Although monodisperse amorphous silica nanoparticles have been widely investigated, their formation mechanism is still a topic of debate. Here, we demonstrate the formation of monodisperse nanoparticles from colloidally stabilized primary particles, which at a critical concentration undergo a concerted association process, concomitant with a morphological and structural collapse. The formed assemblies grow further by addition of primary particles onto their surface. The presented mechanism, consistent with previously reported observations, reconciles the different theories proposed to date.
|Number of pages||6|
|Publication status||Published - 2014|
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Center for Multiscale Electron Microscopy (CMEM)
Heiner Friedrich (Manager), Rick Joosten (Education/research officer), Pauline Schmit (Education/research officer), Ingeborg Schreur - Piet (Other) & Anne Spoelstra (Education/research officer)Physical Chemistry
Facility/equipment: Research lab