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Principal Investigator



Assistant Professor

Postdoctoral scholar, 2016-2019

Ginsberg group, University of California, Berkeley

Development of ultrafast interferometric microscopy for 3D tracking of energy flow; biomimetic light harvesting.

Doctoral Prize Fellow, 2015 and ​PhD Physical Chemistry, 2010-2014

Weinstein group, University of Sheffield


Quantum control of electron transfer in molecules ; ultrafast 2D infrared spectroscopy; artificial photosynthesis.

Milan was born in Nice, France, but grew up on Reunion island in the Indian Ocean, where his primary concerns were scuba-diving, bodyboarding, sailing and trekking. He completed his higher education in the UK, where after a masters in theoretical astrophysics he switched to experimental physical chemistry to study artificial photosynthetic systems using ultrafast infrared spectroscopy. In his PhD, performing experiments in Sheffield and at the Central Laser Facility (Rutherford Appleton Labs), he developed a new approach for predictive quantum control of intramolecular electron transfer in the condensed phase using vibrational excitation. In his postdoctoral years at UC Berkeley, he developed a generalizable interferometric ultrafast microscope capable of tracking energy carriers diffusing through any semiconductor in 3D with few-nm precision and picosecond resolution. He was appointed as Assistant Professor at Columbia University in 2019.

Postdoctoral Scholars


2022 - present

Postdoc, 2021-2022

Dongho Kim group, Yonsei University

PhD Physical Chemistry, 2015-2021

Dongho Kim group, Yonsei University

BA Chemistry, 2010-2015

Yonsei University

Yongseok was born and raised in South Korea. He completed his B.A. and Ph.D. in the department of chemistry at Yonsei university. During his Ph.D., he studied the structure-property relationship of organic systems using time-resolved spectroscopy. Through controlling the intermolecular interaction of molecules and developing instruments, he revealed the mechanism for various excited-state relaxation pathways of perylene diimide (PDI) aggregates. He joined the Delor group in the winter of 2022 and aims to investigate ultrafast nonequilibrium dynamics in strongly correlated materials using ultrafast microscopy. Outside of work, he enjoys visiting art museums and listening to classical music.


Graduate Students

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2019 - present

BSc Chemistry, 2015-2019

National Taiwan University

Born and raised in Taipei, Taiwan, Cheng is still adapting to the weather in NYC. In his undergraduate years, he obtained research experience in Professor Chun-hsien Chen’s group working on molecular electronics using mainly customized scanning tunneling microscopy, where he developed a strong interest in studying electron transport behavior in materials. He is looking forward to gaining insight on controlling electron flow in the Delor group. When not in the lab, he may be delocalized in NYC trying something new.


2019 - present

BA Chemistry and Global Health, 2015-2019

Washington University in St. Louis

Vicky grew up in Shenzhen, China with interests in music, oil-painting and fencing. She received her B.A. in Chemistry and Global Health from Washington University in St. Louis. Previously, she worked in Professor Sophia Hayes’ lab on solid-state NMR crystallography of CO2 mineralization products. In the Delor group, she works on ultrafast microscopy of semiconductor heterostructures and plasmonic superlattices.


2019 - present

BSc Chemistry, 2014-2019

Wuhan University

​Visiting researcher, North Carolina State University

Ding is from Zhejiang, a coastal province in eastern China. Raised in a handicraftsman family, he is good at woodwork, weaving, painting, and cooking. During senior high school, he became interested in chemistry, which answered his questions about the mechanics of daily phenomena, such as rice-made paste, swelling of fishnets, fermentation and so on. In college, he began to study the doping of two-dimensional materials (Fu group). He successfully synthesized a series of lanthanide-doped TMDs and studied how lanthanide modifies the optoelectronic and catalytic properties of TMDs. In 2018, he worked in the Dickey group as a visiting student, where he developed a method to prepare ultrathin metal oxide films at ambient environment. He is now a graduate student in the Chemistry Department of Columbia University.



2020 - present

NSF Graduate Research Fellow

BS Chemistry, BS Physics, 2016-2020

University of California, Los Angeles

Born in Tashkent, Uzbekistan, Jack spent most of his formative years across the United States, from Orlando, to Philadelphia, to glamorous Fresno. While he always enjoyed science, it wasn’t until freshman year at UCLA where he developed a serious interest (unhealthy obsession) in quantum mechanics and materials science when he discovered that it explained how day-to-day electronics functioned. His curiosity led to research in Sarah Tolbert’s lab, where he synthesized multiferroic nanocrystals for applications in memory devices. His interest in being able to "see" the submicron world led to work in the structural characterization of semiconducting polymers and, eventually, research in Naomi Ginsberg’s UC Berkeley lab on the self-assembly of rubrene spherulites. Jack is excited to return to the East Coast and is looking forward to finding a reliable food truck to fuel his neverending desire for cheap comfort food.


2020 - present

BS Chemistry, 2016-2020

University of Texas at Austin

Inki was born in South Korea and hails from Denton, Texas. He became interested in chemistry when he was in high school, and in college he began to enjoy studying physics and math. At UT Austin, he worked with Dr. Sean Roberts to investigate energy transfer from lead sulfide quantum dots to organic molecules using ultrafast spectroscopy. Although a large portion of his research consisted of synthesis and characterization, he particularly enjoyed studying light-matter interactions. Inki likes to watch Netflix in his free time, and he is excited to move to the Big Apple!



2021 - present

NSF Graduate Research Fellow

BS Materials Science, 2017-2021

Northwestern University

Paul was forged in the suburban wastelands of northern New Jersey, where he was always interested in science and engineering (yes, he did, in fact, go to science camp during the summer). He did his undergrad at Northwestern University near Chicago, where he studied materials science with a minor in art history, and worked as an undergraduate researcher under the mentorship of Mark Hersam and Emily Weiss. After first being exposed to spectroscopy in the Weiss lab, Paul thought it was pretty neat, so he came back to the Northeast for Columbia's chemical physics program. Outside of research, Paul loves music, movies, reading, and being beaten by his friends at chess.



2022 - present


BS Chemistry, 2014-2018
MEd Curriculum and Instruction, 2018-2019

University of Maryland, College Park

Andrea has had an affinity for science and art since childhood. She attended the University of Maryland, College Park as a chemistry major. It was there she began her research experience in Dr. John Fourkas’ group, studying the interfacial organization of liquids using vibrational sum frequency generation spectroscopy under the mentorship of Dr. Amanda Souna. Along with her burgeoning interest in research, Andrea’s passion for teaching led her to become a middle school science teacher for three years, a position which she loved and where she established lasting friendships. She is excited for her time in graduate school at Columbia, and is grateful for the people who have and continue to believe in her. Outside of work, she enjoys outdoor strolls in the park, quality time with friends and family, cooking, knitting, and bookmarking places to eat on Google Maps.



2022 - present

NSF Graduate Research Fellow

BS Chemistry, 2018-2022
Bard College

Stuck in the suburbs of Pelham, Alabama, Michelle grew up dancing ballet, attending night sessions at a local photography school, and painting stills to pass the time. Moving to NYC on a whim, she received her A.A. at Bard High School in Manhattan and later, her B.A. in Chemistry near the snowy Catskills of upstate New York at Bard College, where she worked in the Anderson lab to characterize the luminescence of Pt/Ni based complexes. In the Delor group, she uses ultrafast microscopy to study energy transport in semiconducting materials.



2023 - present


BS Chemistry, 2019-2023
University of Chicago

Sarah was born and raised in Lincoln, Nebraska before moving to Chicago to study chemistry at the University of Chicago. While there, she worked in Professor Sarah King's ultrafast spectroscopy group probing excited state dynamics in 2D TMDs and organic-TMD heterostructures using transient reflectivity. She is thrilled to continue her studies working in the Delor Group at Columbia University. Outside of lab, Sarah enjoys writing, trying new food and caring for her extensive collection of houseplants.



2023 - present


BS Chemical Engineering, 2018-2022
University of California, Berkeley

From San Diego originally, Noah stuck around California to complete his B.S. in chemical engineering, with a minor in city and regional planning, at UC Berkeley. During his undergraduate years, he worked at Lawerence Berkeley National Laboratory with Dr. Jason Cooper on the synthesis and spectroscopic characterization of CO2 reduction reaction photocatalysts. After then spending a year at École polytechnique fédérale de Lausanne under the supervision of Professor Raffaella Buonsanti to continue research on CO2RR, there in the context of colloidally-synthesized nanocrystal electrocatalysts, Noah is now excited to investigate light-matter interactions and electron transport at a more fundamental level. When not in the lab, Noah enjoys playing soccer, science journalism, and exploring New York City, if not struggling with the lack of sunny weather.

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2023 - present (joint with Roy lab)

BS Chemical Engineering & Materials Science, 2016-2019

MS Chemical Engineering & Materials Science, 2019-2021
Ewha Womans University

Yoon was born and raised in Seoul, South Korea. She completed her bachelor's and master's degrees at Ewha Womans University, where she delved into the fascinating realm of halide perovskites with a particular emphasis on their applications in producing light. With a thirst for broader experiences, Yoon made her way to New York and joined the Delor and Roy labs. Her mission is to bridge the disciplines of physics, chemistry, and engineering in her research. Outside the lab, Yoon takes pleasure in the simple joys of food, particularly those that include raisins, such as oatmeal raisin cookies and cinnamon raisin bagels.



2023 - present (joint with Roy lab)

BS Chemistry, 2019-2023
Princeton University

Born and raised in Brazil, André majored in Chemistry at Princeton, where he investigated the (in)stability of lanthanide antimony tellurides under Prof. Leslie Schoop. André moved up to New York as a joint student in the Delor and Roy Groups, where he is interested in imaging energy transport in solids to guide material synthesis. Beyond the lab, he obsesses with fixing electronics, biking NYC boroughs, and reading cognitive psychology.

Undergraduate Students



2023 - present

BA Chemistry, 2022 -

Columbia University

Born in Los Angeles, Kayla is a Californian who grew up in the glorious sunshine of Southern California. In her hometown of Hesperia (where snow and humidity are non-existent), Kayla has always been enthralled with the way science describes everything around us, from the smallest molecules to the realm of quarks. As a Columbia College student ('26), she is majoring in Chemistry with a concentration in Classics. In her free time, you'll find Kayla strumming her guitar, catching up on her favorite movies, or diving into a good book - anything and everything is fair game.

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