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. Author manuscript; available in PMC: 2012 Dec 11.
Published in final edited form as: Adv Mater. 2008 Mar;20(5):933–938. doi: 10.1002/adma.200701205

Figure 1. PVP polymer microneedles made by new in situ polymerization process.

Figure 1

(A) Overhead view and (B) side view of pure PVP microneedles. (C) Overhead view and (D) side view of PVP polymer microneedles with sulforhodamine encapsulated within microneedles, but not in the base substrate. Each microneedle measures 750 µm in height, 250 µm in base diameter and 5 µm in tip radius.