ABSTRACT
Magnetically directing particles for medical applications requires moving particles through the viscoelastic materials of the body. An understanding of how particle transport proceeds through such materials, and how such transport processes differ from transport through purely viscous materials, is critical for improving and optimizing transport goals. In this chapter we review broad classes of particle surface modifications for enhancing transport through tissues, as well as recent literature on motion through biological polymers, magnetic fields for inducing transport and recent advances in nonspherical particle interactions with biopolymers.
