DOIAbstract
In the first part, synthetic routes to model systems of spherical silica nanoparticles with diameters in the range 30-360 nm are presented. The general method uses nanoparticles formed by an arginine catalysed synthesis as seeds for growth of Stöber-type silica. Fluorescently dyed and uniformly sized particles could be made with diameter as low as 30 nm (polydispersity <7%). By growing the particles to diameter 360 nm (polydispersity <2%), the possibility of imaging single particles in 3D with super-resolution optical microscopy was opened up, while keeping the gravitational length of the particles more than 50 times greater than the particle diameter. The second synthesis investigated was that of colloidal droplets. Droplet microfluidi...
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