Growth of ordered silver nanoparticles in silica film mesostructured with a triblock copolymer PEO-PPO-PEO
- Laboratoire Multimateriaux et Interfaces, UMR CNRS 5615, Bat Berthollet, Universite Claude Bernard Lyon 1, 43 Bd 11 nov 1918, 69622 Villeurbanne (France)
- Laboratoire des Sciences Analytiques, UMR CNRS 5180, Bat Raulin, Universite Claude Bernard Lyon 1, 43 Bd 11 nov 1918, 69622 Villeurbanne (France)
- Laboratoire Hubert Curien, UMR 5516 - Universite Jean Monnet, 18 Rue Prof. B. Lauras, Bat F, F-42000 Saint-Etienne (France)
- Universite Lyon 1, IPNL, CNRS/IN2P3, 4 rue E. Fermi, 69622 Villeurbanne cedex (France)
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 8 nm have been obtained by NaBH{sub 4} 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, 40 nm 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 substrate-film interface is shown by the RBS experiment. - Graphical abstract: Growth of silver nanoparticles in a mesostructured block copolymer F127-silica film is performed either by a chemical route involving NaBH{sub 4} reduction or by a thermal method. An array of spherical silver nanoparticles with 10 nm diameter on the upper-side of the mesostructured film or silver sticks long of 40 nm with a preferential orientation are obtained according to the method used. a: TEM image of the Fag5SiNB sample illustrating the silver nanoparticles array obtained by the chemical process; b: HR-TEM image of the Fag20Sid2 sample illustrating the silver nanosticks obtained by the thermal process.
- OSTI ID:
- 21370471
- Journal Information:
- Journal of Solid State Chemistry, Vol. 182, Issue 7; Other Information: DOI: 10.1016/j.jssc.2009.01.044; PII: S0022-4596(09)00175-3; Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ATOMIC FORCE MICROSCOPY
COPOLYMERS
CRYSTAL GROWTH
NANOSTRUCTURES
POLYETHYLENE GLYCOLS
POLYPROPYLENE
RUTHERFORD BACKSCATTERING SPECTROSCOPY
SCANNING ELECTRON MICROSCOPY
SILICA
SILVER
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
ALCOHOLS
COHERENT SCATTERING
DIFFRACTION
ELECTRON MICROSCOPY
ELEMENTS
GLYCOLS
HYDROXY COMPOUNDS
METALS
MICROSCOPY
MINERALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDE MINERALS
POLYMERS
POLYOLEFINS
SCATTERING
SPECTROSCOPY
TRANSITION ELEMENTS