124 citations · 680 across the 26 of their papers we have counts for
26 papers
Formation and Thermodynamic Behavior of THF-Water Hydrates in Confined Mesoporous Media
Armin Mozhdehei, Oriana Osta, Thomas Marescot +3
Tetrahydrofuran (THF) is a benchmark guest for probing clathrate hydrate thermodynamics because a stoichiometric aqueous solution (THF.17H2O) forms structure-II (sII) hydrate at am…
Colossal Effect of Nanopore Surface Ionic Charge on the Dynamics of Confined Water
Armin Mozhdehei, Philip Lenz, Stella Gries +9
Interfacial interactions significantly alter the fundamental properties of water confined in mesoporous structures, with crucial implications for geological, physicochemical, and b…
Dynamics of type V menthol-thymol deep eutectic solvents: Do they reveal non-ideality?
Claire D'Hondt, Denis Morineau
We have established a comprehensive study of the molecular dynamics of the menthol-thymol mixture, the prototype of the new class of type V deep eutectic solvents. Dielectric spect…
Structure of Water at Hydrophilic and Hydrophobic Interfaces: Raman Spectroscopy of Water Confined in Periodic Mesoporous (Organo)Silicas
Benjamin Malfait, Alain Moréac, Aïcha Jani +4
The temperature dependence of the structure of water confined in hydrophilic mesostructured porous silica (MCM-41) and hydrophobic benzene-bridged periodic mesoporous organosilicas…
Confining deep eutectic solvents in nanopores: insight into thermodynamics and chemical activity
Benjamin Malfait, Aicha Jani, Denis Morineau
We have established the detailed phase diagram of the prototypical deep eutectic solvent ethaline (ethylene glycol / choline chloride 2:1) as a function of the hydration level, in…
Influence of Pore Surface Chemistry on the Rotational Dynamics of Nanoconfined Water
Benjamin Malfait, Aicha Jani, Jakob Benedikt Mietner +4
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 spe…
A decatungstate-based Ionic liquid exhibiting very low dielectric constant suitable for acting as solvent and catalyst for oxidation of organic substrates
Yohan Martinetto, Bruce Pégot, Catherine Roch +7
In this contribution, a new POM-based ionic liquid, namely (P6,6,6,14)4[W10O32], was fully characterized. Its viscosity and its very low dielectric constant make this hybrid ionic…
On the Coupling between Ionic Conduction and Dipolar Relaxation in Deep Eutectic Solvents: Influence of Hydration and Glassy Dynamics
Aicha Jani, Benjamin Malfait, Denis Morineau
We have studied the ionic conductivity and the dipolar reorientational dynamics of aqueous solutions of a prototypical deep eutectic solvent (DES), ethaline, by using dielectric sp…
Dynamics of Water Confined in Mesopores with Variable Surface Interaction
Aicha Jani, Mark Busch, J Benedikt Mietner +8
We have investigated the dynamics of liquid water confined in mesostructured porous silica (MCM-41) and periodic mesoporous organosilicas (PMOs) by incoherent quasielastic neutron…
High-resolution dielectric study reveals pore size-dependent orientational order of a discotic liquid crystal confined in tubular nanopores
Sylwia Calus, Andriy V. Kityk, Lech Borowik +6
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 a…
Thermotropic Orientational Order of Discotic Liquid Crystals in Nanochannels: An Optical Polarimetry Study and a Landau-de Gennes Analysis
Andriy V. Kityk, Mark Busch, Daniel Rau +10
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 me…
Criticality of an isotropic-to-smectic transition induced by anisotropic quenched disorder
Gilbert Chahine, Andriy V. Kityk, Klaus Knorr +4
We report combined optical birefringence and neutron scattering measurements on the liquid crystal 12CB nanoconfined in mesoporous silicon layers. This liquid crystal exhibits stro…
Relation between static short-range order and dynamic heterogeneities in a nanoconfined liquid crystal
Ronan Lefort, Denis Morineau, Régis Guégan +3
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 dyna…
Molecular dynamics of glycerol and glycerol-trehalose bioprotectant solutions nanoconfined in porous silicon
Rémi Busselez, Ronan Lefort, Mohammed Guendouz +3
Glycerol and trehalose-glycerol binary solutions are glass-forming liquids with remarkable bioprotectant properties. Incoherent quasielastic neutron scattering (QENS) is used to re…
Continuous Paranematic-to-Nematic Ordering Transitions of Liquid Crystals in Tubular Silica Nanochannels
Andriy V. Kityk, Matthias Wolff, Klaus Knorr +3
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 ther…
Incoherent Quasielastic Neutron Scattering Study of Molecular dynamics of 4-n-cyano-4'-octylbiphenyl
Ronan Lefort, Denis Morineau, Régis Guégan +4
We report incoherent quasielastic neutron scattering experiments on the thermotropic liquid crystal 4-n-cyano-4'-octylbiphenyl. The combination of time-of-flight and backscattering…
Rich polymorphism of a rod-like liquid crystal (8CB) confined in two types of unidirectional nanopores
Régis Guégan, Denis Morineau, Ronan Lefort +5
We present a neutron and X-rays scattering study of the phase transitions of 4-n-octyl-4'-cyanobiphenyl (8CB) confined in unidirectional nanopores of porous alumina and porous sili…
Sliding and translational diffusion of molecular phases confined into nanotubes
Rémi Busselez, Claude Ecolivet, Régis Guégan +5
The remaining dynamical degrees of freedom of molecular fluids confined into capillaries of nano to sub-nanometer diameter are of fundamental relevance for future developments in t…
Molecular dynamics of a short range ordered smectic phase nanoconfined into porous silicon
Régis Guégan, Denis Morineau, Ronan Lefort +5
4-n-octyl-4-cyanobiphenyl (8CB) has been recently shown to display an unusual sequence of phases when confined into porous silicon (PSi). The gradual increase of oriented short-ran…
Structure and relaxation processes of an anisotropic molecular fluid confined into 1D nanochannels
Ronan Lefort, Denis Morineau, Régis Guégan +3
Structural order parameters of a smectic liquid crystal confined into the columnar form of porous silicon are studied using neutron scattering and optical spectroscopic techniques.…
Dynamics of 8CB confined into porous silicon probed by incoherent neutron backscattering experiments
Régis Guégan, Ronan Lefort, Wilfried Béziel +3
Confinement in the nanochannels of porous silicon strongly affects the phase behavior of the archetype liquid-crystal 4-n-octyl-4-cyanobiphenyl (8CB). A very striking phenom- enon…
First evidence of anisotropic quenched disorder effects on a smectic liquid crystal confined in porous silicon
Régis Guégan, Denis Morineau, Claude Loverdo +2
We present a neutron scattering analysis of the structure of the smectic liquid crystal octylcyanobiphenyl (8CB) confined in one-dimensional nanopores of porous silicon films (PS).…
Structure of liquid and glassy methanol confined in cylindrical pores
Denis Morineau, Regis Guegan, Yongde Xia +1
We present a neutron scattering analysis of the density and the static structure factor of confined methanol at various temperatures. Confinement is performed in the cylindrical po…
Methyl group dynamics in a confined glass
A. J. Moreno, J. Colmenero, A. Alegría +4
We present a neutron scattering investigation on methyl group dynamics in glassy toluene confined in mesoporous silicates of different pore sizes. The experimental results have bee…