locked59 Intranet

 

 

NANO-OBJECTS AND NANO-MATERIALS

Benoit Angleraud, Aurélie Girard, Agnès Granier, Antoine Goullet, Maryline Le Granvalet, Mireille Richard-Plouet, Pierre-Yves Tessier, Abdel Aziz El Mel (on secondment abroad), Post-doctoral researchers : Quentin Hatte [2919-2020],  Issraa Shahine [2019-2021], PhD student :  Julien Chevet [2021-2024], Simon Chouteau [2020-2023]

PhDs : Adrien Chauvin (2017),  Laetitia Donero (2017), Maria Mitronika (2020)

The combination of plasma for-complex processes with chemical-based approaches opens the way to very great possibilities for synthesis ranging from nanoporous thin layers to nanocomposite layers.
In the first axis ''Nanoporous materials and nano-objects'', solution chemistry can be implemented after plasma treatment in order to obtain a nanostructured layer. The use of specific template substrates is also an interesting possibility to obtain nano-objects.
In the second axis, ''PECVD nanocomposites and chemistry in solution'', chemistry in solution and the plasma process are truly coupled to develop an innovative hybrid process.

Keywords       Thin film nanostructuration, nanobjects, PECVD, plasma diagnostics, plasma-surface interaction

[Nanoporous materilas and nano-objects]
[PECVD hybrid process nanocomposites and chemistry in solution]



 

Nanocomposites by hybrid process coupling PECVD and chemistry in solution

Antoine Goullet, Agnès Granier, Mireille Richard-Plouet
PhDs : Maria Mitronika (Thèse 2020), Simon Chouteau [2020-2023], Julien Chevet [2021-2024]

NANOOBJETS ET NANOMATERIAUX Nanocomposite par procd hybride PECVD et Chimie MireilleThe synergy between the Soft Chemistry and PECVD skills (link to the Thin Film PECVD sub-topic) has made it possible to develop and optimise an innovative hybrid process: consisting of injecting a colloidal solution into a low-pressure plasma. The use of low pressure plasma allows, compared to the approaches developed at atmospheric pressure, a better control and modulation of the energy transfer to the active species (radicals and ions) of the plasma. On the other hand, our specificity consists in using colloidal solutions of nanoparticles, NPs, (link to the sub-theme Chemical deposition of transition metal oxides in Thin Films) prepared in the laboratory, stable in selected organic solvents, to produce nanocomposite thin films (NCs) formed of NPs dispersed in a matrix.
These materials with tunable optical index and dielectric constant are good candidates for the development of optical and electrical Integrated Passive Devices.

Keywords :           Physics of low-pressure plasma, PECVD process and coupling with chemistry in solution, Plasmas diagnostics, Plasma-Surface interactions
Collaborations     LAPLACE (Toulouse), Université de Montréal (Canada), CEITEC (République tchèque)
Expertises            PECVD, Chemistry in solution,  Ellipsometry

To go further 
Nanocomposite by hybrid process       Effect of plasma treatment on TiO2 NPs             Local electrical measurements

Nanoporous materials and nano-objects

Aurélie Girard, Maryline Legranvalet, Mireille Richard-Plouet, Benoit Angleraud, Pierre-Yves Tessier, Abdel Aziz El Mel (on secondment abroad), Post-Doctoral researchers : Quentin Hatte [ 2919-2020], Issraa Shahine [2020-2021]

PhDs: Adrien Chauvin (2017), Laetitia Donero (2017)

NANO OBJETS ET NANO MATERIAUX Matriaux nanoporeux et nano objets PYT

Nanoporous materials: we have shown that the desalloying  of ultrathin layers of gold and copper leads to the formation of nanoporous gold membranes that are easily transferable to any type of support. The team is working on their use in applications of transparent conductors for desalloying  and SERS sensors.
Nano-objects: The team has been developing approaches for the synthesis of nano-objects (nanowires and nanotubes) for several years on direct PVD deposition on template substrates combined with various treatments such as desalloying or the Kirkendall effect  or the conversion. The studies are focused on the understanding of physicochemical mechanisms involved at nanometric scales, on the other hand on the use of these mechanisms for shaping controlled objects at the nanometric scale.

Keywords      nanomaterials, thin films, desalloying, flexible electronics, sensors

To know more             Desalloying             Kirkendall effect               Flexible electronics            SERS sensing


 

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