Kavli Affiliate: Scott K. Cushing
| First 5 Authors: Ye-Jin Kim, Levi D. Palmer, Wonseok Lee, Nicholas J. Heller, Scott K. Cushing
| Summary:
Electron energy-loss spectroscopy (EELS) can simultaneously measure similar
information to X-ray, UV-Vis, and IR spectroscopies but in one instrument with
atomic resolution. To date, EELS in a transmission electron microscope (TEM) is
mainly used to analyze local electronic states and chemical composition of
materials. Electron monochromators in the TEM have recently expanded EELS
capabilities to probe 10-100 meV elementary excitations such as phonons,
excitons, and magnons with few-meV resolution. High-resolution EELS (HR-EELS)
in a TEM can also easily be correlated with electron diffraction and
atomic-scale real-space imaging. By adding ultrafast temporal resolution to
HR-EELS, time-resolved EELS can replicate transient spectroscopies but with
nanoscale spatial resolution – directly measuring electronic and structural
dynamics at their intrinsic spatiotemporal and energy scale. Low-dose and
cryogenic approaches further expand EELS to the broader molecular and biology
scientific communities.
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