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. Author manuscript; available in PMC: 2013 Sep 1.
Published in final edited form as: Adv Drug Deliv Rev. 2012 May 22;64(12):1257–1276. doi: 10.1016/j.addr.2012.05.006

Figure 10.

Figure 10

On-demand release of GFs using external stimuli provided in a non-invasive manner (e.g., electromagnetic stimulus) (A). (B) magnetic fields can be used to mechanically deform a macroporous ferrogel. (C) the magnetically-triggered deformation system can be used to release drugs on demand. Graph demonstrates a step increase in cumulative release of SDF-1α following each 2 min of magnetic stimulation (repeated every 2 hour) vs. no magnetic stimulation. Images adopted from Zhao et.al [188].