Conclusion
In this experiment, the sub-20 nm HSNs with the inner cavity diameter of
8 nm can be scaled up in RPB, and they show uniform particles size and
excellent monodispersity. As the anti-reflection additive agent, they
can be incorporated into optical polymer matrices to reduce the
refractive index and improved transparency of polymer effectively. Most
importantly, the haze of polymer is unchanged basically by adding HSNs,
indicating that HSNs with ultrafine grain size are well-dispersed in
polymer matrix. All in all, this work provides a simple and effective
method to stably synthesize the ultrafine HSNs, which can promote the
development of the technology for the large-scale preparation and
industrial application of anti-reflection materials.