Nucleation and Growth of Monodisperse Silica Nanoparticles

作者：Carcouet Camille C M C; van de Put Marcel W P; Mezari Brahim; Magusin Pieter C M M; Laven Jozua; Bomans Paul H H; Friedrich Heiner; Esteves A Catarina C; Sommerdijk Nico A J M; van Benthem Rolf A T M; de With Gij**ertus^*

来源：Nano Letters, 2014, 14(3): 1433-1438.

DOI：10.1021/nl404550d

• Monodisperse silica particles
• nucleation and growth
• silica chemistry
• cryo-TEM
• solid state NMR

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.

• 出版日期2014-3