Doctoral Students

James Horwath

E-mail: jhorwath@seas.upenn.edu

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Biography:

James graduated from Alfred University in Alfred, NY in May 2017 with a Bachelor’s degree in Glass Engineering Science. He joined the Stach group at the University of Pennsylvania in August of 2017 as a Ph.D. Candidate.

Research Interests:

James research focuses on the fundamental mechanisms of nano-scale coarsening in systems of supported nanoparticles. Assisted by machine learning for advanced image analysis, he use in-situ Transmission Electron Microscopy (TEM) to study local particle interactions, and morphological evolution. This work has applications in the field of industrial catalysis, where avoiding coarsening is essential for maintaining the activity of nano-catalyst materials.

Alexandre Foucher

E-mail: afoucher@seas.upenn.edu

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Biography:

Alexandre received a combined BS/MS in Mechanical and Industrial Engineering at Arts et Métiers ParisTech, France. He also completed a Master of Materials Science and Nanoengineering at Rice University in May 2017. He joined the group of Prof. Eric Stach at the University of Pennsylvania as a Ph.D. student in August of 2017.

Research Interest:

His research focuses on in-situ and operando diagnostics using electron microscopy in order to understand the evolution of bimetallic catalysts under working conditions. He is also working on electron pair-distribution analysis. Alexandre is part of the Integrated Mesoscale Architectures for Sustainable Catalysis (IMASC), an Energy Frontier Research Center (EFRC).

Vincent Antoine Verret

E-mail: vverret@seas.upenn.edu

Biography:

Antoine received his bachelor’s degree in Materials Science and Engineering in 2017 from the University of Pittsburgh. He joined the Stach group as a Ph.D. candidate in 2018.

Research Interest:

Before joining the Stach group, he did research on synthesis of Cu-Ag core-shell nano-particles for rapid circuit printing. In the Stach group, He is currently researching in-situ characterization of photocatalytic water splitting reactions inside TEM.

Hyeongjun Koh

E-mail: hjkoh@seas.upenn.edu

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Biography:

Jun received a Bachelor’s degree in 2016 and a Master’s degree in 2018 in Chemical and Biomolecular Engineering from Korea Advanced Institute of Science and Technology (KAIST). He is a Ph.D. candidate at University of Pennsylvania and joined Stach’s group in 2019.

Research Interest:

Before moving to Stach’s group, his research was focused on understanding the electrical behaviors of Ti₃C₂T_xMXene films upon gas exposure through in-situ XRD during his Master. In Stach’s group, he is currently interested in in-situ and ex-situ exploration of Li-metal batteries using Cryo-TEM.

Jeffrey Zheng

E-mail: jxzheng@seas.upenn.edu

Biography:

Jeffrey received a Bachelor’s degree in Materials Science and Engineering from Cornell University in 2019 and currently a Ph.D. candidate at University of Pennsylvania.

Research Interest:

His research involves studying nucleation and growth of ultra-thin ferroelectric materials film in order to develop correlations between interfacial interactions, process conditions, microstructure, and properties. He is co-advised by Prof. Eric Stach of MSE department and Prof. Troy Olsson of ESE department.