Maarten Wirix: Integrated Differential Phase Contrast (iDPC) STEM for low Z detection and for high contrast low dose imaging applications
YUCOMAT & WRTCS 2022
YUCOMAT & WRTCS 2022
Herceg Novi, Montenegro, 2022
YUCOMAT & WRTCS 2022
Openning
YUCOMAT & WRTCS 2022
Ana Senos lecture
YUCOMAT & WRTCS 2022
Hamish L. Fraser lecture
YUCOMAT & WRTCS 2022
Poster Session
YUCOMAT & WRTCS 2022
Competition : : Best Poster Presentation
YUCOMAT & WRTCS 2022
Prof Uskokovic Welcome speech
YUCOMAT & WRTCS 2022
Herceg Novi, Montenegro, 2022
YUCOMAT & WRTCS 2022
Herceg Novi, Montenegro, 2022
YUCOMAT & WRTCS 2022
Board members
YUCOMAT & WRTCS 2022
Herceg Novi, Montenegro, 2022
YUCOMAT & WRTCS 2022
Audience
YUCOMAT & WRTCS 2022
Discussion
YUCOMAT & WRTCS 2022
Boat Trip
YUCOMAT & WRTCS 2022
Poster Session
YUCOMAT & WRTCS 2022
Vladimir Torchilin lecture
YUCOMAT & WRTCS 2022
Discussion
YUCOMAT & WRTCS 2022
Darya Farrokhnemoun
YUCOMAT & WRTCS 2022
MRS Serbia
YUCOMAT & WRTCS 2022
Discussion
YUCOMAT & WRTCS 2022
Herceg Novi, Montenegro
YUCOMAT & WRTCS 2022
Desk
YUCOMAT & WRTCS 2022
Dušan Tripković
YUCOMAT & WRTCS 2022
Herceg Novi, Montenegro
YUCOMAT & WRTCS 2022
Boat Trip
YUCOMAT & WRTCS 2022
Audience
YUCOMAT & WRTCS 2022
Yury Gogotsi lecture
YUCOMAT & WRTCS 2022
IISS

Maarten Wirix

 

Thermo Fisher Scientific, The Netherlands

 

One of the main challenges in conventional STEM techniques is the difficulty to fully image and interpret a lattice consisting of both high and low Z elements. While only high Z elements can be imaged in HAADF-STEM, (A)BF-STEM can display low Z elements, though atomic positions in the images are difficult to interpret as there is no clear contrast variation between different atoms (1).

Novel integrated differential phase contrast (iDPC) STEM imaging is instrumental in showing both low Z and high Z elements with clear contrast variation (2). iDPC STEM is based on center of mass (COM) based imaging (3), and its strength in simultaneous high and low Z detection has been shown experimentally in GaN (2, 4) and Ɣ-TiH (5) domains. Moreover, iDPC STEM images have also been shown to exhibit improved contrast in beam sensitive materials, exemplified with graphene (2).

In materials science, we are seeing an increasing particular interest in structures that are comprised of low Z elements and beam sensitive materials (i.e. 2D materials, zeolites, MOFs, etc.) requiring low dose imaging techniques. With an enhanced contrast as well as wide Z-range detection capability, iDPC STEM should be considered as the key sub-angstrom imaging method in these research areas.

  1. Bosch, E.G.T. et al. Ultramicroscopy, 2015, 156, 59-72.
  2. Lazić, I. et al. Ultramicroscopy, 2016, 160, 265-280.
  3. Müller, K. et al. Nat. Commun., 2014, 5, 5653.
  4. Yücelen, E. et al. Sci. Rep., 2018, 8, 2676.
  5. de Graaf, S. et al. arXiv:1812.09118.

Plenary lectures - YUCOMAT 2019

member since 2008