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The Future of EELS

The combination of an electron energy-loss spectrometer and a TEM provides us with physical and chemical information in the form of energy-loss spectra and energy-filtered images. The field-emission electron source has made an energy resolution below 1 eV possible and, combined with improvements in the design of electron spectrometers and detectors, it is now feasible to obtain useful data with a spatial resolution close to atomic dimensions, given the right kind of instrumentation and specimen [1,2].