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Prospects for Vibrational-Mode EELS with High Spatial Resolution

Published online by Cambridge University Press:  19 February 2014

R.F. Egerton
R.F. Egerton*
Affiliation:
Physics Department, University of Alberta, Edmonton, Canada T6G 2E1
*
*Corresponding author. [email protected]
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Abstract

Taking advantage of previous measurements by Geiger and co-workers, we discuss the possibilities and problems of measuring vibrational modes of energy loss in a transmission electron microscope fitted with a monochromator and a high-resolution energy-loss spectrometer. The tail of the zero-loss peak is seen to be a major limitation, rather than its full-width at half-maximum. Because of the low oscillator strengths and small cross-sections involved, radiation damage will limit the spatial resolution if this technique is applied to organic specimens. Delocalization of the inelastic scattering may also be a limitation, if a dipole description of the scattering process is valid.

Keywords

TEMEELSvibrational energy lossmonochromatorsdelocalizationradiation damage
Type
EDGE Special Issue
Information
Microscopy and Microanalysis , Volume 20 , Issue 3 , June 2014 , pp. 658 - 663
Copyright
© Microscopy Society of America 2014 

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