WELCOME TO DEL-LABS

Directing Electrons with Light

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LATEST NEWS

07/2021

The group welcomes MRSEC REU student Athena Stenor, who is joining us from Yale Chemical Engineering - welcome Athena!

06/2021

The group welcomes new postdoc James Baxter from Imperial College. James did his PhD in ultrafast protein crystallography using lots of super-cool optical and X-ray techniques - welcome to the group James!

05/2021

Ding, Vicky and Shan-Wen pass their second year defenses, congratulations all around!

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11/2020
Ding receives the well-deserved 2020-2021 Kasindorf Fellowship from Columbia for his outstanding 1st year achievements - congratulations Ding!

Read all news here.

 
RESEARCH

The efficient transport and interconversion of energy between photons, electrons, ions and heat underpins life on earth. In modern technologies ranging from solar panels to computers, batteries and health sensors, energy moves slowly, randomly and often inefficiently towards target conversion sites. We aim to direct energy flow in emerging materials in ways that are targeted and efficient, moving beyond random motion to unleash new paradigms for extracting more energy from solar panels, storing more energy in batteries, speeding up information transport and processing, and exploiting correlated electronic systems for new applications.

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We use light as a powerful stimulus to initiate, image and control electronic behavior in emerging materials on extreme spatiotemporal scales. Questions we explore include:

  • How do we image individual electrons moving and interacting with their surroundings in material lattices?

  • How do we control the direction and speed at which energy packets move towards functional targets?

  • How do we unlock exotic emergent phenomena and exploit them in modern devices?
     

The ongoing explosion of discoveries in quantum, meta- and nanomaterials provides the perfect platform for us to answer these questions now.

 

Super-resolution imaging

of electronic transport and material energy landscapes

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Optical control of nuclear-electronic coupling and energy flow on material mesoscales

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Optical manipulation of strongly correlated electronic behavior with confined light

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In the process of answering these questions, we invent new tools capable of non-invasively imaging events happening over femtoseconds to hours at the single-nanometer scale. These tools are often relevant to a broad range of scientific disciplines: think taking movies of self-assembling biological or material building blocks, of neurons emitting action potentials, and of non-dissipative electronic transport in superconductors.

In addition to gaining a deep fundamental understanding of light-matter interactions, students and postdocs in the group acquire experience in nonlinear optics, super-resolution microscopy, ultrafast visible, IR and terahertz spectroscopy, and materials design and characterization. We collaborate broadly with both theoretical and experimental research groups at Columbia and beyond.

THE TEAM

 
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SHAN-WEN CHENG

Graduate Student
 

sc4603@columbia.edu

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VICKY (HAOWEN) SU

Graduate Student
 

hs3140@columbia.edu

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MILAN DELOR

Assistant Professor
and Principal Investigator

 

milan.delor@columbia.edu

Postdoctoral scholar, 2016-2019

Ginsberg group, University of California, Berkeley

Doctoral Prize Fellow, 2015

​PhD Physical Chemistry, 2010-2014

Weinstein group, University of Sheffield​

BSc Chemistry, 2015-2019

National Taiwan University

BA Chemistry and Global Health, 2015-2019

Washington University in St. Louis

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DING XU

Graduate Student
 

dx2192@columbia.edu

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EILEEN MOUDOU

Undergraduate Student
 

em3218@columbia.edu

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JACK TULYAG

Graduate Student
 

jack.tulyag@columbia.edu

BSc Chemistry, 2014-2019

Wuhan University

​Visiting researcher, North Carolina
State University

BA Chemistry and Mathematics

Columbia University

BS Chemistry & Physics, 2016-2020

University of California, Los Angeles

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INKI LEE

Graduate Student
 

inki.lee@columbia.edu

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JAMES BAXTER

Postdoc
 

jmb2493@columbia.edu

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ATHENA STENOR

REU Student
 

as5272@columbia.edu

BS Chemistry, 2016-2020

University of Texas at Austin

PhD Chemistry, 2017-2021

Imperial College London (U.K.)

BS Chemical Engineering

Yale University

Read more about the team here.

We continue to look for motivated students and postdocs interested in spectroscopy, microscopy and materials science to join the group. Postdoc candidates have a strong background in chemical physics or physical chemistry and experience with one or a combination of the following: ultrafast spectroscopy, super-resolution microscopy, quantum materials, nonlinear optics. Contact Milan for more information.

SELECTED PUBLICATIONS

Delor M, Slavney A, Wolf N, Filip M, Neaton J, Karunadasa H, Ginsberg N (2020).

Carrier diffusion lengths exceeding 1 μm despite trap-limited transport in halide double perovskites

ACS Energy Letters, vol. 5, pp. 1337-1345.

Delor M, Weaver H, Yu Q, Ginsberg N (2020).

Imaging material functionality through 3D nanoscale tracking of energy flow

Nature Materials, vol. 19, pp. 56-62.

 

Delor M*, Dai J*, Roberts T*, Rogers J*, Hamed S, Neaton J, Geissler P, Francis M, Ginsberg N (2018).

Exploiting chromophore–protein interactions through linker engineering to tune photoinduced dynamics in a biomimetic light-harvesting platform

Journal of the American Chemical Society, vol. 140, pp. 6278–6287.

 

Delor M, Archer S, Keane T, Meijer A, Sazanovich I, Greetham G, Towrie M, Weinstein J (2017).

Directing the path of light-induced electron transfer at a molecular fork using vibrational excitation

Nature Chemistry, vol. 9, pp. 1099-1104.

 

Delor M, Keane T, Scattergood P, Sazanovich I, Towrie M, Meijer A, Weinstein J (2015).

On the mechanism of vibrational control of light-induced charge transfer in donor–bridge–acceptor assemblies

Nature Chemistry, vol.17, pp. 689-695.

 

Delor M, Sazanovich I, Towrie M, Weinstein J (2015).

Probing and exploiting the interplay between nuclear and electronic motion in charge transfer processes

Accounts of Chemical Research, vol. 48, pp. 1131-1139.

 

Delor M, Scattergood P, Sazanovich I, Parker A, Greetham G, Meijer A, Towrie M, Weinstein J (2014).

Toward control of electron transfer in donor-acceptor molecules by bond-specific infrared excitation

Science, vol. 346, pp. 1492-1495.

 
 

CONTACT

Columbia University
Department of Chemistry
3000 Broadway, 117 Havemeyer Hall
New York, NY 10027

Office: 506 Havemeyer

Lab: 117 Havemeyer

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