Commissariat a L'energie Atomique

Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Dominique Porterat

Nathalie Herlin-Boime

Frédéric Schuster

Olivier Sublemontier

Benoit Guizard

Yann Leconte

Francois Tenegal

François Tenegal

Axelle Quinsac

Martine Mayne

Cécile Reynaud

Benoît Guizard

A device for synthesising core-shell nanoparticles by laser pyrolysis is provided. The device includes a reactor having a first chamber for synthesising the core, which is provided with an inlet for a core precursor; a second chamber for synthesising the shell, which is provided with an inlet for a shell precursor; and at least one communication channel between the two chambers for transmitting the core of the nanoparticles to be formed in the first chamber towards the second chamber. The device also includes an optical device for illuminating each of the two chambers, and at least one laser capable of emitting a laser beam intended to interact with the precursors in order to form the core and the shell.

Device for synthesising core-shell nanoparticles by laser pyrolysis and associated method

A system and process for production of nanometric or sub-micrometric powders in continuous flux under the action of laser pyrolysis in at least one interaction zone between a beam emitted by a laser and a flux of reagents emitted by an injector, in which the laser is followed by optical means for distributing the energy of the beam emitted by the latter according to an axis perpendicular to the axis of each flux of reagents, in an elongated cross-section having adjustable dimensions at the level of this at least one interaction zone.

Production of nanometric or sub-micrometric powders in continuous flux

The present invention relates to the synthesis of nanoparticles by laser hydrolysis. For this purpose, a precursor interacts with a laser beam (LAS) in a pyrolysis reactor (REAC) for producing nanoparticles (nP), characterized in that the precursor is firstly in the liquid state and is then converted into the vapor phase and in that the flow rate of the precursor is controlled in the liquid phase.

Synthesis of nanoparticles by laser pyrolysis

Method for preparing carbon nanotubes or nitrogen-doped carbon nanotubes by pyrolysis, in a reaction chamber, of a liquid containing at least one liquid hydrocarbon precursor of carbon or at least one liquid compound precursor of carbon and nitrogen consisting of carbon atoms, nitrogen atoms and optionally hydrogen atoms and/or atoms of other chemical elements such as oxygen, and optionally at least one metal compound precursor of a catalyst metal, in which said liquid is formed under pressure into finely divided liquid particles such as droplets by a specific injection system, preferably a periodic injection system, and the finely divided particles, such as droplets, formed in this way are conveyed by a carrier gas stream and introduced into the reaction chamber, where the deposition and growth of the carbon nanotubes or nitrogen-doped carbon nanotubes take place.

Method and device for depositing carbon nanotubes or nitrogen-doped carbon nanotubes by pyrolysis

Growing community of inventors

Orsay, France

Dominique Porterat