Research departments

MINAMAS


"MINAMAS" TEAM :MIcro-NAno-MAtériaux et Surfaces

(MIcro-NAno-MAterials and Surfaces)


Mini-site

Click here for more information concerning the MINIMAS team.


Group leader

Michel DEVEL

Context

Our MINIMAS team, created in 2006 and restructured in 2014, is staffed by 2 professors, 4 senior lecturers, 2 CNRS researchers, 1 UFC research engineer and a varying number of PhD and postdoc students.


Goals and Research Areas

The general goal of the MINIMAS team is to develop and to provide knowledge on certain types of thin films and nanomaterials, for micro- and nanosystems, or for the production or transduction of energy.

The team’s investigations are focused on the following themes:

› Structuring of metallic thin films and semi-conductors at the micro- and nanometric scales: study and development of materials in the form of nanostructured thin films (multilayered, nanocomposites, nanoarchitectured), with ranges of extended and specific physical properties (typically optical and electrical conduction) in order to connect them to the films’ structural characteristics.

› Mechanosynthesis of intermetallics and characterization of their properties for hydrogen storage: comprehension of absorption and return mechanisms for hydrogen via the nanocrystalline alloys produced by mechanosynthesis, in comparison to their conventional polycrystalline counterparts.

› Piezoelectric materials: chemical engineering of single crystals and development of epitaxial/textured thin films (ZnO, LiNbO3 and LiTaO3) by MOCVD with pulsed injection and cathodic pulverization, for the development of different acoustic, MEMS and optic devices based on electroactive materials (piezoelectric, electro-optic, etc.).

› Study of thermo-electro-magneto-mechanical couplings in nanosystems and solid magnetic materials: flexoelectricity in carbon nanotubes and phase changes in magnetic form-memory alloys (AMF) (development of thin films in Ni-Mn-Ga alloys, development of specific characteristics of single- and polycrystals and propositions of thermo-magneto-mechanical behavior models).


Expertise

› Expertise in development and structuring processes, particularly GLAD, RGPP and PI-MOCVD techniques and
mechanosynthesis;

› Expertise in analysis techniques by Raman spectroscopy, XPS, XRD, SEM/FIB and electrical resistance measures by the Van der Pauw method, both exposed to the atmosphere and in a vacuum;

› Characterization of multiphysics behaviors, particularly electrical, mechanical, electromagnetic and thermodynamic;

› Modeling, forecasts and comprehension of development processes and of the multiphysics behaviors of functional materials, by methods ranging from ab-initio simulations (DFT) to analytical models of the continuous environment type (to the second gradient of deformation in semi-conductors subjected to an electric field), by way of diverse digital methods allowing establishment of the link between the discrete atomistic scale and theories based on the physics of continuous environments.