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Principal Investigator (PI)

Postdoc, MSE: Stanford University

PhD, Chemistry: Purdue University

BS, Chemistry: Wofford College


Aristide Gumyusenge

Merton C. Flemings (1951) Assistant Professor of Materials  Science & Engineering

Postdoctoral Scholars

Arghya Roy

Arghya is a Wallenberg Postdoctoral Fellow in the OMSE Lab, MIT. Arghya earned his Ph.D. from Linköping University (2023), where he studied bioelectronics and conducted his doctoral research in the Laboratory of Organic Electronics. His doctoral research primarily focused on targeted drug delivery devices, with an emphasis on chronic pain therapy both in vitro and in vivo. His bachelor's degree was in Electronics and Communication Engineering at Shiv Nadar University, India (2015), and his master's degree in Green Electronics was from Nanyang Technological University, Singapore, and Technical University of Munich (2018). At MIT, Arghya will work on realizing Smart Integrated Neuromorphic Platforms for Closed-Loop Sensing and Actuation. Such feedback loops are highly desirable in healthcare applications, particularly those involving controlled release of drug molecules with high spatial-temporal resolution. Outside of research, Arghya enjoys traveling, playing badminton, swimming, and hiking.


Geon Gug Yang

Geon Gug received his Ph.D. from KAIST in Prof. Sang Ouk Kim’s group, where he focused on the morphology control of functional materials based on block copolymer and colloid self-assembly. He was previously a visiting scholar in the OMSE lab, and investigated the use organic mixed ionic-electronic conductors for gas sensing applications. Currently, Geon Gug is interested in deploying organic electrochemical transistors (OECTs) into various applications through novel device architectures and structure engineering of channel materials.


Graduate Students

Heejung Roh

Heejung is a graduate student at MIT in the Department of Materials Science and Engineering and the Program in Polymer and Soft Matter (PPSM). Prior to MIT, she received a B.A. in Industrial management and engineering/Materials science and engineering from POSTECH, South Korea, with a one term study abroad at HKUST. Her research interests are on design and synthesis of mixed ionic-electronic conductors (MIECs) for electrochemical applications, specifically electrolyte-gated transistors and neuromorphic devices.


Camille Cunin

Camille is a Ph.D. student in the Program in Polymer and Soft Matter (PPSM) and in the Department of Materials Science and Engineering. After receiving her B.S. in Engineering from École Centrale de Marseille in France, she completed a M.S. in Bioengineering and Nanotechnologies at École Centrale de Lyon and a M.S. in Medical Imaging, Signals and Systems at Université Claude Bernard Lyon 1. During her master’s thesis in the Department of Bioelectronics at École des Mines de Saint-Étienne, Camille worked on designing a novel strategy for encapsulating and micropatterning mechanically flexible optical neural probes. Fascinated by devices capable of interfacing the brain and mimicking its function, she joined the OMSE lab to design, process, and characterize organic materials for neuromorphic computing and bio-inspired electronic devices. Outside the lab, Camille loves travelling, hiking, climbing, dancing, and DJing.​


Eric Lee

Eric is a PhD student in the Department of Materials Science and Engineering and the Program in Polymer and Soft Matter (PPSM). Before coming to MIT, he received a BASc in Nanotechnology Engineering from the University of Waterloo in Canada. He is interested in the design and synthesis of polymers with applications such as bioelectronics that have direct impacts on improving human health. Broad research interests include nanomaterials, biomaterials, and nanomedicine. Outside of the lab, Eric enjoys baking, playing the piano/trombone, and playing video games.

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Rebecca Meacham

Rebecca is a PhD student in the Department of Materials Science and Engineering and the Program in Polymers and Soft Matter. Previously, Rebecca attended Clarkson University where she earned a BS in Chemical Engineering with minors in Chemistry and Materials Science and completed an honors thesis on dynamic covalent chemistry in polymers. Her research interests are in monomer design, polymer synthesis, and molecular self-assembly in polymer systems.

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Mujtaba Jebran

Mujtaba is a Mechanical Engineering graduate student at MIT. He earned his dual Bachelors of Science degree in Mechanical Engineering (MIT course 2) and in Electrical Engineering & Computer Science (6-2) with a minor in Nuclear Science and Engineering (22) from MIT in 2020. After graduating, he worked with the Traverso laboratory at MIT and Brigham and Women's Hospital, Harvard Medical School as a research engineer designing and developing medical devices and long-term drug delivery systems. At the OMSE lab, he is interested in designing and manipulating organic materials to develop micro- and nano-fabricated conformable systems and nanoelectronics for biomedical sensing, analysis, and drug delivery. Outside of the lab, he enjoys mentoring at the MIT Makerlodges and playing soccer.


Simone Bagatella (Visiting Grad Student)

Simone is a PhD student in Materials Engineering at Politecnico di Milano's Department of Chemistry, Materials, and Chemical Engineering "Giulio Natta." He earned his BS and MS with honors in Materials Engineering and Nanotechnology from the same institution. His research there focuses on designing, characterizing, and optimizing functional polymer-based nanocomposite materials for electronic applications, leveraging his expertise in additive manufacturing technologies.
Currently, Simone is a visiting PhD student in the OMSE lab, where he is working on formulating organic mixed ionic-electronic conductors (OMIEC) with enhanced thermal and environmental stability. Beyond academia, Simone is passionate about painting and architecture. He also enjoys outdoor activities like hiking and camping.


Undergraduate Students

Linnaea Uliassi

Grade: Senior (Class of '24)
Major 1: Materials Science & Engineering 
Major 2: Music and Theater Arts
Research interests: Organic electronics for health monitoring.


Sara Winther

Grade: Freshman (Class of '27)
Major 1: Materials Science & Engineering 
Major 2: Physics
Research interests: Organic electronics and nano materials for biological application

Come join our interdisciplinary research on organic semiconductors!

Please email Aristide a brief statement on your research interests to discuss open positions in the group!

MIT undergraduates should check the Undergraduate Research Opportunities (UROP) website for the available positions.

Non-MIT undergraduates are encouraged to apply to summer programs available at MIT (e.g. Center for Materials Science and Engineering (CMSE) REU, MIT Summer Research Program (MSRP), Amgen Scholars). Upon admission, you can choose OMSE Lab for your summer research!



Former Lab Members

Haoxin Gong (2023, Visiting GS), PhD Candidate, Cambridge University

Dr. Sanket Samal (2021-2022, Postdoc), Postdoc, Purdue University

Geon Gug Yang (2022, V-GS), Postdoc, OMSE Lab

Hayim Sims (2023, Summer Intern), Undergrad, Roxbury Community College

Community Involvement

Diversity and Inclusion

Throughout his research journey, Aristide has strived to ensure that the field of materials science can continue to be more diverse and inclusive. Thus far his approach has been to promote engagement in positive conversations, self education, and education of colleagues on historical origins of socio-economical disparities especially in America. OMSE Lab members are thus also encouraged to contribute, initiate, and engage in activities promoting equitable education. Aristide has been and remains an active member of inclusive education initiatives: 


2021-PresentMITActive member of the departmental diversity, equity & inclusion council. Contributing member to initiatives and policy discussions towards increasing DEI through teaching.


2020-2022: Stanford. Contributed to the campus-wide initiative for making positive change especially in the research community at Stanford University.

2017-2020: Purdue University. Active member of DTA (Diversity Transformation Award), a chemistry department diversity initiative to help facilitate communication between prospective minority students and current graduate students at  Purdue University.

Community Initiatives

Water2All Rwanda

As a native of Rwanda, Aristide spent several hours when he was younger walking to and from water wells and had to carry water home every day. Since it was a necessity, he never had to think twice on whether the time he spent on this inconvenient task could have been used for his education and career development. It was either thirst or reading time, the choice was obvious. To this day, many children still have to walk miles and spend hours to get water, and oftentimes, dirty water!

At the beginning of Covid 19, when access to clean water became more critical than ever before, Aristide initiated a project, Water2All, with the aim to find affordable ways to provide clean and running water in rural areas of Rwanda, starting with Kamonyi district. For more details on the project, feel free to reach out to Aristide. Thus far, he has raised enough funds through donations and personal efforts to build a water well that now provides clean water to over 50 households in Kamonyi!

BookSmart Rwanda

Aristide now aims to establish a platform for these children who no longer have to walk and wait in line for water to turn the water fetching times into reading and talent development times, an opportunity that he never had growing up.  His ultimate goal is to establish youth centers, where children can gather to read, play, and be mentored. Currently, he is partnering with his parents, retired educators in Rwanda, to offer guidance and mentorship to children starting in Kamonyi district. His parents currently run a "Itetero" in their home, which is essentially a community daycare for local children. There, children can come and are taught basic reading and writing for free, and are also educated about hygiene practices and nutrition (examples of Itetero topics have been animated for online access, link). In partnership with the local institutions, the Itetero also serves as a spot for monitoring the health and growth of the children, especially those from low income families. Aristide aims to continue monitor the education progress of Itetero graduates and foster their career development through BookSmart Rwanda!

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