title: Microfluidic Printheads for Multimaterial 3D Printing of Viscoelastic Inks.
abstract: Multimaterial 3D printing using microfluidic printheads specifically designed for seamless switching between two visco-elastic materials "on-the-fly" during fabrication is demonstrated. This approach opens new avenues for the digital assembly of functional matter with controlled compositional and property gradients at the microscale.
authors.affiliation: Harvard School of Engineering and Applied Sciences, Wyss Institute for Biologically Inspired Engineering, Cambridge, MA, 02138, USA.
authors.forename: James O
authors.initials: JO
authors.lastname: Hardin
authors.affiliation: Harvard School of Engineering and Applied Sciences, Wyss Institute for Biologically Inspired Engineering, Cambridge, MA, 02138, USA.
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Ober
authors.affiliation: Harvard School of Engineering and Applied Sciences, Wyss Institute for Biologically Inspired Engineering, Cambridge, MA, 02138, USA.
authors.forename: Alexander D
authors.initials: AD
authors.lastname: Valentine
authors.affiliation: Harvard School of Engineering and Applied Sciences, Wyss Institute for Biologically Inspired Engineering, Cambridge, MA, 02138, USA.
authors.forename: Jennifer A
authors.initials: JA
authors.lastname: Lewis
keywords: 3D printing; ink; microfluidics; multi-material; viscoelastic