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Frédéric Leroy

37
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Présentation

Introduction ------------ My research is focused on nanoscience and on the use of new in situ and real time experimental methods based on Low Energy Electron Microscopy and X-ray Scattering (synchrotron radiation). The goal is to study out-of-equilibrium surface phenomena at the nanometer scale. For the past 15 years, I have developed the use of in situ Grazing Incidence Small Angle X-ray Scattering to study in Fourier space in particular the self-organization of nanosize clusters and the growth of dendritic facetted structures formed during the dewetting of an unstable thin solid film. For the past 7 years, in situ Low Energy Electron Microscopy have been dedicated to surface modification studies on structural and morphological properties induced by a thermal, a chemical or an electrical stress. This research activity is mainly focused on out-of-equilibrium phenomena, e.g. the solid-solid-vapor triple line dynamics, and on the development of a setup based on holography with low energy electrons. Research carreer ---------------- **1-Mobility** After engineering studies in Physics (Grenoble Institute of Technology) then "Agrégation de Physique", I have done a **PhD at CEA-Grenoble** (2001-2004) under the supervision of Gilles Renaud and Jean-René Régnard. Title: *« Small Angle X-ray Scattering applied to the in situ growth of nanostructures: towards self-organized growth»*. 2004-2005 Post-doctoral position at the Max-Planck for Solid State physics (Stuttgart; resp. K. Kern) on *growth and characterization of two dimensionnal organometallic layers (Scanning Tunneling Microscopy)*. From 2005 to 2016 I was Associate Professor **(Habilitation, 2013)** at Aix-Marseille University. My research was done at the Interdisciplinary Center for Nanoscience of Marseille (CINaM, dir. Frédéric Fagès). **Since 2016 I am full professor**. My research is dedicated to studies on "structure and dynamics of surfaces". **2-Responsabilities** **2018-today** \- **Co-**Head of NanoMaterials Department of CINaM (30 permanent position).**** **2015-2017** \- **Head of NanoMaterials and Reactivity Department of CINaM (20 permanent position). \- Member of directory board of CINaM** (5 department heads and lab director). **2015-2019**: **National coordinator of ANR project HOLOLEEM**. Holographic Low Energy Electron Microscopy (220 k€). **2013-2017**: Member of ANR Project LOTUS. Triple line dynamics, solid-solid-vaccum (500 k€). Coordination of experiments on the triple line dynamics occuring with a chemical reaction. **2009-2015**: **Member of the scientific comittee (review panel) of synchrotron SOLEIL**. Electronic and magnetic properties / surfaces et interfaces. **March 2015**: Co-organisator of conference Surface Science Symp., Les Arcs, Fr. **2009-2011**: **National Coordinator of ANR P-NANO project DEFIS**. Solid state dewetting (800 k€). **2009-2011**: CNRS "delegation" Research project: Thin film dewetting (solid state) by Low Energy Electron Microscopy. **2008-2011**: Elected member of Material Science departement of Université Aix-Marseille 3, Marseille. **2009-2011**: Elected member of CINaM, UMR 7325. **2011**: Member of selection committee "Maître de Conférence" N◦0342 (Univ. Aix-Marseille 3). **2005-2008**: Member of ANR P-NANO project Nanomorphogénèse. **Juillet 2008**: Co-organisator of summer school NanoSteps, Centre CNRS, Cargese, Corse. **2008**: Member of selection committee "Maître de Conférence" N◦0568S publié en 28ème section, Univ. Aix-Marseille 2. **2008**: Member of selection committee " **3-Teaching responsabilities** **2016-today: Responsible for L2 Physics at AMU** **2017-today: Elected member of Physics Department (200 physicists) of UFR Sciences**

Publications

fabien-cheynis
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Rim nucleation and step-train orientation effects in SOI(111) dewetting

Stefano Curiotto , Pierre Müller , Fabien Cheynis , Igor Ozerov , Frédéric Leroy
Surfaces and Interfaces, 2024, 45, pp.103912. ⟨10.1016/j.surfin.2024.103912⟩
Article dans une revue hal-04404851v1
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Size-dependent diffusion of 3D nanovoids in a bcc solid

Stefano Curiotto , Pierre Müller , Fabien Cheynis , Loic Corso , Elodie Bernard
Applied Physics Letters, 2023, 123 (24), pp.241603. ⟨10.1063/5.0175752⟩
Article dans une revue hal-04343886v1
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Early-stage growth of GeTe on Si(111)-Sb

Boris Croes , Fabien Cheynis , Yannick Fagot-Revurat , Pierre Müller , Stefano Curiotto
Physical Review Materials, 2023, 7 (1), pp.014409. ⟨10.1103/PhysRevMaterials.7.014409⟩
Article dans une revue hal-04184850v1
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Automatic Ferroelectric Domain Pattern Recognition Based on the Analysis of Localized Nonlinear Optical Responses Assisted by Machine Learning

Boris Croes , Iaroslav Gaponenko , Cédric Voulot , Olivier Grégut , Kokou D Dorkenoo
Advanced Physics Research, 2022, pp.2200037. ⟨10.1002/apxr.202200037⟩
Article dans une revue hal-03899940v1
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Kinetic Monte Carlo simulations of the diffusion and shape evolution of single-layer clusters on a hexagonal lattice with and without external force

Stefano Curiotto , Pierre Müller , Fabien Cheynis , Frédéric Leroy
Applied Surface Science, 2021, 552, pp.149454. ⟨10.1016/j.apsusc.2021.149454⟩
Article dans une revue hal-03168149v1
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Mechanism of droplet motion and in-plane nanowire formation with and without electromigration

Stefano Curiotto , Pierre Müller , Fabien Cheynis , Frédéric Leroy
Applied Surface Science, 2021, 579, pp.152015. ⟨10.1016/j.apsusc.2021.152015⟩
Article dans une revue hal-03477645v1
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Dynamics of Au-Ge liquid droplets on Ge(1 1 1) terraces: Nucleation, growth and dynamic coalescence

Ali El-Barraj , Stefano Curiotto , Fabien Cheynis , Pierre Müller , Frédéric Leroy
Applied Surface Science, 2020, 509, pp.144667. ⟨10.1016/j.apsusc.2019.144667⟩
Article dans une revue hal-02979162v1
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2D Manipulation of Nanoobjects by Perpendicular Electric Fields: Implications for Nanofabrication

Stefano Curiotto , F. Cheynis , Pierre Müller , Frédéric Leroy
ACS Applied Nano Materials, 2020, 3 (2), pp.1118-1122. ⟨10.1021/acsanm.9b02517⟩
Article dans une revue hal-02499335v1
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Kinetics and coupled dynamics of dewetting and chemical reaction in Si/SiO2/Si system

Frédéric Leroy , D Landru , Fabien Cheynis , O Kononchuk , Pierre Müller
Journal of Materials Science, 2020, ⟨10.1007/s10853-020-05161-w⟩
Article dans une revue hal-03025140v1
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Electric forces on a confined advacancy island

Frédéric Leroy , Ali El-Barraj , Fabien Cheynis , Pierre Müller , Stefano Curiotto
Physical Review B, 2020, 102 (23), ⟨10.1103/PhysRevB.102.235412⟩
Article dans une revue hal-02569097v2
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2D nanostructure motion on anisotropic surfaces controlled by electromigration

Stefano Curiotto , Pierre Müller , Ali El-Barraj , Fabien Cheynis , Olivier Pierre-Louis
Applied Surface Science, 2019, 469 (1), pp.463-470. ⟨10.1016/j.apsusc.2018.11.049⟩
Article dans une revue hal-01889868v2
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Atomic Transport in Au-Ge Droplets: Brownian and Electromigration Dynamics

Frédéric Leroy , Ali El-Barraj , Pierre Müller , Fabien Cheynis , Stefano Curiotto
Physical Review Letters, inPress
Article dans une revue hal-02319455v1
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Dewetting of patterned solid films: Towards a predictive modelling approach

M. Trautmann , F. Cheynis , F. Leroy , S. Curiotto , O. Pierre-Louis
Applied Physics Letters, 2017, 110 (26), pp.263105. ⟨10.1063/1.4990005⟩
Article dans une revue hal-01617089v1
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Interplay between deoxidation and dewetting for ultrathin SOI films

M. Trautmann , F. Cheynis , F. Leroy , S. Curiotto , Pierre Müller
Applied Physics Letters, 2017, 110 (16), pp.161601. ⟨10.1063/1.4980132⟩
Article dans une revue hal-01617080v1

Elastic cost of silicon step rebonding

F. Leroy , Yves Garreau , F. Cheynis , B. Croset , A. Coati
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2016, 93 (4), pp.045416. ⟨10.1103/PhysRevB.93.045416⟩
Article dans une revue hal-01438500v1

Surface diffusion of Au on root 3 x root 3 Si(111)-Au studied by nucleation-rate and Ostwald-ripening analysis

S. Curiotto , F. Cheynis , F. Leroy , Pierre Müller
Surface Science : A Journal Devoted to the Physics and Chemistry of Interfaces, 2016, 647, pp.8-11. ⟨10.1016/j.susc.2015.11.015⟩
Article dans une revue hal-01455008v1

How to control solid state dewetting: A short review

Frédéric Leroy , Lukasz Borowik , Fabien Cheynis , Yann Almadori , Stefano Curiotto
Surface Science Reports, 2016, 71 (2), pp.391-409. ⟨10.1016/j.surfrep.2016.03.002⟩
Article dans une revue hal-01454999v1

Catalytically enhanced thermal decomposition of chemically grown silicon oxide layers on Si(001)

F. Leroy , T. Passanante , F. Cheynis , S. Curiotto , E. B. Bussmann
Applied Physics Letters, 2016, 108 (11), pp.111601. ⟨10.1063/1.4941799⟩
Article dans une revue hal-01455015v1

Self propelled motion of Au-Si droplets on Si(111) mediated by monoatomic step dissolution

S. Curiotto , F. Leroy , F. Cheynis , Pierre Müller
Surface Science : A Journal Devoted to the Physics and Chemistry of Interfaces, 2015, 632, pp.1-8
Article dans une revue hal-01067979v1
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Shape transition in nano-pits after solid-phase etching of SiO2 by Si islands

F. Leroy , Y. Saito , S. Curiotto , F. Cheynis , Olivier Pierre-Louis
Applied Physics Letters, 2015, 106, pp.191601. ⟨10.1063/1.4921091⟩
Article dans une revue hal-01151207v1

In-plane Si nanowire growthmechanis in absence of external Si flux

S. Curiotto , F. Leroy , F. Cheynis , Pierre Müller
Nano Letters, 2015, 15 (7), pp.4788-4792
Article dans une revue hal-01176901v1
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Non equilibrium diffusion of reactive solid islands

F. Leroy , Y. Saito , F. Cheynis , E. Bussmann , O. Pierre-Louis
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2014, 89, pp.235406. ⟨10.1103/PhysRevB.89.235406⟩
Article dans une revue hal-01021099v1

Oxygen-induced inhibition of silicon-on-insulator dewetting

S. Curiotto , F. Leroy , F. Cheynis , Pierre Müller
Applied Physics Letters, 2014, 104, pp.061603
Article dans une revue hal-00975055v1

Combining Low-Energy Electron Microscopy and Scanning Probe Microscopy techniques for Surface Science : development of a novel sample-holder

F. Cheynis , F. Leroy , A. Ranguis , B. Detailleur , P. Bindzi
Review of Scientific Instruments, 2014, 85, pp.043705
Article dans une revue hal-00992919v1

Dynamics and instability of solid-state dewetting

F. Cheynis , Frédéric Leroy , Pierre Müller
Comptes Rendus. Physique, 2013, 14, pp.578-589
Article dans une revue hal-00914737v1
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Growth of Si ultrathin films on silver surfaces: Evidence of an Ag(110) reconstruction induced by Si

R. Bernard , T. Leoni , A. Wilson , T. Lelaidier , H. Sahaf
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2013, 88 (12), pp.121411. ⟨10.1103/PhysRevB.88.121411⟩
Article dans une revue hal-00914746v1

Agglomeration dynamics of germanium islands on a silicon oxide substrate: A grazing incidence small-angle x-ray scattering study

F. Cheynis , Frédéric Leroy , T. Passanante , Pierre Müller
Applied Physics Letters, 2013, 102, pp.161603
Article dans une revue hal-00843737v1

Influence of facets on solid state dewetting mechanisms: Comparison between Ge and Si on SiO2

F. Leroy , F. Cheynis , T. Passanante , Pierre Müller
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2013, 88 (3), pp.035306
Article dans une revue hal-00914731v1

Stress effects on solid-state dewetting of nano-thin films

F. Cheynis , E. Bussmann , F. Leroy , T. Passanante , Pierre Müller
International Journal of Nanotechnology, 2012, 9, pp.396-411
Article dans une revue hal-00696849v1

Dynamics, anisotropy and stability of silicon-on-insulator dewetting fronts

Frédéric Leroy , F. Cheynis , T. Passanante , Pierre Müller
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2012, 85, pp.195414
Article dans une revue hal-00698899v1

Dewetting dynamics of silicon-on-insulator thin films

F. Cheynis , E. Bussmann , F. Leroy , T. Passanante , Pierre Müller
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2011, 84, pp.245439
Article dans une revue hal-00696832v1

Dynamics of solid thin-film dewetting in the silicon-on-insulator system

E. Bussmann , F. Cheynis , F. Leroy , Pierre Müller , O. Pierre-Louis
New Journal of Physics, 2011, 13, pp.043017. ⟨10.1088/1367-2630/13/4/043017⟩
Article dans une revue hal-00603256v1
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Thermal instability of silicon-on-insulator thin films measured by low-energy electron microscopy

E. Bussmann , F. Cheynis , Frédéric Leroy , P. Muller
IOP Conference Series: Materials Science and Engineering, 2010, 12, pp.012016. ⟨10.1088/1757-899x/12/1/012016⟩
Article dans une revue hal-01967071v1