The Pan Research Group at the University of California, Irvine specializes in atomic-scale characterization and measurement using such techniques as ultra-high resolution transmission electron microscopy and in-situ microscopy where electrical and chemical experiments are conducted while being imaged in TEM, as well as scanning probe measurements, photoluminescence, and other techniques. Our research has applications in electronics, photovoltaics, ferroelectric memories and devices, catalysis, particularly for automotive applications, and lithium battery cathode materials.


07/2020 - NSF grants $18 million to UCI for materials science and engineering center with Prof. Pan as principal investigator.

10/2019 - UCI scientists reveal mechanism of electron charge exchange in molecules

06/2019 - UCI Scientists Create New Class of Two-dimensional Materials

01/2019 - UCI scientists develop method for observing nanocrystal formation at atomic resolution

Research Highlights

12/2019 - Xingxu Yan and Chaitanya Gadre published a paper in The Journal of Physical Chemistry C: Anomalous Linear Layer-Dependent Blue Shift of Ultraviolet-Range Interband Transition in Two-Dimensional MoS2

10/2019 - Wenpei Gao, Christopher Addiego, Xingxu Yan, Yi Zhang, Linze Li, Huaixun Huyan, and Thomas Blum published a paper in Nature: Real-space charge-density imaging with sub-ångstrom resolution by four-dimensional electron microscopy

9/2019 - Xingxu Yan and Chaitanya Gadre published a paper in Nano Letters: Unexpected strong thermally induced phonon energy shift for mapping local temperature

9/2019 - Lineze Li, Thomas Blum, Huaixun Huyan, Yi Zhang, Xingxu Yan, Chaitanya Gadre, and Mingjie Xu published a paper in Nano Letters: Observation of Strong Polarization Enhancement in Ferroelectric Tunnel Junctions

06/2019 - Wenpei Gao and Huaixun Huyan published a paper in Nature: Freestanding crystalline perovskites down to the monolayer limit

01/2019 - Wenpei Gao, Peter Tieu, and Chris Addiego published a paper in Science Advances: Probing the dynamics of nanoparticle formation from a precursor at atomic resolution


06/2018 - The Irvine Materials Research Institute (IMRI) is now open!

Seminars and Events

Our Interests:



Battery materials



Oxide Electronics