Smart control of monodisperse Stöber silica particles: effect of reactant addition rate on growth process
NOZAWA, Koh
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Centre de physique moléculaire optique et hertzienne [CPMOH]
Laboratory of Molecular Dynamics and Complex Chemical Physics
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Centre de physique moléculaire optique et hertzienne [CPMOH]
Laboratory of Molecular Dynamics and Complex Chemical Physics
GAILHANOU, H.
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Centre de physique moléculaire optique et hertzienne [CPMOH]
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Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Centre de physique moléculaire optique et hertzienne [CPMOH]
NOZAWA, Koh
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Centre de physique moléculaire optique et hertzienne [CPMOH]
Laboratory of Molecular Dynamics and Complex Chemical Physics
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Centre de physique moléculaire optique et hertzienne [CPMOH]
Laboratory of Molecular Dynamics and Complex Chemical Physics
GAILHANOU, H.
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Centre de physique moléculaire optique et hertzienne [CPMOH]
< Leer menos
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Centre de physique moléculaire optique et hertzienne [CPMOH]
Idioma
en
Article de revue
Este ítem está publicado en
Langmuir. 2005, vol. 21, n° 4, p. 1516-1523
American Chemical Society
Resumen en inglés
Control over the synthesis of monodisperse silica particles up to mesoscopic scale is generally made difficult due to intrinsic limitation to submicrometric dimensions and secondary nucleation in seeded experiments. To ...Leer más >
Control over the synthesis of monodisperse silica particles up to mesoscopic scale is generally made difficult due to intrinsic limitation to submicrometric dimensions and secondary nucleation in seeded experiments. To investigate this issue and overcome these difficulties, we have implemented single step processing by quantifying the effects of the progressive addition of a diluted tetraethyl orthosilicate solution in ethanol on the size and monodispersity of silica particles. Contrary to particles grown in seeded polymerization, monodisperse particles with size up to 2 m were synthesized. Moreover, the particles exhibit a final diameter (df), which varies with V-1/3 over more than 2 orders of magnitude in rate of addition (V). On the basis of a kinetic study in the presence of addition showing that particle growth is limited by the diffusion of monomer species, we developed a diffusion-limited growth model to theoretically explain the observed df(V) behavior and quantitatively retrieve the measured amplitude and exponent. Using a single parameter procedure, we can therefore predict and generate in the room temperature range, monodisperse particles of a targeted size by simply adjusting the rate of addition.< Leer menos
Palabras clave en inglés
Double-jet precipitation
X-ray scattering
Aggregative growth
Monomer-addition
Size dependence
Sphere
Nucleation
Nanoparticles
Kinetics
Hydrolysis
Orígen
Importado de HalCentros de investigación