Time Resolved Annular Dark Field Imaging of Catalyst Nanoparticles [electronic resource].
- Washington, D.C. : United States. Dept. of Energy, 2009.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- PDF-file: 9 pages; size: 3.9 Mbytes
- Additional Creators:
- Lawrence Berkeley National Laboratory
United States. Department of Energy
United States. Department of Energy. Office of Scientific and Technical Information
- Dynamic transmission electron microscopy (DTEM) has the potential to provide insight into nanoparticle catalyst dynamics by obtaining direct images with high spatial and temporal resolution. To date, the limited signal to noise ratios attainable for dispersed nanoparticle samples have made such studies difficult to perform at the highest resolution. These limitations have been overcome by the fabrication of an annular objective lens aperture that permits images to be obtained with a 5 fold increase in the signal to background ratio. This annular dark field imaging mode is shown here to vastly improve the contrast attainable in 15ns pulsed electron images and allows particles as small as 30nm in diameter to be observed.
- Published through SciTech Connect.
ChemPhysChem, vol. 11, no. 10, May 27, 2010, pp. 2088-2090 11 10 ISSN 1439-4235; CPCHFT FT
Masiel, D J; Reed, B W; LaGrange, T B; Campbell, G H; Guo, T; Browning, N D.
- Funding Information:
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