Thermo Fisher Talos F200X G2 Scanning Transmission Electron Microscope

Talos F200X G2 Scanning Transmission Electron MicroscopeThe scanning transmission electron microscope (S/TEM) with multiple energy dispersive spectrometers (EDS) and a High Angle Annular Dark Field (HAADF) detector is used to characterize materials on the nanoscale, enabling their exploitation in applications relevant to energy conversion/storage, catalysis, microelectronics/sensing, medicine, and metallurgy.

This instrument provides:

  • Conventional TEM bright-field/dark-field imaging, electron diffraction, and high-resolution TEM imaging
  • Z-contrast (HAADF) imaging capability at 0.16 nm resolution;
  • Fast EDS elemental mapping
  • Acquisition of tilt series with TEM/STEM/EDS capability and 3D reconstruction
  • Alignments at both 200kV and 80kV for material and tissue samples, respectively

This instrument is both a user-based and fee-for-service instrument.


A. Paul Schaap Chemistry Building, Room 53

Statement of acknowledgment

The Talos F200X G2 S/TEM was funded through an NSF MRI grant. Please acknowledge the use of this instrument in your publications, presentations, and dissertations. A suggested statement can read: "This work made use of the Talos F200X G2 S/TEM that is funded in part through NSF MRI award #2018587."

User groups

  • Stephanie Brock group, Department of Chemistry
  • Long Luo group, Department of Chemistry
  • Shengyi (Iris) Sun group, School of Medicine
  • Leela Arava group, College of Engineering
  • Eranda Nikolla group, College of Engineering
  • Yingxi Elaine Zhu group, College of Engineering

User training

User training is scheduled with Dr. Mei through ( Training will be conducted in two parts: 1) TEM and 2) STEM.  Once user competency is demonstrated, the user will be able to perform experiments without supervision by scheduling through the instrument management system.


Batugedara, T. N.; Brock, S. L. “A Little Nickel Goes a Long Way: Ni Incorporation into Rh2P for Stable Bifunctional Electrocatalytic Water Splitting in Acidic Media,” ACS Materials Au, 2023 3, 299.

Amarasinghe, D. K.; Dissanayake, K. T.; Dhanapala, D. B.; Rabuffetti, F. A. “Local atomic environment of Yb3+ in alkaline-earth fluorohalide nanocrystals,” CrystEngComm, 202224, 531.

Yang, J.; Wang, G.; Teixeira, A. P.; Silva, G. G.; Hansen, Z.; Jamal, M. J. M.; Mathew, K.; Xiong, J.; Zhou, T.; Mackowiak, M.; Fleming, P. D.; Wu., Q. “A biomass-based cathode for long-life lithium-sulfur batteries,” Electrochemistry Communications, 2022, 140, 107325.

Dhanapal, B. D.; Munasinghe, H. N.; Dissanayake, K. T.; Suescun, L.; Rabuffetti, F. A. “Expanding the synthetic toolbox to access pristine and rare-earth-doped BaFBr nanocrystals,” Dalton Transactions, 2021, 50, 16092.

Geng, X.; Li, S.; Mawella-Vithanage, L.; Ma, T.; Kilani, M.; Wang, B.; Ma, L.; Hewa-Rahinduwage, C. C.; Shafikova, A.; Nikolla, E.; Mao, G.; Brock, S. L.; Zhang, L.; Luo, L. “Atomically dispersed Pb ionic sites in PbCdSe quantum dot gels enhance room-temperature NO2 sensing,” Nature Communications, 2021, 12, 4895.