Directory

Function:

Doctoral student

Main research themes:

PVD deposition, HiPIMS and e-HIPIMS processes, thin films, micro-supercapacitors

Current research project:

Doctoral thesis on the deposition of thin-film electrodes by high-power pulse magnetron sputtering (HiPIMS) for the production of 3D micro-supercapacitors.

Activities in the research community :

Secretary of IMN’s SYRA doctoral students’ association

Biography:

With a Master’s degree in Innovative Materials and Energy Systems, I did my end-of-studies internship at STMicroelectronics in Tours, where I worked on optimizing an etching process for TaN/SiN/TaN capacitors. Currently a PhD student at the Institut des Matériaux Jean Rouxel in the PCM team, my work focuses on the development of electrodes for 3D micro-supercapacitors, using high-power pulse sputter deposition techniques (HiPIMS) and its enhanced variant e-HiPIMS. The aim of this thesis is to optimize the structuring, compliance and electrochemical performance of electrodes (TiN, VN/VOxNy) on 3D substrates to meet high-density energy storage needs in miniaturized systems.

Link to orcid : https://orcid.org/0009-0004-5564-3959

LinkedIn link : https://www.linkedin.com/in/l%C3%A9o-seigneur-32525a223/

Professor

Current functions / Current

• Full Professor
• Director of the Materials Department at Polytech Nantes

Qualifications

• ENSICAEN Materials Engineer (1993)
• DEA (Master) in Materials, University of Caen (1993)
• PhD, University of Caen (1997)
• HDR, University of Nantes (2006)

Research topics (Research Themes)

• Combinatorial metallurgy, microstructure engineering, multi-objective alloy design and optimization (genetic algorithms), modeling and prediction of alloy properties (physical metallurgy, data mining using neural networks and Gaussian processes, predictive thermodynamics of phase diagrams, CALPHAD / Thermo-Calc, diffusion, Dictra).
• Thermomechanical behavior (resistance to heat and creep), oxidation, corrosion, hydrogen embrittlement.
• Hot forming metallurgy, welding and additive manufacturing metallurgy, weldability.
• Nickel alloys (superalloys), titanium alloys, high-entropy alloys (HEA) and complex concentrate alloys (CCA).
• Metallic alloys and coatings for nuclear, aeronautical and automotive applications…
• Relationships between manufacturing, microstructure and mechanical properties.

Animation de la recherche (Research Community Activities / Teaching Responsibilities)

• Board member, Réseau National de la Métallurgie (RNM)
• Board member of GDR IAMAT (Artificial Intelligence in Materials Science)
• Member of the Board of the FAISTOS Cluster (Fostering Artificial Intelligence in industrial Systems and TechnOlogieS) of Nantes Université / Next

Associate Professor

Current / Functions Currently

• University Lecturer in Nantes University
• Researcher at IMN Institute

Qualifications

• PhD in Physical Chemistry (2000)
• Engineer in Chemistry from Rennes School (1996)

Themes de recherche / Research Themes

• Physico-chemical characterization of inorganic food additives (TiO2, silver, calcium phosphates…) and determination of their fate in the gastro-intestinal tract
• Comprehensive study of the interactions between TiO2 and biomolecules / phosphated molecules
• Synthesis and characterization of photosensitive sols and gels based on titanium oxides for the conception of solar cells and photobatteries
• Characterization of colloidal suspensions through size and zeta potential measurements

Animation de la recherche / Research Community Activities – Teaching Responsibilities

• Head of the first year of Master A3M (Analysis, Molecules, Materials, Medicines)

Publications

• 25 publications in international peer reviewed journals, 1 patent
• Since 2006, 34 oral conference presentations

Ressources en ligne / Online Resources

Researchgate : https://www.researchgate.net/profile/Helene-Terrisse

ORCID: 0000-0002-9338-6939

Emeritus University Professor

Function:

Doctoral student in materials science under the supervision of Marie-Paule Besland

Qualifications :

• Master of Science in Advanced Materials Engineering (2023)
• Engineering degree in Materials Engineering (2021)
• DEUG in material science and chemistry (2018)

Expertises :

• Materials characterization techniques (Scanning Electron Microscopy, X-ray Diffraction, Raman Spectroscopy, Atomic Force Microscopy, Focused Ion Beam (FIB) for sample preparation.
• Thin film deposition
• Electrochemical characterization techniques
• Micro-batteries
• Photovoltaic cells

Main research theme :

Thin-film sputter deposition for electrode applications in micropower batteries.

Current research project:

Development of perovskite structure layers by sputtering for use as electrodes in micropower batteries.

Biography:

I’m currently working on the deposition of thin films by magnetron co-sputtering as part of the development of energy storage devices, in particular micro-batteries and supercapacitors.

Teaching :

Practical work on materials characterization

Function:

CNRS Research Engineer, HDR

Qualifications:

Doctorate in Materials Science, Engineer from Ecole Centrale de Nantes

Expertises:

• Mott insulators
• Thin films
• Electrical testing

Main research theme:

Study of the insulator-metal transition in thin-film Mott insulators for microelectronics applications

Biography:

• Current research projects: Mott-IA Regional Academic Research Demonstrator Project, ANR FASTRAIN, IPCEI ME-CT Mott-IMC
• Activities in the research community (committee member, network…) : Coordinator of IMN’s PLASSMAT platform
• Award: SFP Grand Prix Felix Robin 2023

Publications and patents :

• Propagating insulator-to-metal transition in the wake of photoinduced strain waves in a Mott material, Nature Physics 2024, https://doi.org/10.1038/s41567-024-02628-4
• Enhancing the Resistive Memory Window through Band Gap Tuning in Solid Solution (Cr1-xVx)2O3, ACS Appl. Mater. Interfaces 2023, https://doi.org/10.1021/acsami.3c09387
• A Leaky-Integrate-and-Fire Neuron Analog Realized with a Mott Insulator. Adv. Funct. Mater. 2017.https://doi-org.inc.bib.cnrs.fr/10.1002/adfm.201604740
• Patent “Use of Mott insulators in neuromorphic networks” 2014
• Resistive Switching in Mott Insulators and Correlated Systems. Adv. Funct. Mater. 2015, https://doi-org.inc.bib.cnrs.fr/10.1002/adfm.201500823
• Deposition of GaV4S8 thin films by H2S/Ar reactive sputtering for ReRAM applications, J Phys D Appl. Phys. 2014, DOI 10.1088/0022-3727/47/6/065309

Link to orcid: https://orcid.org/0000-0003-4508-954X

Link to scholar.google.fr: https://scholar.google.com/citations?user=vMqkta8AAAAJ&hl=fr

CNRS Research Fellow

Function:

CNRS researcher, HDR

Main research theme :

Radical chemistry

Current research projects :

• RADICO: µs measurement of the carbonate radical (CO3°-) at the solid/solution interface
• FRICKE POUR TOUS: Quantification of oxidative radicals produced by photolysis, sonolysis, radiolysis….

Publications:

Physico-Chemistry

Terfas, S.; Blain, G.; Craff, E.; Koumeir, C.; Haddad, F.; Poirier, F.; Delpon, G.; Vandenborre, J. Oxygen Dependence on Hydrated Electron Yields: Pulsed Radiolysis Studies Using Proton Beams. J. Phys. Chem. A 2025, 129 (22), 4861-4869.

Geosciences

Lefeuvre, N.; Truche, L.; Donzé, F.-V.; Vandenborre, J.; Gaucher, E. C.; Magnin, V. The Contribution of Mechanoradical Reactions to Crustal Hydrogen Generation. Earth and Planetary Science Letters 2025, 660, 119363.

Health

Blain, G.; Vandenborre, J.; Villoing, D.; Fiegel, V.; Fois, G. R.; Haddad, F.; Koumeir, C.; Maigne, L.; Métivier, V.; Poirier, F.; Potiron, V.; Supiot, S.; Servagent, N.; Delpon, G.; Chiavassa, S. Proton Irradiations at Ultra-High Dose Rate vs. Conventional Dose Rate: Strong Impact on Hydrogen Peroxide Yield. Radiation Research 2022, 198 (3), 318-324.

Energy

Vandenborre, J.; Guillonneau, S.; Blain, G.; Haddad, F.; Truche, L. From Nuclear Waste to Hydrogen Production: From Past Consequences to Future Prospect. International Journal of Hydrogen Energy 2024, 64, 65-68.

Link to publi HAL: 102697930
Link to orcid: 0000-0002-7718-7120

Current functions Currently

• IMN IT Manager (UMR6502 – Nantes – 80%)
• RSSI-Région adjoint – Délégation Régionale du CNRS (DR17 – Rennes – 20%)

Previous functions / Before

• 2002 – 2020 : IT Department Manager (CEMHTI – CNRS – Orléans)
• 2003 – 2020: Part-time lecturer in Licence Pro. Networks and Telecommunications, specializing in Web and Mobile Development (IUT Orléans)
• 2000 – 2002 : Resp. Info. Office Automation (VALEO VECS – Meung/Loire)
• 1998 – 1998: Research contract (GREMI/CRMD – Orléans)

Enseignement – Teaching

• 2003 – 2020 : Linux administration level I (security, bash scripting …)
• Microsoft domain administration (AD 2016, GPO …)
• LDAP directory (classes, LDIF, queries, directory schema, etc.)
• Apache server (virtual host configuration, certification authority, encryption, etc.)
• Network (routing, network sub-division, IP V6 …)
• Virtualization (VSphere, HyperV, iSCSI, SAN …)

Training

• 1999 – 2000: DESS (post-graduate diploma) in computer science
• 1994 – 1997: PhD – Plasma physics

Ressources en ligne – Online resources

• ISI ReseacherId: C-1684-2008
• HAL Id : francois-vivet
• ORCID Id : ORCID iD iconorcid.org/0000-0002-3917-5647

Position:

• Since October 2026: CNRS researcher (CR Section 17)
• 2025–2026: CNRS postdoctoral fellow in chemistry at IMN (Electrochemical Storage and Transformation of Energy group – ST2E)
• 2023-2025: Postdoctoral researcher at the University of Oxford (Hayward group)

Qualifications:

2023: PhD from the University of Bordeaux. Thesis titled “Crystal chemistry and redox mechanisms of vanadium phosphates and Prussian blue analogues for K-ion batteries” carried out under the supervision of Dr. Laurence Croguennec (ICMCB), Prof. Dany Carlier (ICMCB) and Dr. Laure Monconduit (ICGM).

Expertise:

• Synthesis of inorganic materials
• crystal chemistry
• X-ray and neutron diffraction
• X-ray absorption spectroscopy and redox mechanisms
• Electrochemical characterisations.

Biography:

After graduating from the University of Bordeaux with a degree in solid-state chemistry applied to battery electrode materials (January 2023), I moved to the University of Oxford to work in Mike Hayward’s group as a postdoctoral research assistant. During that time, I investigated anionic intercalation chemistry in Ruddlesden-Popper compounds. I developed and applied sequential topochemical anion insertion-deinsertion reactions of fluoride ions in oxide-based frameworks to tailor the transition metal’s electron count, local coordination, and magnetic properties.

After moving back home to Nantes in September 2025, I joined the Electrochemical Storage and Transformation of Energy group, specifically the “high-power batteries” team. My research interests focus on the design of new oxide negative electrode materials for fast-charging batteries. I am interested in understanding how crystal structures and the nature of chemical bonds determine the properties of inorganic solids, and in gaining insight ranging from the microscopic scale—using local probes—to the long-range scale—using diffraction techniques.

Prizes:

• Battery Young Researcher Award from the Battery Innovation Days (Novembre 2023, Bordeaux) European jury.
• Best Thesis Award (2022-2023) from Société Chimique de France section Aquitaine (April 2023, Bordeaux).

Link to orcid : https://orcid.org/0000-0002-5073-4008

Link to scholar.google.fr : https://scholar.google.fr/citations?user=_zZGv-YAAAAJ&hl=fr