= High resolution electron energy loss spectroscopy
{wiki=High_resolution_electron_energy_loss_spectroscopy}
High Resolution Electron Energy Loss Spectroscopy (HREELS) is a surface-sensitive analytical technique used to study the electronic and vibrational properties of materials, particularly surfaces and thin films. It involves the scattering of low-energy electrons (usually in the range of a few electron volts) from a material's surface, which provides detailed information about the energy levels of electrons in the material as well as various phonon modes (vibrations of the lattice).
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