Synthesis of tetrahedral patchy nanoparticles with controlled patch size
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RESEARCH PAPER
Synthesis of tetrahedral patchy nanoparticles with controlled patch size Pierre-Etienne Rouet & Rawan Khalaf & Stéphanie Exiga & Etienne Duguet & Serge Ravaine
Received: 16 July 2020 / Accepted: 21 October 2020 # Springer Nature B.V. 2020
Abstract Silica nanoparticles with four circular surface patches made of polystyrene (PS) and arranged in a tetrahedral symmetry are synthesized through the multistep growth of the silica core of silica/PS tetrapods. Transmission electron microscopy and energy dispersive X-ray analysis studies indicate that, as the silica core regrows, its surface conforms to the shape of the polystyrene nodules, allowing good control of the size of the emerged fraction of these. Patches with an angular width as small as 49° were achieved, which is a prerequisite for their assembly in the form of a diamond crystal phase. Keywords Patchy nanoparticles . Tetrahedral . Patch size . Colloidal clusters . Self-assembly
Introduction In recent decades, the development of functional and programmable materials via the self-assembly of colloidal particles has become a major challenge, which Supplementary Information The online version contains supplementary material available at https://doi.org/10.1007 /s11051-020-05060-w. P.
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