I am looking for researchers (open to collaboration or willing to provide services at a cost) with access to field flow fractionation for size separation (50 nm, 100 nm, 200 nm and 300 nm) of Gd based Magnetic NPs and DLS/Laser diffraction size analysis system for particle size measurement / size distribution measurement. The sample we have contains sizes from 50 nm to 5 microns and more which is synthesized with high energy ball milling.