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Nanoobjects Nanopores

This thematics is focuses on the design, caracterisation and manipulation of individual nanoobjects and nanopores, to understand and modify their own properties, or to use it as test systems in new caracterisation methods and manipulations at the nanoscale.

Our research increasingly links predictive modelling with spectroscopy, based on capability within the PMN to perform optical and electronic spectroscopy and manipulation on individual, isolated nano-objects. In this way the physical properties of the nano-object can be studied with the minimum of interaction with its environment. Spectroscopy is a core transversal competence within our group. We have a strong ongoing activity in Raman spectroscopy, notably multi-wavelength spectroscopy spatially-resolved spectroscopy at sub-wavelength resolution.

Formerly : "Nanostructures-Nanocomposites". Archived articles can be accessed here.

Nanocarbon Design

C. Ewels, J.-L. Duvail, M. Bayle, B. Humbert

The design of new families of nanocarbon materials, from bottom-up approaches (notably for carbon nanorings, CPPs, azafullerenes, and hybrid systems), to chemical and structural modification of existing nanocarbons, such as selective filling of collapsed carbon nanotubes cavities. We are also interested in carbon nanostructure formation processes (such as fullerenes in space), and ways that different nanostructures can be modified (e.g. dislocation cores).

As well as the nanocarbons themselves, we are innovating in ways that nanocarbons can be used as templates, creating previously unknown material phases due to nanoconfinement (for example inside carbon nanotubes).

We rely strongly on computational modelling tools, and local, national and international collaborations.

Other people involved : 
A. Impellizzeri (), Y. Tanuma ().
Keywords : 
Nanocarbon, Fullerene, CPP, Nanotube, Nanoconfinement.

Confined ionic liquids, ionogels

J. Le Bideau, B. Humbert, M. Bayle, C. Ewels

The confinement of ionic liquids allows the properties of ionic liquids to be exploited while benefiting from containment as a solid. The diffusion properties in the resulting nanoporous ionogels (the nanopores seen here as "inverse nanoobjects") are similar to those of liquids. Through the variation of the chemical and topological characteristics of many ionogels, we have broadened our understanding of the behavior at the interface between ionic liquids and host networks by examining the dynamics of the ions, their interactions with each other, as well as their interactions with the host network. We focus on the fundamental understanding of self-organization, anomalous diffusion and surface-liquid interaction in these nanoconfined environments, with technological implications (energy storage and optical devices).

To go further : [Ionogels], [Micro-supercapacitors], [Ionic liquids]

 simu tfsi
Other people involved : 
N. Demarthe (Doc 2020-), M. Deniel (ATER, 2020-2021), T. Guillemin (Doc 2018-), A. Marie (Doc 2017-2020), B. Asbani (CDD 2016-2018), D. Aidoud (Doc 2016-2017), M. Brachet (Doc 2013-2015), C. Cerclier (CDD 2012-2014), A. Lack (CDD 2011-2016), P.-E. Delanoy (Doc 2009-2013)
 Keywords : 
Ionic liquids, diffusion, modeling, energy storage applications

Sub-wavelength optical resolution

B. Humbert, M. Bayle, J.-L. Duvail, C. Ewels

In recent years, the major advances in our knowledge of nano-objects have mainly come from better resolution towards the atomic scale of spectroscopic, microscopic and modelling techniques. Our project revolves around the idea of combining our expertise around these techniques to achieve a complete understanding of the physical properties of individual nano-objects at the atomic scale. This approach strongly mixes experiment and modelling.

To go further : [Super-resolution], [Super-résolution of nanowire]

 hires nanotube
Other people involved : 
A. d'Orlando ()
 Keywords : 
Nano-objects, Plasmonics, Super-resolution.

Characterisation and 3D visualization of nanoporous materials

P. Abellan, C. Ewels

Pores are 3D elements, which require methods of characterisation and visualization in 3D. We perform structural and chemical characterization of porous polymeric materials using 3D reconstructions of focused ion beam/SEM data and study the interactions between these materials and biomolecules. We are also developing  methods of visualization and interaction with 3D objects utilising 3D-visualisation tools such as the holographic desktop display (looking glass factory), VR headsets (Occulus Rift, ...) and dynamic inputs (Kinect, LeapMotion, ...) pores2
Other people involved :   
 Keywords : 
Reconstruction 3D, Visualisation 3D.

Electro-optic nanocomposites

O. Chauvet

Electro-optical polymers (EOP) obtained by dispersing a chromophore in a polymer matrix are of great interest for the development of high performance photonic devices. However, their performance is limited by aging.
As part of Zahraa Jradi's PhD work, we are exploring the effect of adding nanoparticles to EOP to improve performance on the one hand, to reduce the aging effect on the other hand. The polymer chosen is the PMMA / DR1 system. The nanocomposites are formed with TiO2 or BaTiO3 nanoparticles.

To go further : [PMMA/DR1/TiO2 nanocomposites]

Other people involved : 
Z. Jradi ().
 Keywords : 
Electro-optic polymer, nanocomposites.
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