ABSTRACT
The concept of using external magnetic fields to achieve a pulsatile
release from polymer composites was first pursued by Langer and
coworkers in 1981 [1]. They incorporated magnetic steel beads in
ethylene vinyl acetate polymers and showed that the application
of low-frequency oscillating magnetic fields can be used to control
release rates of different compounds like bovine serum albumin
and insulin. In recent years, stimuli-responsive polymers, which
can respond to external stimuli, such as pH, temperature, light,
ultrasound, and the presence of magnetic or electric fields, have
attracted a great deal of interest [2-4].
