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Journal of Solid State Chemistry 182 (2009) 1700-1707
Growth of ordered silver nanoparticles in silica film mesostructured with a triblock copolymer
L. Bois1, F. Chassagneux1, S. Parola1, F. Bessueille2, Y. Battie3, N. Destouches3, A. Boukenter3, N. Moncoffre4, N. Toulhoat4

Elaboration of mesostructured silica films with a triblock copolymer polyethylene oxide–polypropylene oxide-polyethylene oxide, (PEO–PPO–PEO) and controlled growth of silver nanoparticles in the mesostructure are described. The films are characterized using UV–visible optical absorption spectroscopy, TEM, AFM, SEM, X-ray diffraction (XRD) and Rutherford backscattering spectrometry (RBS). Organized arrays of spherical silver nanoparticles with diameter between 5 and 8nm have been obtained by NaBH4 reduction. The size and the repartition of silver nanoparticles are controlled by the film mesostructure. The localization of silver nanoparticles exclusively in the upper-side part of the silica-block copolymer film is evidenced by RBS experiment. On the other hand, by using a thermal method, 40nm long silver sticks can be obtained, by diffusion and coalescence of spherical particles in the silica-block copolymer layer. In this case, migration of silver particles toward the glass substratefilm interface is shown by the RBS experiment.
1 :  LMI - Laboratoire des Multimatériaux et Interfaces
2 :  SA - Sciences Analytiques
3 :  LHC - LAboratoire Hubert Curien [Saint Etienne]
4 :  IPNL - Institut de Physique Nucléaire de Lyon
Silver nanoparticles – Block copolymer – Silica film