O.R. PEIMN │Elaboration and Integration Process of Nanostructured Materials

Manager : Mehrdad NIKRAVECH

Description

This research operation (R.O.) is based on expertise in the development of functional materials (metal oxides, nitrides and oxynitrides) in the form of nanoparticles supported and integrated in organic matrices and nanostructured thin films. The objective is to develop materials with catalytic, photocatalytic and photonic properties. Three elaboration routes are currently considered according to the energy delivered to the material: soft chemistry (sol-gel process), plasma chemistry (spray-plasma process) and chemistry under extreme conditions (HP-HT-GD processes). The O.R. develops devices to optimize the targeted properties. The control of the elaboration processes requires the development of fundamental knowledge in the science of transfers at the interfaces: gas-liquid for the control of the nucleation and growth phenomena, spray-plasma for the control of the composition. Models are already being developed in collaboration with the THMR RO and other members of the laboratory.

Spray-plasma process (video of Labex SEAM)

Outstanding results

Soft chemistry

Nanocomposites massifs TiO₂-Al₂O₃

Sanchez Mendez M, et al. Photocatalytic activity of nanocoatings based on mixed oxide V-TiO₂ nanoparticles with controlled composition and size. Catalysts 11 (2021) 1457

Sanchez Mendez M, et al. Nucleation and growth of mixed vanadium-titanium oxo-alkoxy nanoparticles in sol-gel synthesis. Colloid Surface A 610 (2021) 125636 (hal-03092613)

Dadi R, et al. Antibacterial activity of ZnO and CuO nanoparticles against gram positive and gram negative strains. Mater. Sci. Eng. C 104 (2019) 109968 

Réacteur chimique à micromélange ultrarapide

Cheng A, et al. Photocatalytic nanoparticulate ZrxTi1-xO₂ coatings with controlled homogeneity of elemental composition. Chemistry Select. 3 (2018) 11118-26

Cheng A, et al. From nanoparticles to bulk crystalline solid: nucleation, growth kinetics and crystallisation of mixed oxide ZrxTi1-xO₂ nanoparticles. Cryst. Eng. Comm. 28 (2017) 3955-65

Plasma chemistry

Rahmani A, Nikravech M. Impact of argon in reforming of (CH4 + CO₂) in surface dielectric barrier discharge reactor to produce syngas and liquid fuels. Plasma Chem. Plasma Process. 38 (2018) 517-34

Baba K, Lazzaroni C, Nikravech M. Growth of ZnO thin films by spray plasma technique: correlation between spectroscopic measurements and film properties. Plasma Chem. Plasma Process. 34 (2014) 1433-46 

Chemistry in extreme conditions

Boyko TD, Zerr A, Moewes A. Tuning the electronic band gap of oxygen-bearing cubic zirconium nitride: c-Zr3-x(N1-xOx)4. ACS Appl. Electron. Mater. 3 (2021) 4768-73

Feldbach E, et al. Defects induced by He⁺ irradiation in γ-Si3N4. J. Lumin. 237 (2021) 118132 (hal-03337229)

Sandeep S, et al. 3D characterization of individual grains of coexisting high-pressure H₂O ice phases by time-domain Brillouin scattering. J. Appl. Phys. 130 (2021) 053104 (hal-03337247)

Xu F, et al. Influence of elastic anisotropy on measured sound velocities and elastic moduli of polycrystalline cubic solids. J. Appl. Phys.130 (2021) 035903 (hal-03411770) (publication commune MÉCAMÉTA/MINOS)

Taniguchi T, et al. Synthesis of cubic zirconium(IV) nitride, c-Zr3N4, in the 6–8 GPa pressure region. Ceram. Int. 45 (2019) 20028-32

Boyko TD, et al. Electronic structure of spinel-type nitride compounds Si3N4, Ge3N4, and Sn3N4 with tunable band gaps: application to light emitting diodes. Phys. Rev. Lett. 111 (2013) 097402

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