Lewis Lab

Prof. Jennifer Lewis, Sc.D. MIT

Wyss Professor


Scott Slimmer, University of Illinois, Ph.D.

Lab Manager

Contact Information: NWL B148.10, Email: slimmer@seas.harvard.edu

Tina Knight

Faculty Administrator

Contact Information: Pierce Hall 225, Email: tknight@seas.harvard.edu, Phone #: 617-495-1102


Bok Yeop Ahn, Korea University, Ph.D.

Bok Yeop Ahn received his PhD in Chemical Engineering from Korea University in 2006 and joined the Lewis research group in the University of Illinois at Urbana-Champaign (UIUC) as a postdoctoral researcher. During his Ph.D., he worked for the Korea Research Institute of Chemical Technology (KRICT) in the Advanced Materials Division and focused his researches on the transition metal oxide nanoparticles, sol-gel coatings, and alkyl-modified silica core/shell microcapsules. He moved to Harvard University in 2013 and currently holds the title of Senior Research Scientist in the Lewis Research Group through the Wyss Institute and the School of Engineering and Applied Sciences (SEAS). He focuses his efforts on the development of functional inks and direct-write assembly of printed electronics, 3D microbatteries, and 3D bio-architectures.

Contact Information: byahn@seas.harvard.edu

Kimberly Homan, University of Texas at Austin, Biomedical Engineering, PhD

Can 3D printing be used to create organs? My research tackles this challenge through the study of cell inks and the dynamic interactions of various cell types in biomaterials once printed and vascularized. 

Contact Information: kimberly.homan@wyss.harvard.edu

Mark Scott, Massachusetts Institute of Technology, PhD

During his PhD, Mark developed a method for rapid 2-D and 3-D laser printing of biomaterials using two photon microscopy. He applied his printer to develop detailed vascular structures, and to direct neural development. At the Lewis Research Group, Mark is developing large-scale vascular networks for tissue and organ printing using direct-ink writing methodologies. He is also interested in combining different 3-D printing methodologies to achieve novel capabilities in the field of additive manufacturing of biological materials.

Contact Information: mascott@seas.harvard.edu

Thomas Ober, Massachusetts Institute of Technology, PhD

Thomas earned his Ph.D at MIT for research in microfluidic rheometry and non-Newtonian fluid mechanics. Having joined the Lewis group, he focuses on the design, fabrication and optimization of microfluidic printing devices as well as omnidirectional printing of ceramic materials and particle-laden fluids.

Contact Information: tober@seas.harvard.edu

Jordan R. Raney, California Institute of Technology, PhD

During his PhD studies at Caltech, Jordan developed hierarchical materials based on carbon nanotubes.  In the Lewis Group, he uses 3D printing to develop hierarchical structures and composite materials.  Areas of current interest include bioinspired structures and materials, the effects of structural heterogeneities on mechanical properties, and functionally-graded materials.

Contact Information: raney@seas.harvard.edu

Daniele Foresti, Swiss Federal Institute of Technology, PhD

Society in Science - Branco Weiss Fellow

The inherent limits of the existing printing technologies strongly restrict the range of possible inks (i.e. materials) that can be dispensed, hence the potential applications of such technologies. Could we do better? As a Branco Weiss fellow, I will investigate a new concept of printing mechanism based on ultrasound. By using acoustic forces any ink could be potentially printed on any substrate.

Contact Information: dforesti@seas.harvard.edu

Nanjia Zhou, Northwestern University, PhD

Camille and Henry Dreyfus Environmental Chemistry Fellow

Nanjia Zhou received his PhD in Materials Science and Engineering from Northwestern University under the supervision of Prof. Tobin J. Marks and Prof. Robert P.H. Chang. During his PhD, Nanjia worked on solution-processable thin film solar cells, transparent oxides and molecular electronics. As a Dreyfus Environmental Chemistry Fellow in the Lewis group, his research focuses on eco-friendly direct ink writing of functional micro/nano architectures for photovoltaic cells and electronics. He is also interested in 3D integrated circuits and multifunctional devices employing printing technologies.

Contact Information: nzhou@seas.harvard.edu

Graduate Students

Analisa Russo - G6

Massachusetts Institute of Technology, BS

I make low-temperature conductive silver inks for direct writing of circuits onto flexible substrates. I work with Ashley on constructing large area devices on polyimide using Direct Ink Writing. I also work on drawing unique electronic devices on paper by rollerball pen, and co-authored a paper on this technology with Bok. Currently, I am studying the properties of functional particle-based inks that make them suitable for drawing with handheld tools.

Contact Information: arusso@seas.harvard.edu

David Kolesky - G5

University of Florida, Materials Science and Engineering, BS

I work on 3D printing of biological materials and architectures. Specifically, I am focused on creating highly vascularized cell-laden tissue constructs and developing novel inks.

Contact Information: kolesky1@seas.harvard.edu

Sydney Gladman - G5

University of Florida, Materials Science and Engineering, BS

I am working on creating stimuli-responsive polymer inks for the 3D printing of adaptable, bioinspired materials and structures. I am also working on our bioprinting efforts with a focus on polymers, hydrogels, and ECM-based materials.

Contact Information: sgladman@seas.harvard.edu

Kundan Chaudhary - G4

Illinois Wesleyan University, Physics, BS

I study the structural evolution of anisotropic colloidal particles.

Contact Information: chaudhary@seas.harvard.edu

Teng-Sing (Sean) Wei - G4 

University of Illinois, Urbana-Champaign, BS

I work on optimization and 3D printing of high solids loading Li-ion material suspensions for energy storage applications.

Contact Information: imseanwei@seas.harvard.edu

Ryan Truby - G3

University of Texas at Austin, Biomedical Engineering, BS

NSF Graduate Research Fellow

The vascularization of engineered tissue constructs remains a paramount challenge in tissue engineering and biofabrication. I am currently working to develop new fugitive inks that will enable the fabrication of perfusable, microvascular networks with omnidirectional 3D printing. Through these efforts, I also hope to explore the general materials palette that is compatible with our omnidirectional 3D printing method to print functional materials.

Contact Information: rtruby@seas.harvard.edu

Joseph Muth - G3

Purdue University, Materials Science and Engineering, BS

NSF Graduate Research Fellow
Hertz Fellowship Finalist 

I work on developing stretchable electronics and hierarchical composites. For the former, I use embedded-3D Printing to pattern conductive fluid inks directly into highly stretchable viscoelastic matrices, allowing freeform fabrication of monolithic elastomeric electronic devices. For the latter, I design 3D Printing inks with rationally designed microstructures. By simultaneously controlling ink design and print path, I am able to optimize materials over multiple length scales and exploit structure-processing-properties relationships in new ways.

Contact Information: jmuth@seas.harvard.edu

Travis Busbee - G3

Ohio State University, Materials Science and Engineering, BS

The coupling of mechanical forces with electrical signals could pave the way for the development of fully 3D printed functional devices capable of sensing and actuation. I am working to develop piezoelectric and pyroelectric polymer inks to add a new tool into the 3D printing toolbox. I am also working at the intersection of electronics and biology to use 3D printing to simplify the production of Lab-on-a-Chip assays for high throughput drug screenings.

Contact Information: tbusbee@seas.harvard.edu

Michael Bell - G2

Rose-Hulman Institute of Technology
Computer Engineering, BS
Mechanical Engineering, BS

NSF Graduate Research Fellow
Harvard Pierce Fellow

Evolving 3D printed objects from more than metal brackets and plastic toys requires the synergy of engineering disciplines and materials science. With a background in computer engineering, mechanical engineering, robotics and current PhD work in materials science I lead cutting edge research in 3D printed electronics at Harvard. I develop patent-pending machines, processes and materials to 3D print entire electromechanical devices, from simple embedded antennas to entire cell phones using integrated pick-and-place technologies.

Contact Information: bell@seas.harvard.edu

Nicole Black - G1

NSF Graduate Research Fellow

Boston University, Biomedical Engineering, BS

During my first year in the Lewis Lab, I plan to help with a variety of projects on the bioprinting team. One of my goals is to use 3D printing of biomaterials to create complex architectures that improve vascularization in tissue engineering applications. I also hope to develop novel cellular inks for direct 3D printing of a variety of cell types. By improving upon the materials and methods for 3D bioprinting, I hope to make strides toward the possibility of personalized fabrication of organs.

Contact Information: nicoleblack@g.harvard.edu

Research Fellows/Scientists

Alex Valentine

Boston University, Biomedical Engineering, BS

The field of stretchable and flexible electronics has evolved to create devices that are more functional and powerful than ever. In order to continue along this trajectory of technological development, additive manufacturing techniques will contribute greatly to the high-throughput fabrication of these devices, especially on the microscale. I work on the development of materials and processes for 3D printing of highly stretchable electronic devices. I am also involved in a project centered around a Lab-on-a-Chip device that crosses multimaterial 3D printing with a biologically-inspired sensing platform, resulting in a highly-parallel system for screening drugs and sensing forces at the cellular scale.

Contact Information: avalentine@seas.harvard.edu


Former group members (2001 - present)

Name Year Currently at Thesis
James Hardin Post-doc AFRL
Brett Compton Post-doc ORNL
David Lorang M.S(2013) Intel
Brett Walker PhD(2013) U of I/Electroninks Incorporated Synthesis and patterning of reactive silver inks
Chris Hansen PhD(2011) UMass Lowell Self-healing materials and multinozzle printheads with embedded microvascular networks
Elizabeth Glogowski Post-doc University of Wisconsin, Eau Claire
Willie Wu PhD(2010) Intel Direct Ink Writing of Microvascular Networks
Adam DeConinck M.S(2010) NVIDIA Fabrication, Dynamics, and Self-Assembly of Anisotropic Colloidal Particles
Sara T. Parker


Intel Direct-write assembly of 3D microperiodic scaffolds for tissue engineering applicationsDirect-write assembly of 3D microperiodic scaffolds for tissue engineering applications
Rob F. Shepherd PhD(2010) Cornell University Microfluidic assembly and packing dynamics of colloidal granules
Eric Duoss PhD(2009) LLNL
Jacinta Conrad Post-doc University of Houston
Jun Yoshikawa PhD(2009) NGK Comb Polymer Architecture and Particle Size Effects on the Behavior of Biphasic Nanoparticle Inks for Direct-Write Assembly
Summer Rhodes PhD(2009) Sandia National Labs Structure, Dynamics and Flow Behavior of Model Biphasic Colloidal Mixtures
Eric Duoss PhD(2009) LLNL Sol-Gel and Nanoparticle Inks for Direct-Write Assembly of Functional Metal Oxide and Metallic Materials
Dan Harris PhD(2008) Intel Patterning Colloidal Films via Evaporative Lithography
Ranjeet Rao PhD(2007) PARC Biphasic Nanoparticl Inks for Direct Write Assembly of 3-D Periodic Structures
Mingjie Xu PhD(2007) Intel Inorganic Hybrids Templated From 3-D Polyelectrolyte Scaffolds Assembled Via Direct Ink Writing
Ketan Bhatt Post-doc
Angel Chan MD/PhD (2007) Johns Hopkins University Nanoparticle Engineering of Colloidal Suspsension Behavior
Ali Mohraz Post-doc UC Irvine
Mark Roberts M.S(2005) BP Rheological properties and micro-particle imaging velocimetry of model colloidal fluids and gels
Greg Gratson PhD(2005) General Electric Colloidal and Polyelectrolyte Inks For Direct-Write Assembly of 3D Periodic Structures
Sarah Michna M.S(2004) Directed Assembly of 3-D Hydroxyapatite Scaffolds
Glen Kirby PhD(2003) Oak Ridge National Laboratory PAA/PEO Comb Polymer Effects on the Rheological Property Evolution in Concentrated Cement Suspensions
James Smay PhD(2002) Oaklahoma State University Directed Colloidal Assembly and Characterization of PZT-Polymer Composites
Carlos J. Martinez PhD(2002) Purdue University Structure and Property Evolution During Film Formation From Binary Colloidal Suspensions
Valeria Tohver Milam PhD(2002) Georgia Institute of Technology Phase Behavior, Structure, and Properties of Colloidal Microsphere-Nanoparticle Mixtures
Mariusz Twardowski Post-doc MIT
James Gilchrist Post-doc Lehigh University
Mike Bevan Post-doc Johns Hopkins University