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Chimie de la Matière Condensée de Paris (Collège de France et Jussieu)

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(Photo personnelle)

David Grosso 

(Professor)

Laboratoire de Chimie de la Matière Condensée de Paris
Université Pierre et Marie Curie (Paris VI)
4 place Jussieu, Tour 54, E. 5, C 54-55
75252 Paris CEDEX 05 Case Courrier 174
France

téléphone +33 1 44 27 55 42
fax +33 1 44 27 47 69
email david.grosso[at]upmc.fr

 

ATF : Adanced Thin Films

Service for processing and analyses of films

For details see

FRANCAIS

ENGLISH

David Grosso is born in 1970 in the centre of France. He is married and spends most of his free time looking about his two little daughters Emma and Charlotte.

After his graduation in 1994, he moved to London (UK) where he spent 2 years working first as a "chef" in a restaurant, then as a technician in optical glasses confection, and finally as a demonstrator at the University of Kingston. His Ph.D. work was financed by Atomic Weapon EStablishment and he defended his thesis in 1999 at the University of Surrey. After 18 months spent as a Post-doctoral fellow for Philips, he became assistant professor at the University of Paris VI in 2001. In 2007, he obtained the position of full professor in the Laboratoire Chimie de la Matière Condensée de Paris (LCMCP). 

 Evaporation Induced Self Assembly

 

His research activities, mainly developped in close colaboration with Clément Sanchez, Cédric Boissière and L. Nicole, are mainly dedicated to the elaboration of nanostructured materials (coatings, particles and patterns) through Evaporation Induced Self-Assembly (Activity I). He likes to use in situ time–resolved synchrotron-SAXS investigations to assess the phenomena involved during their elaboration processes (Activity II). He has also developed innovative techniques for thin film characterization using Ellipsometry (Activity III). For the future, he would like to carry on the latter studies so as to propose and gather more and more “bottom-up” methods for the fabrications of nano materials and devices for various applications (Activity IV).

His is co-author of around 95 articles and reviews, and has been invited in 12 international conferences. He has 10 patents, and has been granted the Donald. Ulrich Award for outstanding contribution in basic and applied science by the International Sol-Gel Society (Los Angeles 2005).

 
 

 


ACTIVITY I : Elaboration of nanostructured and mesoporous films, micro-spheres, and patterns by Evaporation-Induced-Self-Assembly.

 

CORRESPONDING REVUES

 

A : Ultra low refractive index and dielectric constant coatings.

Nanocrystalline magnesium oxyfluoride films, bearing vesicle-like mesopores, have been prepared using an easy, surfactant free, CSD. The remarkable low refractive index (n=1.09 at 700nm) and dielectric constant (k = 1.6 at 100KHz) properties are attributed to the very high porosity created during decomposition of the perfluoroacetate ligands.

 

B : Inorganic/inorganic Nanostructured Patternings (INP).

Nanocrystalline Highly ordered Al2O3, TiO2 or ZrO2 nano-patternings have been deposited on Si, glass, ITO, or Au substrates using E.I.S.A. in presence of PS-PEO copolymers. Such novel nano-structured heterogeneous surfaces gather the properties of the pattern matrix and that of the substrate surface since the latter is accessible through the nano motifs.

 

C : Mesoporous (organically modified) silica optical coatings.

An EISA method leading to high quality mesoporous SiO2 thin films, exhibiting various structures (L, 2D-Hex, 3D-Hex, Cubic), porosities (20-60% vol and pore size 2-10 nm), thicknesses (20-1000nm), are reported. Ti, Zr, Al can be incorporated into the matrix, while the surface functionality can be adjusted by grafting o specific groups on the porosity surface.

D : Crystalline nanostructured oxide coatings

50 – 1000 nm thick, highly ordered mesoporous, optical films are prepared by combining the sol-gel chemistry, the EISA approach and CSDs processes. Crystallisation of the inorganic network (i.e. TiO2, Al2O3, ZrO2, SrTiO3, MgTa2O6, NiTiO3, HfO2…) is achieved without
mesostructure collapsing


 

E : Mesoporous nanocrystalline oxide spheres.

Aerosol generated E.I.S.A. titania, zirconia or alumina mesostructured micro-spheres have been prepared in presence of PEO-based block copolymers by atomisation. Crystallisation was achieved without  collapsing of the mesoporosity by a careful thermal treatment. The
mesoorder was found to play an important role in the involved kinetics.  

 

F : Multimodal mesoporous silica micro-spheres.

Aerosol generated E.I.S.A. silica mesostructured spheres are interesting materials for catalysis, drugg delivery, therapeutic vectoring, or in separation. Various structures (2DHex, cubic, hierarchical), porosities (from macro to micro) have been combined to design original multimodal objects.

 

ACTIVITY II : In situ time-resolved SAXS analyses of Self-Assembly Induced by Evaporation and crystallisation associated to mesoporous materials.

 

 

A : In situ simultaneous SAXS / Interferometry investigations of Evaporation-Induced-Self-Assembly during dip-coating.

The Austrian SAXS line (Elettra Synchrotron) was used to investigate self-assembly of sol-gel precursors (SiO2 and TiO2) with micelle templates during chemical solution deposition. Simultaneous interferometry analysis was conducted. This study revealed the complexity of the mechanism with the critical role of the atmosphere composition.

 

B : In situ simultaneous SAXS / WAXS investigations of mesoporous oxyde coating crystallisation during thermal treatment.

The Austrian SAXS/WAXS line (Elettra Synchrotron) was used to follow the crystallisation of metal oxide (TiO2, Al2O3, CeO2, SrTiO3…) mesoporous thin films during high temperature treatment. It revealed that crystallisation can be accompanied by a transformation into the grid-like structure and can be controlled so as to prevent collapsing of the mesostruture.

 

C : In situ  SAXS investigations of Evaporation-Induced-Self-Assembly during aerosol generation.

The Austrian SAXS line (Elettra Synchrotron) was used to investigate self-assembly of sol-gel precursors (SiO2 and TiO2) with micelle templates during aerosol generation of submicronic particles in air. It confirmed the critical role of the temperature of evaporation
that allows adjusting the water composition during EISA.

  • First in situ SAXS studies of the mesostructuration of spericalsilica and titania particles during spray-drying process. C. Boissière, D. Grosso, H. Amenitsch, A. Gibaud, A. Coupé, N. Bacille, C. Sanchez, Chem. Comm., 22 (2003) 2798.




ACTIVITY III : specific ellipsometric EEP and TEA analyses of thin films.

 

 

A : Environmental Ellipsometric Porosimetry (EEP)

In situ Spectroscopic Ellipsometry analysis of thin porous layers is used to measure the variation of refractive index and thickness during water chemisorption and condensation into the porosity. The resulting isotherms are then modelled to extract porosity, pore size distribution, homogeneity and transversal mechanical compressibility.

Analysis can be perform for external laboratory : see ATF

 

B : Thermal Ellipsometry Analysis (TEA)

In situ Spectroscopic Ellipsometry analysis of thin layers is used to measure the variation of refractive index and thickness during thermal treatment. The resulting evolutions are then used to assess phenomena such as densification, organic decomposition, crystallisation and
sintering. Kinetic parameters can be extracted from the plots. 

Analysis can be perform for external laboratory : see ATF



 

ACTIVITY IV : Applications as fuel and photovoltaic cells, sensors, catalysis...

TiO2-based Photovoltaic cells and photocatalytic devices

 Mesoporous thin films as sensors

Mesoporous materials for catalysis

Biologically relevant applications

 

 

 

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