Administration Locale:- Membre du conseil du laboratoire
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Domaines de Recherche: - Physique/Matière Condensée/Matière Molle
- Physique/Matière Condensée/Science des matériaux
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Productions scientifiques :

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Behavior of colloidal particles at a nematic liquid crystal interface 
Auteur(s): GHARBI M. A., NOBILI M., IN M., PREVOT G., Galatola Paolo, Fournier Jean-Baptiste, BLANC C.
(Article) Publié:
Soft Matter, vol. 7 p.1467 (2011)
Ref HAL: hal-00565584_v1
DOI: 10.1039/C0SM00863J
Résumé: We examine the behavior of spherical silica particles trapped at an air-nematic liquid crystal interface. When a strong normal anchoring is imposed, the beads spontaneously form various structures depending on their area density and the nematic thickness. Using optical tweezers, we determine the pair potential and explain the formation of these patterns. The energy profile is discussed in terms of capillary and elastic interactions. Finally, we detail the mechanisms that control the formation of a hexagonal lattice and analyze the role of gravity for curved interfaces.
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Relation between structure and mechanical properties (elastoplastic and fracture behavior) of hybrid organic-inorganic coating 
Auteur(s): Ferchichi Abdelkarim, Etienne-Calas Sylvie, Smaihi Monique, Prevot G., Solignac P., Etienne P.
(Article) Publié:
Journal of Materials Science, vol. 44 p.2752-2758 (2009)
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Crack opening profile in DCDC specimen 
Auteur(s): Pallares Gaël, Ponson Laurent, Grimaldi Antoine, George M., Prevot G., Ciccotti Matteo
(Article) Publié:
International Journal of Fracture, vol. 156 p.11-20 (2009)
Ref HAL: hal-00371380_v1
Ref Arxiv: 0903.5192
DOI: 10.1007/s10704-009-9341-8
Résumé: The opening profile of the cracks produced in the Double Cleavage Drilled Compression (DCDC) specimens for brittle materials is investigated. The study is achieved by combining Finite element simulations of a DCDC linear elastic medium with experimental measurements by crack opening interferometry on pure silica glass samples. We show that the shape of the crack can be described by a simple expression as a function of the geometrical parameters of the sample and the external loading conditions. This result can be used to measure accurately in real time relevant quantities during DCDC experiments, such as the crack length or the stress intensity factor applied to the specimen.
Commentaires: Accepted for publication in the International Journal of Fracture
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Le spectrographe hyper-Raman
Auteur(s): Prevot G., Arnould Emmanuel, Clément S., Cohen Thomas, Delmas Jérôme, Hehlen B., Longueteau E., Roudil G., Simon Guilhem, Solignac P., Vialla R.
(Affiches/Poster)
Comité d'Evaluation du LCVN (Montpellier, France, FR), 2006-02-23
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