Can anyone tell me please from where I can find out glass nano beads?

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Jos Laurie Campbell

If you are just after SiO2 nanobeads ie. less than 500nm in diameter, you can easily make them using the Stober method. After a couple of attempts you should be able to produce decent quantitiy materials equal or greater in quality to those that can be purchased. I have never found purchased nanoparticles to live up to their claimed size and monodispersity, but times may have changed. TEOS, ammonia, alcohol and water is all you need.