Aside from our most popular silica sizes, we also accept requests for other sizes and surface functionalization. We can target any size of silica between 20 nm and 3 µm with a guaranteed coefficient of variation less than 7%.
We have the ability to functionalize our monodisperse particles at large scales. We readily provide these products on demand:
The stability of the functionalities in water have been measured for 200nm silica nanoparticles via the respective zeta potential of these functional groups. The presence of the hydroxyl ion (OH-) in the silanol group on the surface of the colloidal silica particles gives it a negative zeta-potential with a value of around -40mV. On the other hand, amine-terminated silica nanoparticles tend to show a positive zeta potential of approximately 25 to 30 mV depending on the nature of the functional group.
- Amine-terminated silica
- Alkyl & Vinyl-terminated silica
- Methacrylate-terminated silica
- Hydrophobic & superhydrophobic silica
Our proprietary, patent-pending process has led to large scale production of monodisperse, superhydrophobic silica nanoparticles and microspheres. We retain our ability to target any size between 100 nm to 2 µm while producing large quantities. The particles are halogen-free and containing no harmful fluorinating agents that are traditionally used to fabricate superhydrophobic surfaces. Our superhydrophobic silica has a guaranteed contact angle of greater than 120 degrees with water.