Synthesis of SiC Nanoparticles and Optical Properties

Nathalie C. Herlin-Boime 1Johann Boucle 2

1. CEA, SPAM, France
2. Universite du Maine, LPEC CNRS-UMR 6087, Av. O. Messiaen, Le Mans 72085, France

Abstract


SYNTHESIS OF SiC NANOPARTICLES AND OPTICAL PROPERTIES
N. Herlin-Boime1, J. Vicens2, J. Bouclé1+3, F.Ténégal1, A. Kassiba3
1) Service des Photons, Atomes et Molécules, Laboratoire Francis
Perrin (CEA-CNRS URA2453), DSM - CEA-Saclay, Bt 522, 91191 F
Gif/Yvette Cedex, 2) LERMAT, FRE CNRS 2149, ISMRA 6, boulevard
Maréchal Juin, 14050 Caen Cedex, France,3) Laboratoire de Physique de
l'Etat Condensé - UMR-CNRS N6087, Faculté des Sciences - Université
du Maine Avenue O.Messiaen 72085 Le Mans Cedex 09 -France
SiC nanopowders were obtained in a flow reactor by the CO[2] laser
pyrolysis method from a gaseous mixture. Molecules are dissociated
after absorption of the laser radiation and collisional energy
transfer. Nucleation of nanoparticles occurs in a flame. The flame
temperature is fixed by the laser power. In this presentation, the
effect of laser power between 200 and 750 W (850-1100C) is discussed.
TEM observations have revealed that whatever the temperature, the
powders are composed of grains of about 10 nm diameter, these grains
are amorphous at low temperature and contain an increasing number of
nanocrystals (2 nm diameter) when the temperature increases.
The desagglomeration and dispersion of the SiC nanoparticles was
studied in different liquids in order to optimise their repartition
when embedded in a polymer matrix. The optical properties of these
composite materials (nanoparticles/matrix) were studied. An
enhancement of the linear electrooptical effect was measured. This
effect is mainly attributed to interface effects between the polymer
matrix and the surface of the particles.

Legal notice
  • Legal notice:

    Copyrighted materials, (c) Pielaszek Research, all rights reserved.
    The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced, stored in or introduced into a retrieval or caching system, or transmitted in any form or by any means (electronic, mechanical, photocopying, recording or otherwise), or for any purpose, without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
    In every case, proper references including Author(s) name(s) and URL of this webpage: http://science24.com/paper/300 must be provided.

 

Related papers
  1. Versatility of Laser Pyrolysis for the Synthesis of TiO2 Nanoparticles
  2. Host size effects on optical properties of rare earth and transition metal doped materials
  3. Nanostructured catalysts from laser pyrolysis
  4. Nanocrystalline SiC compacts obtained by sintering of laser synthesized nanopowders under extreme pressures
  5. SiC-Zn nanocomposites obtained using high-pressure infiltration technique
  6. SiC nanocrystals embedded in polymer matrix : a new electro-optical nanocomposite
  7. Linear Electro-Optical Effects in SiC Nanocrystals Incorporated in Polymer Matrices

Presentation: oral at E-MRS Fall Meeting 2002, by Nathalie C. Herlin-Boime
See On-line Journal of E-MRS Fall Meeting 2002

Submitted: 2003-02-16 17:33
Revised:   2009-06-08 12:55
Google
 
Web science24.com
© 1998-2021 pielaszek research, all rights reserved Powered by the Conference Engine