What is the Best Method for Producing Iron Oxide Nanoparticles?

[Rajini]

Dear All:
I interested to know about the production/synthesis of iron oxide nanoparticles.
At present, which method/process is adopted in chemical companies for the production of magnetite (Fe₃O₄)? May be for production of 1 kg per day? The size may be around 50 nm.
I also wanted to know:
In laboratory one can prepare even 5 nm sized Fe₃O₄ nanoparticles. Can some one tell me about the cheapest and easiest method of preparing Fe₃O₄ nanoparticles (may be less than 10 nm size) in lab scale?
Thank you for your help.
Regards, Rajini.

 

[Hyo X]

https://scholar.google.com/scholar?...oparticle+synthesis&btnG=&as_sdt=1,5&as_sdtp=
ive never done iron oxide