Measurement of the energy lost by transmitted electrons to electronic, vibrational or other excitations.
Fine structure near a core-loss edge that reflects unoccupied electronic states and local bonding.
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Electron Energy Loss Spectroscopy (EELS) is a powerful analytical technique used primarily in electron microscopy to study the elemental and electronic properties of materials at the nanoscale. It involves the interaction of high-energy electrons with a specimen. Here’s how it works and its key aspects: ### Principle: 1. **Electron Beam Interaction**: A high-energy electron beam is directed at a thin sample, usually a few nanometers thick, to minimize scattering and ensure that the beam can pass through the specimen.