Mark Tibbitt demonstrated controlled release of protein from photodegradable PEG microspheres. His work earned him the Outstanding Research Winner in the PhD category for the 9th World Biomaterials Congress in China.
M.W. Tibbitt, B.W. Han, A.M. Kloxin, and K.S. Anseth, "Synthesis and Application of Photodegradable Microspheres for Spatiotemporal Control of Protein Delivery," Journal of Biomedical Materials Research Part A, 100A (7), 1647-1654 (2012).