Olivier Diat

Researcher CEA / Fondamental Research Division
Doctor of Philosophy in Physics

ICSM Deputy director

Scientist in "Ions at Active Interfaces Laboratory" (L2IA)


ICSM/L2IA (Bât. 426)
Site de Marcoule
BP 17171
F-30207 Bagnols-sur-Cèze Cedex
Tel : +33 4 66 33 92 09
e-mail : olivier.diat ad cea.fr


Education and Academic Career

since 2019

2014 - 2023

Deputy Director at ICSM 

Team Leader (L2IA: Laboratory of Ions at Active Interfaces) and Deputy Director at ICSM 

2007 – 2013Team Leader (L2IA and LDD) at ICSM 
1999 – 2007Assistant director (2005 – 2007) and safety engineer of the UMR 5819 – SPrAM "Structure and properties of molecular architectures" (CEA Grenoble)
Scientist in the "Ionic Polymer" group (PCI)
June 2006HDR (Ability to supervise research) in physics: "Structure of self-assembled and multi-scaled system"
1997 – 1998Beamline responsible of the ID2 "high brilliance" at the European Synchrotron Radiation Facility (ESRF) at Grenoble
1993 – 1996Co-responsible of the ID2 "high brilliance" at the European Synchrotron Radiation Facility (ESRF) at Grenoble
In charge of SAXS experimental part under the supervision of Dr P. Bösecke
1992 – 1993Post-doc on ID13 microfocus beamline with Dr C. Riekel as a superviser
September 1992PhD.– Paul Pascal research center (CNRS / Bordeaux) under the supervision of Dr Didier Roux:
« Shear effect on lyotropic phases: Lamellar and sponge phases phases » 
Awarded from the "Société Française de Chimie d'Aquitaine" (June 1992, ENSCPB)
1990 – 1991Teaching – Optical courses (licence level)
1989MSc in fondamental physics (University of Bordeaux I)



Scientific techniques applied to soft condensed matter: polymer, surfactant and lipids in solution, mixed colloidal systems:

  • Small angle x-ray and neutron scattering
  • X-ray and neutron reflectivity
  • Static and dynamic light scattering, second harmonic generation
  • Birefringence, optical microscopy
  • Conductivity, impedencemetry
  • Rheophysics
  • Surface tension

Multiscaled properties of complex fluids, ionic polymeric membrane, ion transfer between fluids.



  • (co)Supervising of 15 thesis + numerous post-doc (>20) and university trainees
  • President of the selection committee of "Soft Matter" at Leon Brillouin Laboratory (ended in 2007). Member of the selection committee of NIST, SOLEIL, and of several Review Panels
  • (co)Organisation of 4 workshops:
    • SONS-Eurocores program "Self-assembled structures of amphiphilic ionic copolymers in solutions and at interfaces" (May 10 – 14, 2005), Arcachon
    • SAXS/SANS’99 (March 11 – 12, 1999), Grenoble
    • SASFlow’98 (Mai 28 – 29, 1998), Grenoble
    • Current Frontiers in Liquid-Liquid Interfaces (Oct 21-23, 2015), ILL Grenoble
    • Co-organizer of "Nano-ions" session at ECIS 2019, Leuven
  • Participation to several ANR (French National Research Agency) projects: MEPHISTO, HYBRID, DVDAME, PAN’H and recently FANTASIC, CATASURF in CD2I, CELADYCT, and ILLA (as PI) DEMETERRES + LabCom "VECT'OLEO" with a small industrial company OLEOS as PI, FOAMEX, PROMENIX, CHAOPOM.



more than 200 papers and 4 patents (+ 21 invited conferences) ; H-index 48 (WoS)

Aqueous solubilization of hydrophobic compounds by inorganic nano-ions: an unconventional mechanism
Ioanna Chazapi, Olivier Diat and Pierre Bauduin
Journal of Colloid and Interface Science, 638 (2023) pp 561-568

How nano-ions act like ionic surfactants.
M. Hohenschutz, I. Grillo, O. Diat and P. Bauduin
Angewandte Chemie, International Edition 59, 21 (2020) 8084-88

Self-assembly of short chain Poly-N-isopropylacrylamid (PNIPAM) induced by superchaotropic Keggin Polyoxometalates:  from globules to sheets.
T. Buchecker, P. Schmid, I. Grillo, S. Prévost, M. Drechsler, O. Diat, A. Pfitzner and P. Bauduin
Journal of the American Chemical Society 141 (2019) 6890−6899

Nanoparticle foam flotation for Caesium decontamination using a pH-sensitive surfactant"C. Micheau, D. Dedovets, P. Bauduin, O. Diat and L. Girard.
Env. Sci. Nano 6 (2019) 1576-1584

Elucidation of the Structure of Organic Solutions in Solvent Extraction by Combining Molecular Dynamics and X-ray Scattering
T. Zemb, M. L. Klossek, T. Lopian, J. Marcus, S. Schöttl, D. Horinek, S. Prevost, D. Touraud, O. Diat, S. Marcêlja and W. Kunz
Angew. Chem. Int. Ed. 53(21) (2014) 5346 – 5350

Lyotropic lamellar phase made of monolayered θ-shaped amphiphiles
D. Brusselle, P. Bauduin, L. Girard, A. Zaulet, C. Viñas, F. Teixidor, I. Ly and O. Diat
Angew. Chem. Int. Ed. 52(46) (2013) 12114 – 12118

Structural evolution during geopolymerization, from early age to consolidated material
P. Steins, A. Poulesquen, O. Diat and F. Frizon
Langmuir 28(22) (2012) 8502 – 8510

A Theta-Shaped Amphiphilic Cobaltabisdicarbollide Anion: Transition From Monolayer Vesicles to Micelles
P. Bauduin, S. Prevost, P. Farràs, F. Teixidor, O. Diat and T. Zemb
Angew. Chem. Int. Ed. 50(23) (2011) 5298

Surfactin Self-Assembles into Direct and Reverse Aggregates in Equilibrium and Performs Selective Metal Cation Extraction
C. Dejugnat, T. Zemb and O. Diat
ChemPhysChem 12(11) (2011) 2138 – 2144

Fuel cells: Proton channels
O. Diat and G. Gebel
Nature Materials 7(1) (2007) 13 – 14

Block-ionomer for fuel cell application
O. Diat and G. Gebel
chapter 15 in Block Copolymers in Nanoscience, Edited by Lazzari, Liu & Lecommandoux, 2006, Published by WILEY-VCH

Review on Neutron and X-ray scattering : suitable tools for studying ionomer membranes
G. Gebel and O. Diat
Fuel Cells 5(2) (2005) 261 – 276

Fibrillar structure of Nafion: Matching Fourier and real space studies of Nafion Films and Solutions
L. Rubatat, G. Gebel and O. Diat
Macromolecules 37 (2004) 7772 – 7783

Influence of screw dislocation on the orientation of a sheared lamellar phase
O. Dhez, N. Nallet and O. Diat
Europhys. Lett. 55(6) (2001) 821 – 826

Small angle X-ray scattering from dynamic processes
O. Diat, T. Narayanan, D. L. Abernathy  and G. Grübel
Current Opinion in Colloid & Interface Science  3(3) (1998) 305-311

High angular resolution camera coupled with an undulator source at the ESRF high brilliance beamline
O. Diat, P. Bösecke and J. Lambard
J. Appl. Cryst. 30 (1997) 862 – 866

Structure of influenza virus haemagglutinin complexed with a neutralizing antibody
T. Bizebard, B. Gigant, P. Rigolet, B. Rasmussen, O. Diat, P. Bösecke, S. A. Wharton, J. J. Skehel and M. Knossow
Nature 376(6) (1995) 92 – 94

Preparation of monodisperse multilayer vesicles of controlled size and high encapsulation rate
O. Diat and D. Roux
J. Phys. II France 3 (1993) 9 – 14