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Thursday 27 Nov 2014Surface modification of carbon materials and their applications

Professor Hyacinthe Randriamahazaka - Chemistry Department, University Paris Diderot, Sorbonne Paris Cite

HAR/170 (3D Visualisation Suite) 14:00-15:00

Carbon materials constitute a large family of diverse structures and textures (carbon fibers, glassy carbons, diamond-like carbons, carbon nanotube, graphene). Applications regarding environmental protection, energy storage and generation, semiconductors, transparent conducting materials, structural materials, biomaterials, chemical sensors, biosensors, catalysis, and photocatalysis, summarize most of the fields in which the presence of carbon materials play an essential role. For these applications, surface chemistry plays a relevant role in the physical and chemical properties of carbon materials. Integration of carbon materials (especially nanocarbons) into other components to design functional or structural materials is a critical issue to transfer the fundamental knowledge into technological applications.

Herein, we will report the surface modification of carbon materials by means of electrografting and electrodeposition [1-4]. The surface and electrochemical properties of these modified surfaces were investigated by combining different techniques. We will present ours recent results on the use of liquid ionic with nanocarbon for energy applications such as actuators and supercapacitors[5-9].

1. Stockhausen V., Ghilane J., Martin P., Trippe-Allard G., Randriamahazaka H., Lacroix J-C.. Grafting oligothiophene on surfaces by diazonium electroreduction: a step toward ultrathin junction with well-defined metal/oligomer interface. Journal of American Chemical Society, 131 (2009) 14920-14927.
2. Fontaine O., Ghilane J., Martin P., Lacroix J-C., Randriamahazaka H.: Ionic liquid viscosity effects on the functionalization of electrode material through the electroreduction of diazonium. Langmuir, 26 (2010) 18542-18549.
3. Ghilane J., Martin P., Randriamahazaka H., Lacroix J-C.: Electrochemical Oxidation of Primary Amine in Ionic Liquid Media: Formation of Organic Layer Attached to Electrode Surface. Electrochemistry Communications, 12 (2010) 246-249.
4. Noel V., Randriamahazaka H.: Redox Assisted Hydrogen-bonding within Interpenetrating Conducting Polymer Networks for Charge-storage Materials. Electrochemistry Communications, 19 (2012) 32-35.
5. Van Bui-Thi-Thuyet, Gaelle Trippe-Allard, Jalal Ghilane, Randriamahazaka H.: Surface functionalization of ferrocene based ionic liquid onto carbon surface using stepwise grafting. Journal of Electroanalytical Chemistry, 713 (2014) 28-31.
6. Maria Gomez-Mingot, Van Bui-Thi-Tuyet, GaelleTrippe-Allard, Jalal Ghilane, Hyacinthe Randriamahazaka, Oxidative Grafting of a Redox-Molecule-Based Ionic Liquid onto an Electrode Surface: Anion Exchange within a Layer, ChemElectroChem, 1 (2014) 1467-1470.
7. Randriamahazaka H., Asaka K.: Electromechanical analysis by means of complex capacitance of bucky-gel actuator based on single-walled carbon nanotubes and an ionic liquid. Journal of Physical Chemistry C, 114 (2010) 17982-17988.
8. Lu L., Liu J., Randriamahazaka H., Chen W.: High Stable Air Working Bimorph Actuator Based on Graphene Nanosheet/Carbon Nanotube Hybrid Composite. Advanced Materials, 24 (2012) 4317-4321.
9. Hyun-Jun-Kim, Randriamahazaka H., Kwon Oh: Highly conductive, capacitive, flexible and soft electrodes baed on a 3D graphene-Nanotube-Palladium hybrid and conducting polymer. Small, (2014) DOI: 10.1002/smll.201401613.

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