Nanoparticles of metals or metal oxides are a subject of great interest in current research because of their unique physical and chemical properties which come from their high surface/volume ratio and from quantum size effects.¹ Because of their particular properties, nanoparticles find applications in various fields such as electronics, optics, catalysis and magnetic storage media. Metal oxides nanoparticles are often used as sensitive layers in gas sensors,² but sometimes display a lack of selectivity towards a target gas. To overcome these problems, membrane filters can be employed, but then comes the problem of saturation. Thus, the use of catalytic filters involving a porous material as a catalyst support is an alternative that can increase the selectivity of gas sensors.³ In this communication, an original way for the preparation of hybrid RuO₂@SiO₂ nanomaterials will be presented. The key point of this synthesis method is the use of ruthenium nanoparticles stabilized by a bifunctional ligand as building blocks. Such a ligand allows the nanoparticles stabilization in the first stage and then their assembly through the formation of silica by sol-gel process (Figure 1). Composite nanomaterials so-obtained can contain a high content of metallic nanoparticles dispersed in a matrix of silica. After calcination, hybrid RuO₂@SiO₂ nanomaterials are obtained. Such nanomaterials were used as catalytic filters for selective detection gaz⁴

REFERENCES: ¹ a) T. Hyeon, Chem Commun. 2003, 927. b) K. J. Klabunde, in Nanoscale Materials in Chemistry (Ed. K. J. Klabunde), Wiley Intersciences, New York 2001. c) M. R. Diehl, J.-Y. Yu, J. R. Heath, G. A. Doyle, S. Sun, C. B. Murray, J. Phys. Chem. B 2001, 105, 7913. d) D. L. Leslie-Pelescky, R. D. Rieke, Chem. Mater. 1996, 8, 1770. ²  a) D. E. Williams, in Solid-State Gas Sensors (Eds. P. T. Moseley, B. C. Tofield) Adam Hilger, Bristol 1987 p. 71. b) V. Lantto, in Gas Sensors, Principle, Operation and Developments (Ed: G. Sberveglieri), Kluwer Academic, Dordrecht, Germany 1992, p. 117. c) K. Ihokura, J. Watson, The Stannic Oxide Gas Sensor: Principles and Applications, CR Press, Boca Raton, FL 1994. ³  A. Cabot, J. Arbiol, A. Cornet, J. R. Morante, F. Chen, M. Liu, Thin Solid Films 2003, 436, 64. ⁴ a) S. Jansat, K. Pelzer, J. Garcia-Antón, R. Raucoules, K. Philippot, A. Maisonnat, B. Chaudret, Y. Guari, A. Mehdi, C. Reyé, R. J. Corriu, Adv. Funct. Mater. 2007, 17, 3339. b) A. Maisonnat, K. Philippot, B. Chaudret, S. Jansat, J. Garcia-Antón, F. Turpin, Y. Guari, R. Corriu, V. Matsura, Brevet français, CNRS FR (N° 06 04896) et PCT/FR2007/000905) c) V. Matsura, Y. Guari, C. Reyé,  R.J.P. Corriu, M. Tristany, S. Jansat, K. Philippot,  A.  Maisonnat, B. Chaudret . Adv. Funct. Mater. submitted.

• Legal notice:
  

  Copyright (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 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: https://science24.com/paper/18163 must be provided.

1. Metal nanoparticles: from synthesis to catalytic properties
2. Copper deposition using wet chemistry. A new way : Organometallic chemistry for microelectronics