANGOT, P. | |
| hal.structure.identifier | Laboratoire de Spectrométrie Ionique et Moléculaire [LASIM] | |
| dc.contributor.author | VALLÉE, F. | |
| dc.date.conference | 2010-06-27 | |
| dc.description.abstractEn | The concentration of the fourfold and threefold ring modes of normal and densified silica has been quantitatively extracted using time-domain Raman spectroscopy. Their frequency and width are precisely determined even when they are partly masked by a broad background in spontaneous Raman spectroscopy [1,2]. Experiments performed in GeO2 also reveal the existence of a weak vibrational mode ascribed to oxygen motion in three-membered rings [3]. In permanently densified silicas, the variation of the Raman intensity upon densification is very different for bending and stretching modes. For the former we find a Raman coupling-to-light coefficient CB µ w2. This allows to derive a simple law relating the frequency of the bending modes with the Si-O-Si bond-angle in the network and in the fourfold and threefold rings [4]. The model has been applied to densified silicas and sodo-silicates glasses, and the results compare well to numerical simulations. This simple Raman-spectra analysis could become part of the routine characterization of the local and medium range structure of silica-based glasses. | |
| dc.language.iso | en | |
| dc.title.en | RING DENSITY AND INTER-TETRAHEDRA BOND ANGLE OF SILICATE GLASSES: A FEMTOSECOND AND RAMAN SPECTROSCOPY STUDY | |
| dc.type | Communication dans un congrès | |
| dc.subject.hal | Physique [physics]/Matière Condensée [cond-mat]/Systèmes désordonnés et réseaux de neurones [cond-mat.dis-nn] | |
| bordeaux.country | FR | |
| bordeaux.conference.city | Paris | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00528016 | |
| hal.version | 1 | |
| hal.invited | non | |
| hal.proceedings | non | |
| hal.conference.end | 2010-07-02 | |
| hal.popular | non | |
| hal.audience | Non spécifiée | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00528016v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.au=HEHLEN,%20Bernard&NOGUERA,%20Olivier&LANGOT,%20P.&VALL%C3%89E,%20F.&rft.genre=unknown |
Fichier(s) constituant ce document
| Fichiers | Taille | Format | Vue |
|---|---|---|---|
|
Il n'y a pas de fichiers associés à ce document. |
|||