Zobrazeno 1 - 10
of 141
pro vyhledávání: '"Lefort, Ronan"'
Autor:
Malfait, Benjamin, Moréac, Alain, Jani, Aïcha, Lefort, Ronan, Huber, Patrick, Fröba, Michael, Morineau, Denis
Publikováno v:
Journal of Physical Chemistry C, American Chemical Society, In press
The temperature dependence of the structure of water confined in hydrophilic mesostructured porous silica (MCM-41) and hydrophobic benzene-bridged periodic mesoporous organosilicas (PMO) is studied by Raman vibrational spectroscopy. For capillary fil
Externí odkaz:
http://arxiv.org/abs/2201.13057
Autor:
Malfait, Benjamin, Jani, Aicha, Mietner, Jakob Benedikt, Lefort, Ronan, Huber, Patrick, Fröba, Michael, Morineau, Denis
We have investigated the dynamics of water confined in mesostructured porous silicas (SBA-15, MCM-41) and four periodic mesoporous organosilicas (PMOs) by dielectric relaxation spectroscopy. The influence of water-surface interaction has been control
Externí odkaz:
http://arxiv.org/abs/2107.12798
Autor:
Calus, Sylwia, Kityk, Andriy V., Borowik, Lech, Lefort, Ronan, Morineau, Denis, Krause, Christina, Schoenhals, Andreas, Busch, Mark, Huber, Patrick
Publikováno v:
Physical Review E 92, 012503 (2015)
We report a high-resolution dielectric study on a pyrene-based discotic liquid crystal (DLC) in the bulk state and confined in parallel tubular nanopores of monolithic silica and alumina membranes. The positive dielectric anisotropy of the DLC molecu
Externí odkaz:
http://arxiv.org/abs/1507.02627
Autor:
Kityk, Andriy V., Busch, Mark, Rau, Daniel, Calus, Sylwia, Cerclier, Carole V., Lefort, Ronan, Morineau, Denis, Bock, Harald, Grelet, Eric, Krause, Christina, Schoenhals, Andreas, Frick, Bernhard, Huber, Patrick
Publikováno v:
Soft Matter 10, 4522 (2014)
Optical polarimetry measurements of the orientational order of a discotic liquid crystal based on a pyrene derivative and confined in parallel-aligned nanochannels of monolithic mesoporous alumina, silica, and silicon as a function of temperature, ch
Externí odkaz:
http://arxiv.org/abs/1504.02078
Autor:
Lefort, Ronan
Il est très facile de "piéger" des phases moléculaires complexes dans des états métastables ou hors-équilibre, en usant d'actions complexes (voies athermiques), d'environnements complexes (topologie), ou en manipulant la complexité intrinsèqu
Autor:
Chahine, Gilbert, Kityk, Andriy V., Knorr, Klaus, Lefort, Ronan, Guendouz, Mohammed, Morineau, Denis, Huber, Patrick
Publikováno v:
Physical Review E, 81, 031703 (2010)
We report combined optical birefringence and neutron scattering measurements on the liquid crystal 12CB nanoconfined in mesoporous silicon layers. This liquid crystal exhibits strong nematic-smectic coupling responsible for a discontinuous isotropic-
Externí odkaz:
http://arxiv.org/abs/1005.0240
Autor:
Lefort, Ronan, Morineau, Denis, Guégan, Régis, Guendouz, Mohammed, Zanotti, Jean-Marc, Frick, Bernhard
Publikováno v:
Physical Review E: Statistical, Nonlinear, and Soft Matter Physics Vol.78, Issue 4 (2008) 040701
We analyze the molecular dynamics heterogeneity of the liquid crystal 4-n-octyl-4'-cyanobiphenyl nanoconfined in porous silicon. We show that the temperature dependence of the dynamic correlation length ?wall, which measures the distance over which a
Externí odkaz:
http://arxiv.org/abs/0911.5330
Autor:
Busselez, Rémi, Lefort, Ronan, Guendouz, Mohammed, Frick, Bernhard, Merdrignac-Conanec, Odile, Morineau, Denis
Publikováno v:
The Journal of Chemical Physics 131, 21 (2009) 214502
Glycerol and trehalose-glycerol binary solutions are glass-forming liquids with remarkable bioprotectant properties. Incoherent quasielastic neutron scattering (QENS) is used to reveal the different effects of nanoconfinement and addition of trehalos
Externí odkaz:
http://arxiv.org/abs/0901.4006
Autor:
Busselez, Rémi, Lefort, Ronan, Ji, Qing, Guégan, Régis, Chahine, Gilbert, Guendouz, Mohammed, Zanotti, Jean-Marc, Frick, Bernhard, Morineau, Denis
Glycerol and trehalose-glycerol binary solutions are glass-forming liquids with remarkable bioprotectant properties. In this paper, we address the effects of confining of these solutions in straight channels of diameter D=8 nm formed by porous silico
Externí odkaz:
http://arxiv.org/abs/0901.3994
Autor:
Kityk, Andriy V., Wolff, Matthias, Knorr, Klaus, Morineau, Denis, Lefort, Ronan, Huber, Patrick
The optical birefringence of rod-like nematogens (7CB, 8CB), imbibed in parallel silica channels with 10 nm diameter and 300 micrometer length, is measured and compared to the thermotropic bulk behavior. The orientational order of the confined liquid
Externí odkaz:
http://arxiv.org/abs/0810.0509