LI, Weiya; RAVAINE, Serge; DUGUET, Etienne

doi:10.1016/j.jcis.2019.10.104

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LI, Weiya
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

RAVAINE, Serge
Centre de Recherche Paul Pascal [CRPP]

DUGUET, Etienne
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Article de revue

Ce document a été publié dans

Journal of Colloid and Interface Science. 2020-02, vol. 560, p. 639-648

Elsevier

Résumé en anglais

We report a quite simple strategy to assemble silica/polystyrene dumbbell-shaped nanoparticles into clusters with an aggregation number from two to more than 30. The polystyrene lobe serves as a patch that is made sticky and ready to merge with similar ones when the dumbbells are dispersed in an ethanol/DMF mixture. Thanks to transmission electron microscopy experiments, we describe qualitativelyand quantitatively the influence of several experimental parameters such as the solvent quality, i.e. DMF fraction, and the patch-to-particle size ratio. We show that the DMF fraction range (30–50 vol%) for the sticky regime can be extended if the incubation process is completed by a centrifugation step.We also demonstrate an unexpected evolution in the average aggregation number with the patch-toparticle size ratio that may be explained by the molar mass distribution within the polystyrene core of the clusters. Lastly, we show that this assembly route may be extended to gold-coated clusters.< Réduire

Mots clés en anglais

Patch-to-particle size ratio

silica/polystyrene nanoparticles

solvent-induced assembly

patch-to- particle size ratio

gold-decorated silica clusters

DOI

http://dx.doi.org/10.1016/j.jcis.2019.10.104

Project ANR

Dilater le système atomique conventionnel à l'échelle colloïdale grâce à des particules préprogrammées pour une valence donnée - ANR-15-CE09-0010
Advanced Materials by Design - ANR-10-LABX-0042
Initiative d'excellence de l'Université de Bordeaux - ANR-10-IDEX-0003

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Importé de hal

Unités de recherche

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026