Where can I buy 50-100 nm silica nanoparticles embedded with fluorophores that have an excitation peak ~445 nm?

I am looking for 50-100 nm fluorescent silica  nanoparticles for 3D PTV experiments that works with our 445 nm laser. I have looked through various vendors website, but haven't found anything...

12 December 2016 3,311 1 View