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Northwestern University Center for Atom-Probe Tomography


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NUCAPT is a research facility at Northwestern University directed by Prof. David N. Seidman and managed by Research Prof. Dieter Isheim. NUCAPT specializes in high-resolution chemical imaging by three-dimensional atom probe tomography (APT). APT produces a three-dimensional (3D) atom-by-atom chemical image with sub-nanometer spatial resolution of a sample volume typically 100 x 100 x 300 nm^3, by simultaneous high resolution imaging and atom-by-atom time of flight mass spectrometry. APT is particularly suited to study nano- or nanostructured materials.

The VG FIM100 atom-probe field-ion microscope (APFIM) is now on display in Terminal 1 at O'Hare Airport, in the concourse opposite gate B12. It was moved to O'Hare Airport to spend its retirement days among applications of the high-performance structural and areospace materials it helped develop.

VG FIM100 at O'Hare 20160525 075621 smaller.jpg

Photo credit: Dr. Nhon Vo

NUCAPT had originally donated the VG FIM100 APFIM to Chicago's Museum of Science and Industry where it anchored the exhibition Materials Science at MSI (press kit). The Chicago Tribune ran an article about the exhibition "Materials Science" at the MSI on March 25, 2015.

more research nuggets


  • Congratulations to both Divya Jain and Sumit Bhattacharya, on the successful defense of their thesis. Good luck, Doctors!
  • The Seidman Group welcomes Francesca Long, a first year graduate student in the department.
  • The Seidman Group welcomes visiting student Dong An from Southeast University.



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