Accueil >
Production scientifique
(394) Production(s) de l'année 2014
|
|
Off-Equilibrium Surface Tension in Colloidal Suspensions 
Auteur(s): Truzzolillo D., Mora S., Dupas C., Cipelletti L.
(Article) Publié:
Physical Review Letters, vol. 112 p.128303 (2014)
Texte intégral en Openaccess : 
Ref HAL: hal-00966355_v1
DOI: 10.1103/PhysRevLett.112.128303
WoS: 000333917400012
Exporter : BibTex | endNote
26 Citations
Résumé: We study the fingering instability of the interface between two miscible fluids, a colloidal suspension and its own solvent. The temporal evolution of the interface in a Hele-Shaw cell is found to be governed by the competition between the nonlinear viscosity of the suspension and an off-equilibrium, effective surface tension Γe. By studying suspensions in a wide range of volume fractions, Φ, we show that Γe∼Φ^2, in agreement with Korteweg's theory for miscible fluids. The surface tension exhibits an anomalous increase with particle size, which we account for using entropy arguments.
|
|
|
|
Métallurgie colloïdale: utilisation d’un analogue colloïdal pour étudier la plasticité des polycristaux
Auteur(s): Ramos L.
Conférence invité: Journée scientifique de la Fédération Galileo Galilei Grenoble “Mécanique et Physique des (grenoble, FR, 2014-03-19)
|
|
|
|
High performance bilayer-graphene terahertz detectors
Auteur(s): Spirito Davide, Coquillat D., de Bonis Sergio L., Lombardo Antonio, Bruna Matteo, Ferrari Andrea C., Pellegrini Vittorio, Tredicucci Alessandro, Knap W., Vitiello Miriam S.
(Article) Publié:
Applied Physics Letters, vol. 104 p.061111 (2014)
Texte intégral en Openaccess :
Ref HAL: hal-00960242_v1
Ref Arxiv: 1312.3737
DOI: 10.1063/1.4864082
WoS: 000331803800011
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
149 Citations
Résumé: We report bilayer-graphene field effect transistors operating as Terahertz (THz) broadband photodetectors based on plasma-waves excitation. By employing wide-gate geometries or buried gate configurations, we achieve a responsivity ∼1.2 V/W (1.3 mA/W) and a noise equivalent power ∼2 × 10−9 W/√Hz in the 0.29-0.38 THz range, in photovoltage and photocurrent mode. The potential of this technology for scalability to higher frequencies and the development of flexible devices makes our approach competitive for a future generation of THz detection systems.
|
 |
Voyage au cœur de la matière molle: nanoparticules, nanomédecine, et œnologie
Auteur(s): Oberdisse J.
(Séminaires)
Université du Tiers Temps (Montpellier, FR), 2014-03-20 |
|
|
|
Voyage au cœur de la matière molle: nanoparticules, nanomédecine, et œnologie
Auteur(s): Oberdisse J.
Conférence invité: Les Mercredis de la Connaissance de l'Observatoire Océanologique de Banyuls (Banyuls-sur-mer, FR, 2014-03-19)
|
|
|
|
Terahertz wireless communication using GaAs transistors as detectors
Auteur(s): Tohme L., Blin S., Ducournau Guillaume, Nouvel P., Coquillat D., Hisatake S., Nagatsuma T., Pénarier A., Varani L., Knap W., Lampin Jean-Francois
(Article) Publié:
Electronics Letters, vol. 50 p.323-325 (2014)
Texte intégral en Openaccess : 
Ref HAL: hal-00954475_v1
DOI: 10.1049/el.2013.3702
WoS: 000331405200051
Exporter : BibTex | endNote
20 Citations
Résumé: The detection of high data-rate wireless communication using a terahertz- frequency carrier, and a GaAs transistor as a detector, is reported. Communications are investigated around 0.2 and 0.3087 THz. For the first time, an error-free transmission at data rates up to 8.2 Gbit/s is demonstrated, using a carrier frequency of 0.3087 THz.
|
|
|
|
Fivebrane instantons in Calabi-Yau compactifications
Auteur(s): Alexandrov S., Banerjee S.
(Article) Publié:
Physical Review D, vol. 90 p.041902(R) (2014)
Texte intégral en Openaccess :
Ref HAL: hal-00958486_v1
Ref Arxiv: 1403.1265
DOI: 10.1103/PhysRevD.90.041902
WoS: 000341287800002
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
11 Citations
Résumé: We provide the last missing piece of the complete non-perturbative description of the low energy effective action emerging from Calabi-Yau compactifications of type II string theory --- NS5-brane instanton corrections to the hypermultiplet moduli space $M_H$. We find them using S-duality symmetry of the type IIB formulation. The result is encoded in a set of holomorphic functions on the twistor space of $M_H$ and includes all orders of the instanton expansion.
Commentaires: 5 pages
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 
