Jean-Christophe Valmalette
IM2NP Site de Toulon
Université Sud Toulon Var, Bâtiment R
BP 132
83957 La Garde Cedex
téléphone : + 33 (0) 4 94 14 24 76
fax : +33 (0) 4 94 14 21 68
mail : jean-christophe.valmalette _AT_ im2np.fr
pour plus d'info : http://jcvalmal.univ-tln.fr

Professeur, Université Sud Toulon-Var


Domaines d'activité :
Nanostructuration - propriétés thermo-optiques modulables - effets de tailles et transition de phase - spectroscopie Raman et infrarouge - capteurs micro-catalytiques - synthèse nanoparticules


Publications récentes :

Guinneton F., J.C. Valmalette, J.R. Gavarri.- Nanocrystalline vanadium dioxide : synthesis and mid-infrared properties.- Optical Materials, vol. 15, n° 2, p. 111-114, 2000

Jongen N., P. Bowen, J. Lemaître, J.C. Valmalette, H. Hofmann.- Precipitation of self-organised copper oxalate polycrystalline particles in the presence of hydroxypropylmethylcellulose : control of morphology.- Journal of Colloid and Interface Science, vol. 226, p. 189-198, 2000

Guinneton F., Sauques L. , Valmalette J.C., Cros F. and Gavarri J.R.- Comparative study between nanocrystalline powder and thin film of vanadium dioxide VO2 : electrical and infrared properties.- Journal of Physics and Chemistry of Solids, vol. 62, n° 7, p. 1229-1238, 2001

Guinneton F., Sauques L., Valmalette J.C., Cros F., Gavarri J.R.- Vanadium dioxide switching nanomaterials : role of microstructure on infrared properties.- XVIth Physical Metallurgy and Materials Science Conference on Advanced Materials and Technologies (AMT'2001), Nr 124, Rok XXII, Wrzesien-Pazdzirnik, p. 372-, 2001

Muller C., Valmalette J.C., Soubeyroux J.L., Bouree F., Gavarri J.R.- Structural disorder and ionic conductivity in LiVO3: a neutron powder diffraction study from 340 to 890 K.- Journal of Solid State Chemistry, vol. 156, p. 379-389, 2001

Sanz N., Lomello-Taffin M., Valmalette J.C., Isa M., Galez Ph.- Preparation and characterization of Au/ZrO2 nanoparticles obtained by oxidation of Zr-Au alloy.- Materials Science & Engineering C, vol. 19, n° 1-2, p. 79-83, 2002

Thommerel E., Valmalette J.C., Musso J., Villain S., Gavarri J.R., Spada D.- Relations between microstructure, electrical percolation and corrosion in metal – insulator composites.- Materials Science & Engineering A, vol. 328, n° 1-2, p. 67-79, 2002

Valmalette J.C.- Synthèses et propriétés physicochimiques de matériaux nanostructurés.- Habilitation à diriger des recherches, Université de Toulon, 25 novembre 2002

Valmalette J.C., Isa M.- Size effects on the stabilization of ultrafine zirconia nanoparticles.- Chemistry of Materials, vol. 14, n° 12 , p. 5098-5102, 2002

Valmalette J.C., Isa M., Passard M., Lomello-Tafin M.- Ultra-fast nanostructuring oxidation of crystallized intermetallic ZrAu at 25°C.- Chemistry of Materials, vol. 14, n° 5, p. 2048-2054, 2002

Villain S., Gavarri J.R., Thommerel E., Kopia A., Musso J., Valmalette J.C., Frémy M.A., Nigrelli E., Pischedda M.H.- Electrical percolation, reactivity and degradation in resistor-capacitor composite materials : modeling and predictions.- in "Recent Research Developments in Solid State Ionics", S.G. Pandalai (ed), Transworld Research Network, Trivandrum, India, à paraître, 2002


Thommerel E., Madigou V., Villain S.,  Musso J.,  Valmalette J.C., Gavarri J.R. - Microstructure modifications and  modulated piezoelectric responses in PLZT / Al2O3 composites. - Materials Science & Engineering B, vol. 97, p. 74-82, 2003

Guinneton F., Sauques L., Valmalette J.C., Cros F., Gavarri J.R.- Optimized infrared switching properties in thermochromic vanadium dioxide thin films: role of deposition process and microstructure.- Thin Solid Films, vol. 446, p. 287-295, 2004

Isa M., Valmalette J.C., Muller C., Lomello-Tafin M., Gas P., Elkaïm E. - Study of the nanostructuration of ZrAu alloy near the ambient temperature by synchrotron radiation and thermal analyses.- J. Alloys Compounds, vol. 373, 1-2, p. 96-103, 2004

Moreau J.M., Isa, Chaou A.A., Lomello-Tafin M., Galez P., Jourdan J., Valmalette J.C., Soubeyroux J.L.- Neutron powder diffraction study of the crystal structures of ZrAu.- J. Alloys Compounds, vol. 373, 1-2, pp 16-27, 2004

Guinneton F., Sauques L, Valmalette J.C., Cros F., Gavarri J.R.- Role of surface defects and microstructure in infrared optical properties of thermochromic Vo2 materials.- Journal of Physics and Chemistry of Solids, vol. 66, n° 1, p. 63-73, 2005

Isa M., Valmalette J.C., Muller C., Leroux C.- Evolution in time of a gold-zirconia nanopowder at room temperature : nucleation-growth of gold nanoparticles.- Chemistry of Materials, vol. 17, n° 24, p. 5920-5927, 2005

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