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Access to Ultrafast Surface and Interface Carrier Dynamics Simultaneously in Space and Time

J. Zhao, R. O. Nughays, O. M. Bakr, O. F. Mohammed, Journal of Physical Chemistry C 125, 14495–14516 (2021).

Crystallographic Orientation-Dependent Photoresponse of Planar Cadmium Telluride X-ray Detectors

L. Wang, R. O. Nughays, X. Song, T. Bian, M. N. Hedhili, J. Yin, O. M. Bakr, O. F. Mohammed, Cell Reports Physical Science 4, 101723 (2023).

Visualization of Charge Carrier Diffusion Lengths in Perovskite Single Crystals

Poster Presentation — SPIE Photonics West, 2023. Conference proceeding demonstrating direct real-space visualization of surface carrier diffusion lengths in single-crystal perovskites using ultrafast electron imaging.

Visualization of Surface Charge Carrier Diffusion Lengths in Different Perovskite Crystal Orientations Using 4D Electron Imaging

R. O. Nughays, C. Yang, S. Nematulloev, J. Yin, G. T. Harrison, J. Zhao, S. Fatayer, O. M. Bakr, O. F. Mohammed, Advanced Optical Materials (2023).

Real-space Mapping of Carrier Dynamics in CdTe Crystals: From 4D Electron Imaging to X-ray Detectors

Poster Presentation — International Microscopy Congress (IMC-20), 2023. Poster presentation demonstrating real-space visualization of carrier transport in CdTe crystals using 4D ultrafast electron microscopy and its implications for X-ray detector performance.

Mapping Surface Defects and Ion Migration in Mixed-Cation Perovskite Crystals

R. O. Nughays, K. Almasabi, S. Nematulloev, L. Wang, T. Bian, I. Nadinov, B. Irziqat, G. T. Harrison, S. Fatayer, J. Yin, O. M. Bakr, O. F. Mohammed, Advanced Science (2024).

Leveraging 4D-USEM in Probing Charge Carriers at the Surface of Single-Crystal Perovskites

Oral Presentation — MRS Fall Meeting, 2024. Oral presentation demonstrating how four-dimensional ultrafast scanning electron microscopy (4D-USEM) enables direct visualization of surface-specific carrier dynamics and interfacial transport in single-crystal perovskites.

Spatiotemporal Imaging of Photogenerated Charge Carriers in Optoelectronic Materials

L. Wang, R. O. Nughays, O. F. Mohammed, Matter (2025).

Visualizing and Modulating the Surface Carrier Dynamics of Tellurium–Selenium Nanocomposites

R. O. Nughays,, C. Xing, G. Deokar, N. Wehbe, Y. Zhang, P. Maity, S. Nematulloev, L. Gutiérrez-Arzaluz, A. M. El-Zohry, S. Zhang, J. Li, X. Fu, J. Zhao, Journal of Physical Chemistry C (2025).

Talk 1 on Relevant Topic in Your Field

Published: March 01, 2012

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Tutorial 1 on Relevant Topic in Your Field

Published: March 01, 2013

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Talk 2 on Relevant Topic in Your Field

Published: February 01, 2014

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Conference Proceeding talk 3 on Relevant Topic in Your Field

Published: March 01, 2014

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Teaching experience 1

Undergraduate course, University 1, Department, 2014

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Teaching experience 2

Workshop, University 1, Department, 2015

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