Ke Xu Group


Principal Investigator

Ke Xu
xuk at

Ke Xu is an assistant professor of Chemistry and a Chan-Zuckerberg Biohub Investigator at UC-Berkeley. Ke received his B.S. from Tsinghua University, did his Ph.D. work with Prof. Jim Heath at Caltech, and his postdoc work with Prof. Xiaowei Zhuang at Harvard University. Ke joined the College of Chemistry at UC-Berkeley in the summer of 2013. His current research develops new physicochemical tools to interrogate biological, chemical, and materials systems at the nanoscale with extraordinary resolution, sensitivity, and functionality. To this end, his lab takes a multidimensional approach that integrates advanced microscopy, spectroscopy, cell biology, and nanotechnology. Ke is a Sloan Research Fellow, a Packard Fellow for Science and Engineering, a Beckman Young Investigator, and a Pew Biomedical Scholar, and has received an NSF CAREER Award, an NIH Director's New Innovator Award, and the Talented 12 by C&EN.

Post-doctoral Researchers

Wan Li
wl285 at

Wan obtained her bachelor and master degrees in physics from Tsinghua University, working on spin-transport theories. She obtained her Ph.D. degree from Cornell University in 2013, where she worked with Prof. Dan Ralph on graphene electrochemistry and spintronics. After a 2-year postdoc in Prof. Jay Groves' lab at UC-Berkeley, where she integrated graphene with bio-mimicking supported lipid bilayers, she joined Xu lab in 2015. She currently works on high-contrast visualization of graphene on transparent substrates, but also has broad interests in the chemistry and opitcal characterization of 2D materials.

Limin Xiang
lxiang2 at

Limin graduated from Peking University in 2010 with a Bachelor degree of Science in Chemistry. He obtained his Ph.D in Chemistry in 2016 from Arizona State University where he worked in Prof. Nongjian Tao's group. During his Ph.D study his researches mainly focus on single molecular electronics especially for DNA using STM break junction technique. He joined the Xu Group in 2016 and his current research interests involve combining STORM technique with electric and force measurements, to study the interplay between optical, electric and mechanic properties on the single molecular level.

Kun Chen
chenk at

Kun obtained his bachelor degree in optoelectronic science from Nankai University in 2013 working on optical clearing and laser-tissue interaction with Prof. Yanmei Liang. He earned his Ph.D at Tsinghua University in 2017 under the supervision of Prof. Yan Li, where he explored femtosecond optical frequency lasers and developed novel ultra-speed and broadband coherent anti-Stokes Raman spectroscopy and microscopy for label-free molecular detection. In 2017, he joined the Xu Group at Berkeley and his current researches focus on development of innovative optical and single-molecule spectroscopy.

Jeongmin Kim
jmk at

Jeongmin earned his BS and MS in mechanical engineering with specialization in optomechatronics in Korea, and had worked as an optical engineer in Samsung Electronics for 2006-2011. He joined Prof. Xiang Zhang group at UC Berkeley for his PhD (2016) and two-year postdoc, where he studied advanced optical microscopy methods and novel nanophotonic systems based on plasmonics, metamaterials and III-V photonics. He joined the Xu Group in 2019 to develop single-molecule microscopy for tissue-level applications. His research interests include new optical microscopy/spectroscopy methods, optical tweezers, bio-lasers/sensing and cell mechanics.

Graduate Students

Rui Yan
rui.yan at

Rui graduated from Peking University in 2015. He joined the Xu group in Fall 2015.

Rui did his undergraduate research with Prof. Yongfen Qi, where he studied inflammatory response of macrophages in sepsis. He also did protein purification and yeast genetics. His interests include the dynamics of cytoskeletal architecture during neuronal development and biological applications of super-resolution microscopy.

Bowen Wang
bowenwang.bioeng at

Bowen graduated from University of California, Berkeley in 2017. He joined Ke Xu Group in Fall 2017.

Bowen did his undergraduate research with Prof. Adam Arkin and Prof. Luke P. Lee, where he investigated bacterial genomic engineering and ultrafast photonic PCR. His current interests involve investigating nano-scale cellular structure using super-resolution microscopy and developing novel imaging method for biological science.

Yunqi Li
yunqili at

Yunqi graduated from Tsinghua University in 2017. She joined the Xu lab in Fall 2017.

Yunqi did her undergraduate research with Prof. Jinghong Li, where she studied graphene oxide hydrogel materials for the adsorption of water pollutants. Her current interests involve studying graphene materials using optical microscopy.

Bret Unger
b.unger at

Bret graduated from West Chester University in 2018. He joined the Xu group in Fall 2018.

Bret did his undergraduate research with Prof. Kurt Kolasinski where he investigated the formation of novel silicon nanostructures using electrochemical and laser-assisted processes. His current research interests include improving the capabilities of super-resolution microscopy as well as biological applications of super-resolution microscopy.

Ha Park
ha.park at

Ha graduated from Seoul National University in 2018.

Ha did his undergraduate research with Prof. Jwa-Min Nam, where he studied behaviors of nanostructures on supported lipid bilayers. In his work on developing logic computing platform, he established an image analysis pipeline for the system.

Alex Choi
achoi45 at

Alex graduated from the Georgia Institute of Technology in Spring 2019 with a B.S. in Chemistry. He joined the Xu Lab in Fall 2019.

Alex worked with Prof. Ronghu Wu in the Department of Chemistry and Biochemistry developing methods to study low-abundance glycoprotein using mass spectrometry. His current research interests are the development and application of microscopy techniques to study the physics of biological systems.


Min(Helen) Yang
helen.minyang at

Helen joined the group in Summer 2019. She is a member of U.C. Berkeley College of Natural Resources Class of 2022 and is majoring in Nutritional Science and Toxicology and minoring in Chemistry.


Seonah Moon
seonah.moon at

Seonah was a graduate student in the Xu group from 2014, and graduated in 2019 with her Ph.D. In the Xu group, her research focused on implementing new methods for spectrally-resolved super-resolution microscopy and applying them to biological systems. She also took part in a few graphene-related projects. She is now a Yield Engineer at Intel Corporation in Hillsboro, Oregon.

Meghan Hauser
meg.hauser at

Meghan joined the Xu group in Fall 2013, graduated with her Ph.D. in 2017, and then briefly stayed as a postdoc. Her research focused on the development of correlative microscopy methods and the application of super-resolution microscopy to both biological and inorganic materials systems. She is now an analyst at the boutique consulting firm, Clark Street Associates, in Mountain View, where she works with companies in the technology industry to optimize their businesses.

Sam Kenny
sjkenny1 at

Sam was a graduate student in the Xu group from 2013 to 2018. His research encompassed the development of multicolor super-resolution microscopy and image analysis methodologies, as well as their application to cellular membranes and other biological systems. He is now a data scientist at Faire, a San Francisco-based wholesale retail company.

Michal Wojcik
mwojcik at

Michal started his graduate studies as Prof. Xu's first student during the summer of 2013, and graduated with his Ph.D. in 2018. In the Xu Lab, he played a key role in the development and application of multiple novel microscopy techniques to biological and materials systems. He is currently a Life Sciences Specialist at L.E.K. Consulting in Los Angeles.

Doory Kim
kim33 at

Doory was a postdoc in the Xu Lab from 2016 to 2017, where she extended spectrally resolved STORM to single-molecule reactions [Link]. She is starting her new lab at Hanyang University.

Leiting Pan
peterpan at

Leiting Pan was a visting scholar in the Xu Lab from December 2015 to December 2016, where he led super-resolution microscopy work on erythrocytes [Link]. He is currently an associate professor of Nankai Univerisity, China.

Zhengyang Zhang
zhengyang at

Zhengyang was a postdoc in the Xu Lab from 2014 to 2016, where he led the development of spectrally resolved STORM super-resolution microscopy [Link]. Zhengyang is now starting as a lecturer in the Department of Chemistry at Nanyang Technological University.

Undergrad Alumni

Xuyan (Shirley) Chen
Zhiheng Zhao
Manni He
Yennie Shyu Albert Chiu