WorldCat Identities

Pansu, B. (Brigitte)

Overview
Works: 25 works in 37 publications in 3 languages and 115 library holdings
Genres: Conference papers and proceedings 
Roles: Editor, Opponent, Other, Author, Thesis advisor
Publication Timeline
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Most widely held works by B Pansu
International Workshop on Geometry and Interfaces : Aussois, France, September, 17-22, 1990 by E Dubois-Violette( Book )

11 editions published in 1990 in English and Italian and held by 84 WorldCat member libraries worldwide

New investigation on the tetragonal liquid-crystalline phase or SmQ by B Pansu( )

1 edition published in 2004 in English and held by 2 WorldCat member libraries worldwide

Lyotropic lamellar phases doped with polyoxometalates by Andreas-Stavros Poulos( Book )

2 editions published in 2008 in English and held by 2 WorldCat member libraries worldwide

Les systèmes hybrides organiques-inorganiques sont actuellement l'objet d'une grande attention parce qu'ils peuvent combiner les propriétés électroniques des matériaux inorganiques avec les propriétés d'autoassemblage des molécules organiques. Nous avons formulé un tel système, en associant des nanoparticules de polyoxométallates (POMs) avec une phase lamellaire Iyotrope. La diffusion de rayons X et la microscopie en lumière polarisée ont démontré que ce système hybride, très chargé en POMs, est un nanocomposite de structure lamellaire cristal-liquide (La), avec des propriétés viscoélastiques proches de celles des gels. L'interprétation des données de rayons X suggère fortement que les POMs sont localisés près des groupements -OH terminaux du tensio-actif, dans la couche aqueuse. De plus, le système présente du photochromisme réversible, associé à la photoréduction de l'anion polyoxométallate. D'un point de vue plus fondamental, ces matériaux hybrides peuvent servir comme modèles pour étudier les propriétés statiques et dynamiques des nanoparticules confinées dans des phases lamellaires. Ainsi, la diffusion de rayons X a été utilisée pour étudier l'effet du confinement sur le potentiel d'interaction entre les particules. En outre, nous avons mesuré les coefficients de diffusion des particules, en utilisant la RMN en gradient de champ. Nous avons démontré que le coefficient de diffusion est très réduit dans la phase, ce qui confirme la forte interaction entre les particules et la bicouche. Finalement, des expériences simples ont permis l'étude des propriétés rhéologiques du système
ETUDE STRUCTURALE DES PHASES BLEUES SMECTIQUES by Eric Grelet( Book )

2 editions published in 2001 in French and held by 2 WorldCat member libraries worldwide

LES PHASES BLEUES SMECTIQUES (BP S M) SONT DES CRISTAUX LIQUIDES THERMOTROPES ORIGINAUX, DECOUVERTES SUITE A LA SYNTHESE DE NOUVELLES MOLECULES CHIRALES. ELLES APPARAISSENT ENTRE LA PHASE LIQUIDE ISOTROPE ET LA PHASE TGB (A TORSION PAR JOINTS DE GRAIN) QUI CONCILIE DEUX ORDRES ANTAGONISTES QUE SONT LA TORSION ET L'ORDRE SMECTIQUE. CONTRAIREMENT AUX PHASES BLEUES CLASSIQUES, DE TYPE CUBIQUE, QUI PRESENTENT UNIQUEMENT UN ORDRE ORIENTATIONNEL TRIDIMENSIONNEL A GRANDE DISTANCE, LES PHASES BLEUES SMECTIQUES ASSOCIENT DE PLUS UN ORDRE POSITIONNEL (EN COUCHES). CE COUPLAGE ENTRE ORDRE SMECTIQUE ET TORSION EST A L'ORIGINE DE NOUVELLES SYMETRIES OBSERVEES SUR CES PHASES. L'ETUDE EXPERIMENTALE DES PHASES BLEUES SMECTIQUES A ETE REALISEE GRACE A DES TECHNIQUES COMPLEMENTAIRES SONDANT LA STRUCTURE A DES ECHELLES SPATIALES DIFFERENTES : LA DIFFRACTION DES RAYONS X ET LA MICROSCOPIE OPTIQUE POLARISANTE. CES INVESTIGATIONS ONT ETE MENEES SUR DES MONODOMAINES DE BP S M OBTENUS IN SITU PAR CROISSANCE CRISTALLINE DIRECTIONNELLE. EN PARTICULIER, LA CROISSANCE DE MONOCRISTAUX FACETTES A PERMIS DE COUPLER LES SYMETRIES OBSERVEES A CELLES OBTENUES EN RAYONS X. LE RESULTAT EST QUE BP S M2 POSSEDE UNE STRUCTURE ORTHORHOMBIQUE. UNE ETUDE DE L'INFLUENCE DE L'ORDRE SMECTIQUE LOCAL, SELON QUE LES PHASES BLEUES SMECTIQUES SONT SUIVIES D'UNE PHASE TGBA OU TGBC, A REVELE DIFFERENTES STRUCTURES EN BP S M1, RESPECTIVEMENT CUBIQUE ET ORTHORHOMBIQUE. DES MESURES DE L'ACTIVITE OPTIQUE ET DE LA BIREFRINGENCE ONT ETE EFFECTUEES, SOULIGNANT LES POINTS COMMUNS ET LES DIFFERENCES ENTRE PHASES BLEUES CLASSIQUES ET SMECTIQUES. ENFIN, DES DIAGRAMMES DE PHASES ORIGINAUX ONT ETE MIS EN EVIDENCE SUR DES MOLECULES DONT LES LONGUEURS DE CHAINES ALIPHATIQUES PEUVENT VARIER
Structures et propriétés optiques des cristaux colloïdaux minces by B Pansu( Book )

1 edition published in 1984 in French and held by 2 WorldCat member libraries worldwide

This thesis concerns the study of thin layers of colloidal crystals confined between two glass planes in wedge geometry. When the gap thickness increases, one observes a variation of the number of crystalline layers but also a change in the structure of the layers. A model of hard spheres packing enables to interpret this series of structural transitions. On the other hand when observed through an optical microscope by transmission the thin layers show very bright and nice colors due to a phase shift behavior. A simple theoretical model gives forward scattering spectra in good agreement with the experimental ones for 1 and 2 layers
Etude de complexes de nanoparticules et polysaccharides par diffusion de rayons X aux petits angles by Oonagh Mannix( )

1 edition published in 2019 in English and held by 2 WorldCat member libraries worldwide

The macroscopic properties and long-term stability of a colloidal suspension are controlled by its microstructure. Inter-particle interactions determine the microstructure and dynamics of the system. Colloidal systems are often metastable and so the inter-particle correlations can change with time (and so change the microstructure, and macroscopic properties of the system). As smaller colloidal particles can be used to form larger structures with different properties it is necessary to examine a system across various size scales.In this PhD thesis a combination of small and ultra-small angle x-ray scattering (U)SAXS and x-ray photon correlation spectroscopy (XPCS) techniques are used to investigate colloidal complexation across both time and space. Spatial scales from nanometers (si{nanometre}) to microns (si{micrometre}) and time scales from milliseconds (si{millisecond}) to months were examined to elucidate the formation pathway and structural evolution of the complexes. To uncover general mechanisms of broad relevance this work uses technical-grade, non-ideal materials. The study is on the complexation of silica nanoparticles and chitosan, a bio-sourced, cationic polysaccharide.First, a new description for scattering data of polydisperse silica nanoparticles using a fractal model is employed. An investigation into the small-angle scattering of chitosan by neutrons and x-rays, and static light scattering reveals significant differences that are not readily explained. The investigation of nanoparticle and polysaccharide complexes uses kinetic SAXS measurements to study the formation pathways of the complexes, with rapid mixing experiments to access shorter times (stopped-flow apparatus). Combined USAXS and SAXS data are analysed to provide information on the complex structure within a state diagram. Salt was removed from the system using dialysis, and the subsequent behaviour of the system was investigated. It was found that the behaviour of the dialysed system differed to the behaviour of the non-dialysed system over long timescales. In the dialysed system the growth of crystallites of colloidal silica was observed. These results, along with an investigation into the temperature dependency of the system lead to some understanding of the microstructure of this type of colloidal complex
Metallurgy of soft spheres with hard core: From BCC to Frank-Kasper phases by B Pansu( )

1 edition published in 2017 in English and held by 2 WorldCat member libraries worldwide

X-ray scattering by monodomains of blue phases with smectic ordering by B Pansu( )

1 edition published in 1998 in English and held by 2 WorldCat member libraries worldwide

Linking Adhesive Properties and Pore Organisation of Silicone Emulsions Obtained by Reactive Blending by Anaïs Giustiniani( )

1 edition published in 2017 in English and held by 1 WorldCat member library worldwide

Macro-cellular polymers are highly searched-for materials thanks to their rich physical properties. These arise from the internal structuration of the material, in which discrete cells of gas or liquid are tightly packed within a continuous polymeric solid. The size and organization of these cells have an important influence on the overall material properties. The influence of the properties of spheres on their final packing morphology has led to numerous studies usually dealing with either hard frictional or soft frictionless grains, which are the two extremes of the spectrum of possible systems. An important question remains as to what happens for systems which are in-between these extremes, i.e. highly deformable grains presenting a frictional surface. To tackle this problem, we work with a model system of ultra-stable emulsions which consist of PEG (polyethyleneglycol) drops which are dispersed in a continuous phase of PDMS (polydimethylsiloxane). Coalescence of the drops is prohibited by a reactive blending approach which creates a solid-like skin around the PEG drops upon contact with the PDMS. This skin creates adhesion and friction between the drops. To study the influence of the skin properties on the sedimentation of the drops, we characterize the final drop packing under gravity using absorption contrast X-Ray. We show that the presence of friction and adhesion at the interface makes the liquid drops pack unconventionally regarding density and organization compared to classic surfactant stabilized emulsions. We then investigated the adhesive properties of the solid emulsions i.e. elastomers containing liquid drops in their substructure, using a probe-tack test. We studied the impact of the drop size and density on the increase of the bulk's dissipations of energy which enhance the adhesive properties of the material
Écoulement d'un fluide à seuil dans un milieu poreux by Johan Paiola( )

1 edition published in 2017 in French and held by 1 WorldCat member library worldwide

Elastic solids at rest, yield stress fluids flow like a liquid beyond a certain stress. Many industrial applications required the flow of these fluids in porous media, for example: the emulsion flow in oil recovery processes, the cementing operations in the ground, or the cleaning of sludge in a contaminated soil. For many applications, it could be interesting to know the pressure required for a desired flow rate. In such cases, the flow behavior of the fluid is complicated by the complexity of the geometry. The models developed to describe Darcy's law assume a rheological law applied locally, but these models poorly describe this type of flow. Furthermore, complex effects can be added like the wall slip or the thixotropy. In this thesis, we study the flow of carbopol (ETD 2050) through different geometries. First we show that the fluid, for some conditions, corresponds to model yield stress fluids. The experimental protocol used is very important and a thixotropic behavior can appear if it is not respected. This behavior appears especially when the fluid remains below the yield stress, the impact increases with the waiting time. We then compare the flow law obtained by rheometer in a straight channel obtained by microfabrication. We show the importance of the wall slip near the yield stress and the impact on the flow law. Finally, using a new method to measure the velocity fields developed during this thesis, we study the flow of carbopol in a porous medium. This porous medium of 5x5cm is obtained by microfabrication. The mean width of the channels is equivalent to the one of the straight channel. We show the emergence of a channeling flow through some channels of the porous medium. We then compare the flow law of the porous medium to the one obtained in the straight channel. It can be observed that the flow rate is lower in the porous medium than in the straight channel
Directed Assembly of Hybrid Colloids for Optics by Rajam Elancheliyan( )

1 edition published in 2020 in English and held by 1 WorldCat member library worldwide

This thesis is dedicated to finding a new route towards the realization of optical metasurfaces using “bottom-up” approaches based on wet chemistry and self-assembly.In this project, we use an emulsion-based formulation route to synthesize clusters of gold nanoparticles. The formulation route involves emulsifying a suspension of gold nanoparticles in water into an oil phase using adapted surfactants. This step is followed by the controlled evaporation of the water from the droplets under low pressure to confine the nanoparticles in the final clusters. The surface of the gold nanoparticles were previously functionalized in order to retain their surface plasmon resonance properties in the final assembly. The structure of the clusters, precisely their internal gold volume fraction f, is controlled by varying the molar mass and surface density of the grafting polymer. The final structure of the clusters isstudied using small angle x-ray scattering (SAXS), transmission electron microscopy (TEM) and cryogenic transmission electron microscopy (cryo-TEM).The optical scattering properties of the synthesized clusters are studied using a variable angle polarization resolved static light scattering (SLS) setup. The data measured using this setup are analyzed and also compared to theoretical calculations and simulations. The influence of the size R and the volume fraction f of the clusters on their scattering properties is experimentally evidenced using the SLS setup. The presence of electric and magnetic multipoles and their contributions to the scattering properties are experimentally demonstrated. The experimental results are in good agreement with the simulations which indicate that clusters with radius R = 120 nm and volume fraction f higher than 0.3 exhibit exceptional directional scattering properties as expected for Huygens scatterers used for the fabrication of metasurfaces
Microfluidic fabrication of metamaterials out of colloidal dispersions by Sara De Cicco( )

1 edition published in 2020 in English and held by 1 WorldCat member library worldwide

Mécanismes moléculaires de la friction aux interfaces polymères souples by Celine Cohen( )

1 edition published in 2011 in French and held by 1 WorldCat member library worldwide

En dépit de leur importance pratique considérable, et bien que de nombreuses expériences établissent une corrélation certaine entre les hétérogénéités d'interaction de surface (rugosité ou inhomogénéités chimiques) et les propriétés de friction des surfaces, le rôle de ces interactions sur la friction n'est encore pas bien décrit par les modèles et les expériences existants. Dans ce travail de thèse, nous nous sommes intéressés à l'identification des mécanismes moléculaires de la friction aux interfaces polymères souples. Dans ce contexte, nous avons réalisé deux études complémentaires. La première partie du travail concerne le mouvement d'une ligne triple solide-liquide-vapeur qui se déplace sur une surface solide sous l'effet de différentes forces (gravité, forces capillaires et tensions interfaciales), et en particulier le lien entre le piégeage et le dépiégeage de la ligne triple et l'hystérèse de l'angle de contact. Cette méthode permet de mesurer des angles de contact d'avancée et de reculée avec une précision sans précédent (0,1°)et s'avère être particulièrement sensible aux mécanismes qui tendent à ancrer la ligne triple. Ceci en fait un outil de choix pour étudier la friction liquide/solide. Dans la seconde partie du travail, nous avons cherché à comprendre comment des chaînes de polymère flexibles, fortement ancrées sur une surface solide, dans le régime des fortes densités de greffage affectent la friction entre une telle surface et un élastomère réticulé constitué du même polymère. Nous avons montré que le comportement en friction de cette couche confinée suit exactement le comportement rhéofluidifiant observé pour des couches de fondu de masses molaires équivalentes mais avec un temps de relaxation beaucoup plus long que celui des chaînes en fondu,la reptation n'étant pas permise pour les chaînes ancrées. Enfin, en comparant les résultats obtenus pour des couches greffées chimiquement à une extrémité et des couches fortement adsorbées, ayant par ailleurs les mêmes caractéristiques moléculaires (masse molaire des chaînes et épaisseur de la couche ancrée), nous avons mis en évidence que la friction est remarquablement sensible à l'organisation moléculaire au sein de la couche ancrée
Sonder la cinétique d'auto-assemblage de nano-capsules virales à haute résolution spatio-temporelle by Didier Law-Hine( )

1 edition published in 2016 in English and held by 1 WorldCat member library worldwide

Viral assembly is an intriguing topic of biophysics that can be studied using concepts of soft matter physics. Although huge efforts have been made to synthesize hybrid or non-hybrid supramolecular assemblies with viral proteins, the fundamental mechanisms of self-assembly are yet poorly understood. In particular, the kinetic pathway in which the proteins interact with the genome to form highly symmetrical monodisperse architectures are not completely solved.In the first part of this thesis, the Time-Resolved Small-Angle X-Ray Scattering (TR-SAXS) technique is used to probe the kinetics of both self-assembly and disassembly of empty capsids built up from the proteins of the Cowpea Chlorotic Mottle Virus (CCMV). Chemical kinetics models coupled with concepts of SAXS theory are devised in order to extract information about the nature of the reaction intermediates, their structure and their typical lifetime. The encapsulation of ssRNA with CCMV capsid proteins is also examined in this thesis. At neutral pH where the capsid proteins do not spontaneously assemble in vitro into empty spherical capsids, electron microscopy images show that there is a non-negligible population of disordered nucleoprotein complexes that coexist with well-formed spherical viruses. Additionally, TR-SAXS kinetic data suggest that the protein-nucleic acid assembly undergoes a structural reorganization in which the capsid proteins make the nucleoprotein complexes more compact as they simultaneously bind the RNA. Upon acidification, the particles are well-formed viruses as suggested by electron microscopy images. These findings suggest that the encapsulation of RNA into well-formed viruses is likely a two-step assembly with a binding step and an acidification step
Highly structured polymer foams from liquid foam templates using millifluidic lab-on-a-chip techniques by Aouatef Testouri( )

1 edition published in 2012 in English and held by 1 WorldCat member library worldwide

Polymer foams belong to the solid foams family which are versatile materials, extensively used for a large number of applications such as automotive, packaging, sport products, thermal and acoustic insulators, tissue engineering or liquid absorbents. Composed of air bubbles entrapped in a continuous solid network, they combine the properties of the polymer with those of the foam to create an intriguing and complex material. Incorporating a foam into a polymer network not only allows one to use the wide range of interesting properties that the polymer offers, but also permits to profit from the advantageous properties of foam including lightness, low density, compressibility and high surface-to-volume ratio. Generally, the properties of polymer foams are strongly related to their density and their structure (bubble size and size distribution, bubble arrangement, open vs closed cells). Having a good control over foam properties is thus achieved by first controlling its density and structure.We developed a technique in which solid foams are generated essentially in a two-step process: a sufficiently stable liquid foam with well-controlled structural properties is generated in a first step, and then solidified in a second one. With such a two-step approach, the generation of solid foams can be divided into a number of well-separated sub-tasks which can be controlled and optimised separately. The transition from liquid to solid state is a sensitive issue of a great importance and therefore needs to be controlled with sufficient accuracy. It is essentially composed of three key steps: foam generation, mixing of reactants and foam solidification and requires the optimisation of foam stability in conjunction with an appropriate choice of both foaming time and solidification time. Furthermore, a good homogeneity of the polymer foam calls for a good mixing of the different reactants involved in the foaming and the polymerisation.A particularly powerful demonstration of the advantages of this approach is given by solidifying monodisperse liquid foams generated using millifluidic technique, in which all bubbles have the same size. In a liquid foam, equal-volume bubbles self-order into periodic, close-packed structures under gravity or confinement. As such, monodisperse foams provide simultaneous control over the size and the organisation of the pores in the final solid with an accuracy which is expected to give rise to a better understanding of the structure-property relationship of porous solids and to the development of new porous materials.We therefore aim to explore the new spectrum of properties, which polymer foams offer when we introduce an ordered structure into them since the most widely used polymer foams nowadays have disordered structures. The goal of our study is to demonstrate the feasibility of this two-step approach for different classes of polymers, including biomolecular hydrogel, superabsorbent polymer and polyurethane.For the generation of the structured polymer foams we use Lab-on-a-Chip technologies which allow the “shrinking” of large-scale set-ups to micro/millimetic scale. It permits also to perform “flow chemistry” in which the various liquid and gaseous ingredients of the foam are injected and mixed in a purpose-designed network of the micro- and millifluidic Lab-on-a-Chip. We adjust this approach according to the requirements of each polymer system, i.e. the foaming and the mixing techniques are chosen to fit the properties of each system, and can be exchanged to fit the properties of the studied systems
Synthèse et étude des propriétés mésomorphes d'espaceurs pour la fonctionnalisation des nanotubes de carbone by Loïc Louise( )

1 edition published in 2012 in French and held by 1 WorldCat member library worldwide

Synthesis and study of mesomorphic properties of grafts for carbon nanotubes functionalizationIn order to study the toxicity of carbon nanotubes, cholesterol based derivatives were synthesized. Due to their exceptional properties, a wide field of applications is opened for carbon nanotubes. Regarding this field, knowing their toxicity becomes a key issue.The work presented here aims towards the synthesis of chemical derivatives designed to increase interactions between carbon nanotubes and a biological environment. The synthesis of a series of cholesterol derivatives aimed for the functionalization of carbon nanotubes has been developed. Such derivatives are intended to interact with cell membranes.Moreover, many synthetic intermediates have mesomorphic properties. These properties have been studied using different methods such as polarized optical microscopy (POM), differential scanning calorimetry (DSC) and X-ray scattering (MWAXS).HiPco nanotubes have been purified, functionalized and characterized with techniques such as Raman spectroscopy and X-ray diffraction (XRD).Finally, a study of carbon nanotubes toxicity is presented
Flows in foams : The role of particles, interfaces and slowing down in microgravity by Pavel Yazhgur( )

1 edition published in 2015 in English and held by 1 WorldCat member library worldwide

Les mousses liquides sont des dispersions des bulles dans l'eau et elles sont largement utilisées dans un grand nombre de procédés technologiques et d'applications commerciales. Dans ma thèse, je me concentre sur les différents problèmes concernant les propriétés des mousses aqueuses et en particulier les écoulements gravitationnels dans les mousses.Les mousses contiennent une grande quantité d'interfaces couvertes par des molécules amphiphiles, et l'échange des tensioactifs entre l'interface et la phase volumique joue un rôle important pour la génération et la stabilité des mousses. Donc, mon premier projet a été d'étudier la dynamique d'adsorption de systèmes modèles aux interfaces air/eau. Les résultats obtenus nous ont aidés à comprendre comment l'adsorption lente des tensioactifs lors de la génération de la mousse peut influencer la mobilité des interfaces et changer le drainage de la mousse. Pour étudier les différents aspects de la physique de la mousse à l'échelle des bulles, des mousses pseudo-bidimensionnelles (des monocouches des bulles serrées entre deux plaques) sont largement utilisées. Dans ma thèse un modèle pour décrire la géométrie d'une mousse pseudo-bidimensionnelle a été introduit, cette description a été utilisée pour modéliser les conductivités électriques et hydrauliques de ces mousses. Dans certaines applications (par exemple, dans les industries du papier et de la peinture) la formation de la mousse peut causer de graves problèmes et des agents antimoussants appropriés sont utilisés. Dans ma thèse l'influence de la gravité sur l'efficacité antimoussante des gouttes d'huile de silicone a été étudiée expérimentalement en utilisant des vols paraboliques. Les résultats montrent que les particules antimoussantes ont besoin de la gravité pour être transportées d'une manière efficace, et la microgravité rend les antimousses très efficaces pratiquement inutiles. Etant initialement motivé par le transport des particules dans les mousses, j'ai également examiné la sédimentation des particules solides dans les capillaires de verre verticaux et inclinés
Génération et rupture de films liquides minces by Lorène Champougny( )

1 edition published in 2015 in French and held by 1 WorldCat member library worldwide

Source d'émerveillement et d'inspiration poétique, la beauté éphémère des films de savon recèle des questions scientifiques fondamentales, qui ont de nombreuses répercussions pour des applications allant de la formulation des shampoings à la récupération du pétrole. L'objectif de cette thèse est de comprendre comment la vie d'un film de savon, depuis sa génération jusqu'à sa rupture, dépend des propriétés physico-chimiques des tensioactifs qui le stabilisent.Dans une première partie, je m'intéresse à la génération de films savonneux verticaux, que je modélise à l'aide d'un modèle stationnaire supposant des tensioactifs insolubles. Je montre que l'épaisseur de tels films est gouvernée à la fois par la vitesse de génération et l'élasticité de surface du film. Le modèle décrit avec succès les données expérimentales pour des tensioactifs solubles, au moins dans le cas où l'adsorption est lente. Je présente également un dispositif expérimental original permettant de générer des films stabilisés par des tensioactifs insolubles, qui constituent un système modèle prometteur.Dans un second temps, j'étudie l'évolution temporelle - i.e. le drainage et la rupture - de films liquides minces en génération continue, en commençant par le cas simplifié des liquides purs. A l'aide d'une simulation non-stationnaire, je parviens à prédire le temps de vie de films d'huile silicone fonction de la vitesse de génération, qui se montre en accord quantitatif avec les expériences. Je caractérise ensuite expérimentalement le drainage des films savonneux en fonction de différents paramètres - position dans le film, vitesse de génération et humidité ambiante - et montre l'influence de la concentration en tensioactif dTAB et de l'humidité sur le temps de vie du film. Pour terminer, j'explore l'influence de la concentration en tensioactifs sur le drainage et la rupture de bulles hémisphériques flottant à la surface d'un bain savonneux, un système se rapprochant des mousses réelles
Mûrissement et coalescence de mousses liquides by Emilie Forel( )

1 edition published in 2017 in French and held by 1 WorldCat member library worldwide

Graphene oxide sheets confined within anisotropic fluid matrices by Rafael Leite Rubim( )

1 edition published in 2018 in English and held by 1 WorldCat member library worldwide

Since the discovery of graphene oxide (GO), the most accessible of the precursors of graphene, this material has been widely studied for applications in science and technology. The motivation of this work is to study with a fundamental perspective the coupling between amphiphilic bilayers, which can be seen as an anisotropic matrix formed of two-dimensional objects, and another two-dimensional object, namely the graphene oxide sheet when they are dispersed in a common solvent. The competition between the intrinsic elasticities of the bilayers and GO sheets, as well as between direct bilayer-bilayer, bilayer-GO and GO-GO interactions allows us to envisage a rich polymorphism, depending on the composition of the system. Following the development of a dedicated procedure for controlling in an extended range of GO content the binary GO-water system, the confined domain of aqueous GO dispersions was first investigated, and the ternary phase diagram then constructed. The obtained systems have been characterised, using techniques such as optical microscopy, light and x-ray scattering. Elastic and thermodynamic properties have been described by applying, and adapting to the scope of this study, models for two-component lamellar stacks
 
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Alternative Names
Detriche, Brigitte Pansu-

Pansu, B.

Pansu, Brigitte

Pansu-Detriche, Brigitte

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