Doctoral Students
Cheng-Yu Chen
Email: cychen97@seas.upenn.edu
Biography:
Cheng-Yu received a Bachelor’s degree in in 2019 and a Master’s Degree in 2021 in Materials Science and Engineering at from the National Taiwan University. He joined the group at Penn in the Fall of 2022.
Research Interest:
During his Master’s studies, his research focused on reconstructing 3D microstructures by electron tomography using HAADF-STEM images. He will be researching the degradation processes of supported nanocatalyst systems through in-situ TEM imaging, combined with automated image analysis through machine learning methods.
Yinuo (Nelly) Zhang
Email: zhyinuo@seas.upenn.edu
Biography:
Yinuo received a Bachelor’s degree in 2021 from the Qingdao University of Science and Technology and received a Master’s degree in 2023 from the University of Pennsylvania. She joined the Stach’s group at Penn in the Summer of 2023 and is co-advised by Dr. Troy Olsson in ESE department.
Research Interest:
During her Master’s studies, her research focused on improving the ferroelectric switching performance of AlScN thin films by manipulating deposition gas flow. She will be researching the strategies to lower the coercive field and improve the endurance of AlScN memory devices as well as understanding the failure mechanism of thin film memory devices through electron microscopes.
Erika Ortega Ortiz
Email: eoo@seas.upenn.edu
Biography:
Erika joined the group in Fall of 2022, after receiving her Bachelors at Harvard University in the Spring of 2022.
Research Interest:
Prior to Penn, Erika focused on optimizing the growth of transparent conductive oxides through molecular beam epitaxy and sputtering, or a combination of both techniques, guided by analysis using XRD and AFM. At Penn, her current focus is on exploring the surface attachment of molecular catalysts using STEM.
Swarnendu Das
Email: sdas2001@seas.upenn.edu
Biography:
Swarnendu completed his Bachelors in Metallurgical Engineering from Indian Institute of Technology (BHU) Varanasi, India in 2023. He joined the Stach group at Penn in the Fall of 2023.
Research Interest:
Before joining Penn, Swarnendu focused on studying microstructural evolution and phase transformation in Inconel 625 produced by Laser Directed-Energy Deposition, by analysing XRD, SEM and TEM data.
George Hollyer
Email: ghollyer@seas.upenn.edu
Biography:
George received a bachelor’s degree in 2022 in Materials Science and Engineering from the University of Pennsylvania. Before joining the Stach group in the fall of 2023, he worked as a Research Engineer for Nelumbo Inc.
Research Interest:
During his bachelor’s degree, his research was in synthesis and STEM characterization of metallic core-shell nanoparticles for heterogenous catalysis. His current focus is on high-pressure in-situ TEM and machine learning for beam-sensitive materials as a Soft AE fellow.
