Energy-drift correction of electron energy-loss spectra from prolonged data accumulation of low SNR signals
- 25 July 2008
- journal article
- Published by Oxford University Press (OUP) in Journal of Electron Microscopy
- Vol. 57 (5), 149-158
- https://doi.org/10.1093/jmicro/dfn014
Abstract
The demand for analysis of trace elements in atomically localized areas by electron energy-loss spectroscopy (EELS) in transmission electron microscopy is increasing. Unfortunately, the prolonged data acquisitions required to achieve an acceptable signal-to-noise ratio (SNR) tend to deteriorate the energy resolution because of spectral drifts due to instrumental instability. We developed a macroscript for a Gatan Digital MicrographTM to control an ENFINA 1000 EEL spectrometer that corrects for energy drifts during data accumulation. The script successfully achieved a core-loss spectrum for a sample having ∼1 at% elemental concentration, and provided a sufficient SNR for chemical state analysis.Keywords
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