 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).