Implementing an Accurate and Rapid Sparse Sampling Approach for Low-Dose Atomic Resolution STEM Imaging
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Duke Univ., Durham, NC (United States)
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Univ. of Washington, Seattle, WA (United States)
Aberration correction for scanning transmission electron microscopes (STEM) has dramatically increased spatial image resolution for beam-stable materials, but it is the sample stability rather than the microscope that often limits the practical resolution of STEM images. To extract physical information from images of beam sensitive materials it is becoming clear that there is a critical dose/dose-rate below which the images can be interpreted as representative of the pristine material, while above it the observation is dominated by beam effects. Here we describe an experimental approach for sparse sampling in the STEM and in-painting image reconstruction in order to reduce the electron dose/dose-rate to the sample during imaging. By characterizing the induction limited rise-time and hysteresis in scan coils, we show that sparse line-hopping approach to scan randomization can be implemented that optimizes both the speed of the scan and the amount of the sample that needs to be illuminated by the beam. The dose and acquisition time for the sparse sampling is shown to be effectively decreased by factor of 5x relative to conventional acquisition, permitting imaging of beam sensitive materials to be obtained without changing the microscope operating parameters. As a result, the use of sparse line-hopping scan to acquire STEM images is demonstrated with atomic resolution aberration corrected Z-contrast images of CaCO3, a material that is traditionally difficult to image by TEM/STEM because of dose issues.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States). Environmental Molecular Sciences Laboratory (EMSL)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1332608
- Alternate ID(s):
- OSTI ID: 1329496
- Report Number(s):
- PNNL-SA--120342; 49204; KP1704020
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 16 Vol. 109; ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
A sub-sampled approach to extremely low-dose STEM
Automating STEM Aberration Correction via Bayesian Optimization
The Potential for Bayesian Compressive Sensing to Significantly Reduce Electron Dose in High Resolution STEM Images
Journal Article
·
Sun Jan 21 23:00:00 EST 2018
· Applied Physics Letters
·
OSTI ID:1421341
Automating STEM Aberration Correction via Bayesian Optimization
Journal Article
·
Fri Jul 21 20:00:00 EDT 2023
· Microscopy and Microanalysis
·
OSTI ID:2234070
The Potential for Bayesian Compressive Sensing to Significantly Reduce Electron Dose in High Resolution STEM Images
Journal Article
·
Mon Feb 10 23:00:00 EST 2014
· Journal of Electron Microscopy, 63(1):41 - 51
·
OSTI ID:1129350