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Cong SUCong Su

2019-2021 Postdoctoral Fellow

Faculty Advisor: Prof. Alex Zettl

Cong Su is a Heising-Simons Postdoctoral Fellow in the Physics Department, appointed from Fall 2019 to Fall 2021. His research focuses on modifying and controlling atomic-level structures in two-dimensional materials, including doping in the fabrication process, and modification using high energy electron beam after materials are made. Cong Su receives his Ph.D. degree in Nuclear Science and Engineering from MIT in 2019, and a Bachelor's in physics from Yuanpei College, Peking University in 2013.

Peng Cheng ChenPengcgeng Chen

2019-2021 Postdoctoral Fellow

Faculty Advisor: Prof. Peidong Yang

Pengcheng Chen is a Heising-Simons Postdoctoral Fellow in the Department of Chemistry, appointed from Spring 2019 to Spring 2021. His research focuses on developing a hybrid nanocatalyst system that integrates semiconductor nanowires and multimetallic nanocrystals. The inherent properties of nanowire arrays, including large surface area and enhanced light scattering/absorption, make nanowire arrays attractive platforms to explore the synergy between multiple metals in a nanocrystal co-catalyst. Nanowires and nanocrystal co-catalysts will be combined to develop superior catalytic systems that increase the sustainability and efficiency of reactions such as water splitting, carbon dioxide reduction, and nitrogen reduction.

Before joining Kavli ENSI, Pengcheng received his Ph.D. in materials science and engineering from Northwestern University. His past research focuses on using scanning probe nanolithography to combinatorially synthesize polyelemental nanostructures and studying the phase-separation behavior of multiple metals at the nanoscale.

Shaowei LiShaowei Li

2018-2020 Post Doctoral Fellow

Faculty Advisor: Prof. Michael Crommie

Shaowei Li is a Heising-Simons Postdoctoral Fellow in the Physics Department, appointed from Fall 2018 to Fall 2020. His research focuses on developing a novel imaging technique combing laser and a scanninbg tunneling microscope (STM) to shatter the diffraction limit and probe the inhomogeneous properties in low dimensional materials. The desire for observing finer details using optical microscopy particularly in bio-science and material-science is pushing technology developments beyond the diffraction limit. The coupling of photon excitation with electron tunneling at the junction of a scanning tunneling microscope combines the femtosecond sensitivity of a laser and the Angstrom resolution of tunneling electrons. The joint fs-A resolution will provide a new window for viewing the unique ultafast dynamics of individual nano-scale objects.

Shaowei received his Ph.D. in physics from UC Irvine in 2017. Prior to that, he received his bachelor degree in physics from Nankai University in 2010. He spent a year as a postdoctoral fellow at Northwestern University before joining ENSI. His past work involves probing the physcial and chemical properties of single molecules and low-dimensional materials with optical techniques and STM.

Luis Pazos


2017-2019 Post Doctoral Fellow 

Faculty Advisor: Prof. Eli Yablonovitch

Luis Pazos-Outon was awarded a Heising-Simons Postdoctoral Fellowship, to work at the electrical engineering department from Fall 2017 to Fall 2019. He is currently working on the development of two different, yet strongly related, projects: A thermophotonic bottle for vaccine delivery and a thermophotovoltaic device. The former uses ultra efficient LEDs to cool the inner layer of a thermos bottle to keep its contents at stable temperatures for long periods, this can be critical for vaccine delivery in developing countries. The latter aims to transform heat into electricity, using light as the heat transfer medium. This could allow to create ultralight engines for spaceship applications.

Luis’s previous work at the University of Cambridge focused on photovoltaic materials. He studied the optoelectronic properties of lead halide perovskites, and developed structures to combine singlet fission organic materials with classic inorganic semiconductors, such as crystalline silicon. 



2019-2020 Philomathia Graduate Student Fellow

Faculty Advisor: Prof. Naomi Ginsberg

Trevor's work focuses on uncovering the mechanisms of energy transport in a range of light harvesting materials using ultrafast spectroscopy techniques. Correlating such materials’ morphology with their energetic landscape and transport functionality necessitates optical resolution on both spatial scales relevant to structural heterogeneities and temporal scales relevant to transport in the vicinity of such heterogeneities. By utilizing a time-resolved ultrafast super-resolution microscopy technique (time-resolved ultrafast STED, or TRUSTED), we have the capability to probe both the relevant time and length scales of excitation diffusion to characterize the extent structural anomalies like defects impede energy transport. In collaboration with the Alivisatos group, he will study semiconductor nanocrystal assemblies with varying degrees of predicted electronic coupling to elucidate the nature by which and the degree to which defects hamper energy transport in these distinct regimes.


2019-2020 Philomathia Graduate Student Fellow

Faculty Advisor: Prof. Paul Alivisatos

Justin’s work focuses on understanding imperfect oriented attachment of semiconductor nanocrystals using transmission electron microscopy (TEM).  Oriented attachment can be used to fuse individual nanocrystals into arrays of attached nanocrystals with long range crystallographic coherence. Unfortunately, improper attachment events can lead to dislocations and other structural defects which often have undesirable electronic properties.  Justin uses in-situ TEM to observe these defective interfaces while the defects are being annealed out of the material. The goal is to identify ideal attachment conditions to avoid defect formation, or if they are to form, have an easy way to be removed from the material. Once this is achieved, he intends to explore the potentially exotic electronic properties attached semiconductor nanocrystals are predicted to have. 



Archana RajaArchana Raja

2017-2019 Post Doctoral Fellow

Previous Faculty Advisor: Prof. Paul Alivisatos

Current Position: Project Scientist, LBNL 



Patrick GallagherPatrick Gallagher

2016-2018 Post Doctoral Fellow

Previous Faculty Advisor: Prof. Feng Wang

Current Position: Scientist, Stealth-Mode






2018-2019 Philomathia Graduate Student Fellow

Previous Faculty Advisor: Prof. Alex Zettl 

Current Position: Grad Student Researcher, Department of Physics, UC Berkeley




2017-2018 Philomathia Graduate Student Fellow                                                                                                                             

Previous Faculty Advisor: Prof. Omar Yaghi

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