1. Department of Mechanical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
2. Department of Chemical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
3. Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
4. Department of Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
5. Department of Industrial Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
6. Electroninks Incorporated, Austin, Texas 78744, United States