FIGURE 2.
Scanning electron micrograph images of particles fabricated using the PRINT method: (A) degradable 2 μm cubic particles; (B) 10 μm magnetic hydrogel boomerangs; (C) 3 μm hydrogel toroids; (D) 100 × 300 nm hydrogel rods; (E) 200 nm cylindrical hydrogel particles; (F) 80 × 2000 nm filamentous hydrogel particles. Image (A) is reprinted with permission from ref 37, and Image (C) is reprinted with permission from ref 8. Copyright American Chemical Society 2008 and 2009. Image (E) is reprinted with permission from ref 41. Copyright 2007 Elsevier.