Hardin, James O.Ober, ThomasValentine, AlexanderLewis, Jennifer2017-07-202015Hardin, James O., Thomas J. Ober, Alexander D. Valentine, and Jennifer A. Lewis. 2015. “Microfluidic Printheads for Multimaterial 3D Printing of Viscoelastic Inks.” Advanced Materials 27 (21) (April 17): 3279–3284. doi:10.1002/adma.201500222.0935-9648http://nrs.harvard.edu/urn-3:HUL.InstRepos:33471108en-USJournal Article2015-08-10Hardin, JO, TJ Ober, AD Valentine, and JA Lewis10.1002/adma.201500222