MBD Team - Recent results
2D Materials synthesis: h-BN single sheet
The synthesis method, preceramic polymer pyrolysisis is based on the use of molecular precursors to polycondensate as an inorganic polymer. The latter can be used and shaped before forming a ceramic. Coupled with a Spark Plasma Sintering, the teams CIMP and MBD, in collaboration with MATEIS from INSA lyon, realized the synthesis of well-crystallized single sheet h-BN avantagely used for graphene electronic properties.
Reference : Scientific Reports 6 (2016), 20388
Contact : Catherine Journet
Functional materials produced by electrospinning, a step toward biomedical applications
Until 2015, electrospinning used in LMI was mainly dedicated to produce inorganic materials for thermal, electric catalytic and magnetic properties. Since 2016, applications linked to biomedical have been addressed, using electrospinning to produce materials dedicated to bone reconstruction. In the field of tissue ingineering, we combined 3D printing with electrospinning to produce scaffolds for dental and liver implants.
Contact : Vincent Salles
Photochemical properties if mesoporous TiO2 loaded with silver nanoparticles.
We successfully characterized photochromic properties of silver-loaded TiO2 mesoporous film using electrochemistry. Voltammetric methods allowed use to quantify how silver redox potential is modified by a visible light irradiation. These results describe for the first time the effect plasmon induced charge transfer on chemical reactivity. (Figure 3).
Ref : J. Phys. Chem. C 121 (2017), 22147–22155
Contact : Arnaud Brioude, Laurence Bois, Mathieu Maillard, Fernand Chassagneux
Wettability and electro-wettability
Wettability of surface with and without an electric field allowed us to developp several tools to analyze the surface chemistry of hydrophobic coatings.
These methods provide insights on surface polarity, surface energy, a real-time follow up of surface properties immersed in reactive media.
Refs :
- Bonfante, T. Roux-Marchand, M.-C. Audry-Deschamps, L. Renaud, P. Kleimann, A. Brioude and M. Maillard. Polarization mechanisms of dielectric materials at a binary liquid interface: impacts on electrowetting actuation. Phys. Chem. Chem. Phys. 19 (2017), 30139–30146.
- Bonfante, G., Chevalliot, S., Toury, B., Berge, B. & Maillard, M. Two-liquid wetting properties as a surface polarity probe for hydrophobic coatings. Phys. Chem. Chem. Phys. 19 (2017), 3214–3218.
