From Northwestern University Center for Atom-Probe Tomography
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Welcome to the Seidman Research Group

Northwestern University Center for Atom-Probe Tomography (NUCAPT).


Al-Sc-RE precipitates

Three-dimensional LEAP tomographic reconstructions of Al–0.06 Sc–0.02 Tb and Al–0.06 Sc–0.02 Tm (at.%) aged for: (a) 10 minutes, and (b) 24 hours at 300 °C. Each reconstruction is divided into three sections, with Sc atoms only displayed in the leftmost section, rare earth (RE) atoms only displayed in the center section, and both Sc and RE atoms displayed in the rightmost section. After 10 minutes aging time, nanometer-sized RE-rich Al3(RE1-xScx) precipitates have formed. With continued aging to 24 hours, a core-shell structure is evident in the precipitates, with a RE-rich core surrounded by a Sc-rich shell.

(Courtesy: Matt Krug)


  • A short video describes NUCAPT and the new data management and publication service, developed in collaboration with CHiMAD-MDF.
  • The new NUCAPT data server manager is online now and can be accessed at NUCAPT Data Server
  • Our LEAP tomograph has been upgraded in 2017 to a LEAP5000XS configuration (CAMECA), featuring a single-atom position-sensitive time-of-flight detector with approximately 80% detection efficiency, compared to 50% efficiency with our old LEAP4000 instrument before the upgrade.
  • 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.


Recent articles from the Seidman group