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https://www.nist.gov/image/microparticles-illustration

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# microparticles illustration

## Appears In

                        - NIST’s Ultra-small, Shape-shifting GEMS Offer an Easier and Cheaper way to improve MRI Imaging

The microparticles are soaked in a bath of iron salts, permeating the hydrogel with iron salts. They are then transferred to a high pH solution, which transforms the iron salts in the hydrogel into magnetic iron oxide particles.

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