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

Graduate Students

Sean Wei

Teng-Sing (Sean) Wei - G6

University of Illinois, Urbana-Champaign, BS

Sean pioneered the field of 3D printing Li-ion batteries and have done substantial research on semi-solid flow batteries. His expertise includes energy storage technologies, additive manufacturing, colloidal science, and ceramics processing.

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

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

Joseph Muth - G5

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.

Office: NWL B148.30, Email: jmuth@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

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

Katharina Kroll - Visiting Master's Student

University of Freiburg, Molecular Medicine, BS

What fascinates me as a research topic is the interaction of differentiated cells in order to form highly organized and complex structures such as living tissue. During my 1 year stay as a part of the bioprinting team in Jennifer Lewis’s group I will tackle maturation of 3D-bioprinted blood vessels in cell-laden vascularized thick tissue constructs. I will focus on biomaterials and perivascular cell types to further optimize the 3D-printed vasculature. 

Office: NWL B148.30, Email: kroll-katharina@gmx.de

Pien Goldsteen

Pien Goldsteen - Visiting Master's Student

Wageningen University - Molecular Lifesciences, BS

As a part of the bioprinting team I am working on the charaterization of engineered muscle and tendon tissue. For this I am testing different hydrogel compositions, to find in which hydrogel the tissues shows best biomimetic properties. Also I am working on the integration of both tissues.

Office: NWL B148.30, Email: piengoldsteen@gmail.com

Research Fellows/Scientists

Alex Valentine

Boston University, Biomedical Engineering, BS

Research Fellow

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.

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

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


Former group members (2001 - present)

NameYearCurrently atThesis
Sydney GladmanPhD (2016)  
Jordan R. RaneyPost-doc  
Thomas OberPost-docHaas F1 Team 
Analisa RussoPhD(2014)Electroninks 
James HardinPost-docAFRL 
Brett ComptonPost-docUniversity of Tennessee, Knoxville 
David LorangM.S(2013)Intel 
Brett WalkerPhD(2013)U of I/Electroninks IncorporatedSynthesis and patterning of reactive silver inks
Chris HansenPhD(2011)UMass LowellSelf-healing materials and multinozzle printheads with embedded microvascular networks
Elizabeth GlogowskiPost-docUniversity of Wisconsin, Eau Claire
Willie WuPhD(2010)IntelDirect Ink Writing of Microvascular Networks
Adam DeConinckM.S(2010)Los Alamos National LaboratoryFabrication, Dynamics, and Self-Assembly of Anisotropic Colloidal Particles
Sara T. Parker


IntelDirect-write assembly of 3D microperiodic scaffolds for tissue engineering applicationsDirect-write assembly of 3D microperiodic scaffolds for tissue engineering applications
Rob F. ShepherdPhD(2010)Cornell UniversityMicrofluidic assembly and packing dynamics of colloidal granules
Eric DuossPhD(2009)LLNL 
Jacinta ConradPost-docUniversity of Houston
Jun YoshikawaPhD(2009)NGKComb Polymer Architecture and Particle Size Effects on the Behavior of Biphasic Nanoparticle Inks for Direct-Write Assembly
Summer RhodesPhD(2009)Sandia National LabsStructure, Dynamics and Flow Behavior of Model Biphasic Colloidal Mixtures
Eric DuossPhD(2009)LLNLSol-Gel and Nanoparticle Inks for Direct-Write Assembly of Functional Metal Oxide and Metallic Materials
Dan HarrisPhD(2008)IntelPatterning Colloidal Films via Evaporative Lithography
Ranjeet RaoPhD(2007)PARCBiphasic Nanoparticl Inks for Direct Write Assembly of 3-D Periodic Structures
Mingjie XuPhD(2007)IntelInorganic Hybrids Templated From 3-D Polyelectrolyte Scaffolds Assembled Via Direct Ink Writing
Ketan BhattPost-doc  
Angel ChanMD/PhD (2007)Johns Hopkins UniversityNanoparticle Engineering of Colloidal Suspsension Behavior
Ali MohrazPost-docUC Irvine
Mark RobertsM.S(2005)BPRheological properties and micro-particle imaging velocimetry of model colloidal fluids and gels
Greg GratsonPhD(2005)General ElectricColloidal and Polyelectrolyte Inks For Direct-Write Assembly of 3D Periodic Structures
Sarah MichnaM.S(2004) Directed Assembly of 3-D Hydroxyapatite Scaffolds
Glen KirbyPhD(2003)Oak Ridge National LaboratoryPAA/PEO Comb Polymer Effects on the Rheological Property Evolution in Concentrated Cement Suspensions
James SmayPhD(2002)Oaklahoma State UniversityDirected Colloidal Assembly and Characterization of PZT-Polymer Composites
Carlos J. MartinezPhD(2002)Purdue UniversityStructure and Property Evolution During Film Formation From Binary Colloidal Suspensions
Valeria Tohver MilamPhD(2002)Georgia Institute of Technology Phase Behavior, Structure, and Properties of Colloidal Microsphere-Nanoparticle Mixtures
Mariusz TwardowskiPost-docMIT
James GilchristPost-docLehigh University
Mike BevanPost-docJohns Hopkins University