When a suspension of magnetic nanoparticles is injected into a microslide channel that is positioned on top of a Halbach array, a concentration gradient is created. This is used to study nanoparticle toxicity on liver cells as a function of concentration. The publication can be found on ArXiv and JMMM .
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"Success is not final, failure is not fatal: it is the courage to continue that counts" -- Winston Churchilll |