Journal ArticleDOI
Hybrid Dissymmetrical Colloidal Particles
Stéphane Reculusa,Céline Poncet-Legrand,Adeline Perro,Etienne Duguet,Elodie Bourgeat-Lami,Christophe Mingotaud,Serge Ravaine +6 more
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TLDR
In this paper, a seeded emulsion polymerization of styrene was carried out in the presence of these particles, the formation of polystyrene nodules being highly favored at the silica surface in such conditions.Abstract:
Colloidal particles with a controlled morphology combining both organic and inorganic parts were synthesized through a seeded emulsion polymerization process. Silica seed particles from 50 to 150 nm were first surface-modified by adsorption of an oxyethylene-based macromonomer or covalent grafting of a trialkoxysilane derivative. Then, emulsion polymerization of styrene was carried out in the presence of these particles, the formation of polystyrene nodules being highly favored at the silica surface in such conditions. While varying different experimental parameters, we have demonstrated that the ratio between the number of silica seeds and the number of growing nodules is a key parameter in controlling the morphology of the final hybrid nanoparticles. For instance, in the particular case when this ratio was close to 1, dumbbell-like or snowman-like particles were obtained. Further selective surface modification of their silica moiety was also tested successfully, indicating a potential application of these hybrid particles as original building blocks toward supraparticulate assembliesread more
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Polymer/Silica Nanocomposites: Preparation, Characterization, Properties, and Applications
Hua Zou,Shishan Wu,Jian Shen +2 more
TL;DR: Characterization and Properties 3928 8.2.1.
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Magnetically Separable Nanocatalysts: Bridges between Homogeneous and Heterogeneous Catalysis
TL;DR: The introduction of magnetic nanoparticles in a variety of solid matrices allows the combination of well-known procedures for catalyst heterogenization with techniques for magnetic separation.
Journal ArticleDOI
Design and synthesis of Janus micro- and nanoparticles
TL;DR: In this paper, a review deals with the great and imaginative efforts which were devoted to the synthesis of Janus particles in the last fifteen years and a special emphasis is made on scalable techniques and on those which apply to the preparation of the Janus particle in the nanometer range.
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Colloidal Assembly: The Road from Particles to Colloidal Molecules and Crystals
TL;DR: This Review highlights recent experimental and theoretical progress in the assembly of colloids larger than 50 nm.
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Fabrication, properties and applications of Janus particles
TL;DR: A critical review discusses the main fabrication methods of the three kinds of Janus particles, and highlights the important properties and applications of these Janus particle developed in recent years, and finally proposes some perspectives on the future ofJanus particle research and development.
References
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Journal ArticleDOI
Controlled growth of monodisperse silica spheres in the micron size range
TL;DR: In this article, a system of chemical reactions has been developed which permits the controlled growth of spherical silica particles of uniform size by means of hydrolysis of alkyl silicates and subsequent condensation of silicic acid in alcoholic solutions.
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Preparation and Characterization of Au Colloid Monolayers
TL;DR: In this article, the design and initial characterization of two-dimensional arrays of colloidal Au particles are reported, which are prepared by self-assembly of 12 nm diameter colloidal particles onto immobilized polymers having pendant functional groups with high affinity for Au (i.e., CN, SH, and NH 2 ).
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Formation and Adsorption of Clusters of Gold Nanoparticles onto Functionalized Silica Nanoparticle Surfaces
TL;DR: In this article, the growth and attachment of small gold nanoparticles to the functionalized surfaces of larger silica nanoparticles was investigated using transmission electron microscopy, and the coverage of the gold particles and clusters on the surfaces of the silica nano-nodes was evaluated.
Journal ArticleDOI
Syntheses of raspberrylike silica/polystyrene materials
Stéphane Reculusa,Céline Poncet-Legrand,Serge Ravaine,Christophe Mingotaud,Etienne Duguet,Elodie Bourgeat-Lami +5 more
TL;DR: In this paper, Raspberry-like hybrid organic−inorganic materials consisting of spherical silica beads supporting smaller polystyrene particles were prepared through a heterophase polymerization process.