Lewis Lab

Prof. Jennifer Lewis, Sc.D. MIT

Wyss Professor


Contact Information:

Pierce Hall 221

Email: jalewis@seas.harvard.edu

Phone #: 617-496-0233



Scott Slimmer

University of Illinois, Materials Science and Engineering, PhD

Lab Manager

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


Tina Knight

Tina Knight

Michigan State University
Finance, BA
Microbiology, BS

Faculty Administrator

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


Senior Research Scientist

Bok Yeop Ahn

Korea University, PhD

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.

Office: NWL B146.40, Email: byahn@seas.harvard.edu


Research Associates

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. 

Office: NWL B148.10, Email: kimberly.homan@wyss.harvard.edu

Mark Skylar-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.

Office: NWL B146.40, Email: mascott@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.

Office: NWL B146.40, Email: 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.

Office: NWL B148.10, Email: nzhou@seas.harvard.edu

J. William Boley

Purdue University, PhD

During his PhD, Will focused on physical modeling of drop coalescence and studied how this phenomenon affects film uniformity and device performance in functional inkjet printing. From this model he developed an algorithm that automatically designs print routines for optimal device performance in multi-nozzle inkjet systems. As a post-doc at Purdue, he focused on novel methods for printing room temperature liquid metals. In the Lewis Lab, Will is developing materials and processes for 3D printed optics, energy devices, and soft electronics.

Office: NWL B146.40, Email: jwboley@seas.harvard.edu

Sébastien G.M. Uzel

Massachusetts Institute of Technology, PhD

Sebastien received his PhD from the department of Mechanical Engineering at MIT under the supervision of Pr. Roger Kamm.  There, he developed microfluidic devices to expose cells to complex and dynamic concentration profiles within a 3D extracellular matrix.  In addition, by combining optogenetic technology and microfluidics, Sebastien designed a platform that allowed compartmentalized 3D coculture of light-excitable motor neurons and muscle cells.  In the Lewis Lab, Sebastien's research focuses on utilizing 3D bioprinting to engineer vascularized and functional biological tissues.  He is also interested in the development of tools and strategies to enhance the scale and versatility of 3D printing.

Office: NWL B146.40, Email: suzel@g.harvard.edu

Claas Visser

University of Twente, PhD

Rubicon Fellow

Many materials are either too hard to 3D-print, or too soft to maintain their shape after deposition. Claas develops new processes to print these ``difficult’’ materials. By building on his PhD in fluid mechanics from Detlef Lohse's group, he optimizes the material softening, flow, and solidification in new and existing 3D printing processes.

Office: NWL B146.40, Email: visserc@seas.harvard.edu 

David Kolesky 

Harvard University, PhD

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.

Office: NWL B148.30, Email: kolesky1@seas.harvard.edu

Benito Román-Manso

Institute of Ceramics and Glass (CSIC) & Autonomous University in Madrid, PhD

Benito received his PhD degree in 2015 after carrying out studies in SiC ceramics and graphene-ceramic composites in the Institute of Ceramics and Glass (ICV-CSIC) in Madrid. The aim was the enhancement of the physical properties of these ceramic-based materials, fabricated both as bulk and as 3D-printed scaffold structures. In the Lewis group, Benito’s research is centered on the development of novel, 3D-printed ceramics with different functionalities.

Office: NWL B161, Email: romanmanso@seas.harvard.edu

Brad Duncan

Bradley Duncan

University of Massachusetts, PhD

As a postdoctoral associate at MIT Lincoln Laboratory in collaboration with the Lewis Group, Bradley is using a combination of polymer chemistry, nanoparticle functionalization, and materials science principles to develop new composite-based inks for direct-write 3D printing.

Email: Bradley.Duncan@ll.mit.edu

Alex Chortos

Alex Chortos 

Stanford University, PhD

During his PhD, Alex investigated processes for fabricating intrinsically stretchable transistors and pressure sensors for biomimetic and neuromorphic electronics. In the Lewis Lab, Alex is developing printed electronics for bio-interfacing applications.

Office: NWL B148.30, Email: achortos@seas.harvard.edu

Neil Lin

Neil Lin

Cornell University, PhD

Roche Fellow

During his PhD, Neil studied the flow behavior of soft materials at the microscopic scale using 3D image-based flow measurements and customized rheometry. In the Lewis Lab, Neil is working on 3D printing of highly vascularized tissues. In particular, he focuses on developing methods and bio-inks creating kidney models that recapitulate human responses.

Office: NWL B148.30, Email: nlin@g.harvard.edu

Graduate Students

Ryan Truby - G5

University of Texas at Austin, Biomedical Engineering, BS

NSF Graduate Research Fellow

My research aims to blur the distinction between “material” and “machine.” Using 3D printing, specifically a technique called “embedded 3D” printing, I am interested in creating entirely soft machines and robotic systems capable of autonomous functionality. 

Office: NWL B148.30, Email: rtruby@seas.harvard.edu

Travis Busbee - G5

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.

Office: NWL B148.30, Email: tbusbee@seas.harvard.edu

Michael Bell - G4

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.

Office: NWL B148.30, Emailbell@seas.harvard.edu

Nicole Black - G3

Boston University, Biomedical Engineering, BS

NSF Graduate Research Fellow

I am interested in the relationship between structure and function at the micron-scale in living tissues. My research investigates 3D printed biodegradable elastomeric grafts that can be remodeled into mechanically anisotropic tissues in vitro and in vivo. Currently, I am working with the Massachusetts Eye and Ear Infirmary to design tympanic membrane grafts with tailored motion patterns in response to acoustic stimuli. Eventually, we hope that this technology will improve hearing outcomes following tympanoplasty surgery.

Office: NWL B148.30, Email: nicoleblack@g.harvard.edu

Arda Kotikian - G2

Mount Holyoke College, Chemistry & Math, BA

NSF Graduate Research Fellow

I am working on the development of novel functional inks that will be used to 3D print flexible and stretchable electronic devices.  I am especially interested in the use of these inks in bioinspired and biointegrated sensing or actuation devices. 

Office: NWL B148.30, Email: akotikian@g.harvard.edu

Jeremy Huang - G2 

University of California at San Diego, Electrical and Computer Engineering, MS
University of California at Berkeley, Electrical Engineering & Computer Science, BS

As a PhD student at Harvard Medical School who is co-advised by Professor Lewis, my work focuses on gene-regulation and cell-lineage decision making in the early mammalian embryo. In collaboration with the Lewis group, I am interested in how maternal in vivo conditions can be recapitulated in vitro.

Office: NWL B148.30, Email: jyhuang@g.harvard.edu

John Ahrens

John Ahrens - G1 

Stanford University, Biomechanical Engineering, BS

I am interested in 3D printing scalable, vascularized tissues that could improve current stem cell derived disease models and regenerative therapies.

Office: ESL 101Email: ahrensj@g.harvard.edu

Katharina Kroll - G0

University of Freiburg, Molecular Medicine, MSc

As part of the bioprinting team, I am investigating printing of hierarchical blood vessel systems with complex cellular interactions. Scaling up the bioprinting approach to incorporate biologically relevant geometries and cellular variety could be the next step towards building functional tissues mimicking complexity and organization of tissue physiology.

Office: NWL B148.30, Email: kkroll@g.harvard.edu

Jochen Mueller - Visiting Graduate Student from ETH Zurich

Imperial College London, Mechanical Engineering, M.Sc.
Swiss Federal Institute of Technology, Mechanical Engineering, Doctoral student

I investigate the material-process-structure interactions for additive manufacturing applications with a focus on multi-material printing to explore its potential for (bio-inspired) lightweight structures.

Shea group website: http://www.edac.ethz.ch/

Email: jm@ethz.ch

Francesco Sillani

Francesco Sillani – Visiting Master’s Student

Politecnico di Milano – Materials Engineering and Nanotechnology MSc

Being a member of the acoustic printing group, and due to the versatility offered by our device regarding the materials that can be processed, my work at the Lewis Lab is mainly focused on the development and deposition of strongly non-Newtonian fluids through acoustic forces - an unexplored field in the droplet-base printing methods.

 Office: NWL 148.30, Email: francesco.sillani93@gmail.com

Laura Cetre

Laura Cêtre - Visiting Master’s Student

École polytechnique fédérale de Lausanne - Bioengineering, M.Sc.

Acoustic force enable printing of a larger range of viscous materials. I am focusing on droplet-on-demand printing of biocompatible materials like hydrogels and PEG using acoustic force coupled to local air flow control. My aim is to integrate acoustophoretic printing in tissue engineering applications.

Office: NWL 148.30, Email: laura.cetre@epfl.ch

Dahlia Amato

Dahlia Amato - Visiting Graduate Student from University of Southern Mississippi 

California Polytechnic State University, Polymer and Coatings, M.Sc.

As the problem of antibiotic resistance rapidly increases, sterilization of materials in the medical industry has become increasingly difficult. I am interested in investigating mechanically durable 3D printed materials capable of leaching potent antimicrobial agents to help overcome this challenge.

Office: NWL 148.30, Email: dahlia.amato@usm.edu

Research Fellows/Scientists

Armand Kurum

Armand Kurum

Swiss Federal Institute of Technology Zurich, Mechanical Engineering, M.Sc.

Research Fellow

Traditional droplet deposition methods are often limited to a narrow range of inks. I will investigate the printing of a broad range of materials using a new printing mechanism based on acoustic forces.

Office: NWL B148.30, Email: akurum@seas.harvard.edu

Donald Mau

Donald Mau

University of Central Florida, Biology, BS

Cell Technician

I work in a supportive role, supporting the bio-printing team with cell culture related tasks and research.

Office: ESL 101, E-mail: Donald.Mau@wyss.harvard.edu

Robert Weeks

Robert Weeks

University of Waterloo, Mechanical Engineering, BASc

Research Fellow

The setup and fine tuning of all the different parameters in additive manufacturing often takes much longer than the actual print itself. I am interested in the development of novel additive manufacturing systems with process feedback to decrease setup time, increase printing throughput and optimize print quality.

Office: NWL 148.30, Email: rweeks@g.harvard.edu


Former group members (2001 - present)

Name Year Currently at Thesis
Teng-Sing Wei PhD (2017)    
Joseph Muth PhD (2017)    
Alexander Valentine Research Fellow    
Sydney Gladman PhD (2016)    
Jordan R. Raney Post-doc    
Thomas Ober Post-doc Haas F1 Team  
Analisa Russo PhD (2014) Electroninks  
James Hardin Post-doc AFRL  
Brett Compton Post-doc University of Tennessee, Knoxville  
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) Los Alamos National Laboratory Fabrication, Dynamics, and Self-Assembly of Anisotropic Colloidal Particles
Sara T. Parker

PhD (2010)

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