Abstract
The high surface sensitivity and controlled surface charge state of submicron sized droplets is exploited to study low-energy electron transport through liquid interfaces using photoelectron imaging. Already a few charges on a droplet are found to modify the photoelectron images significantly. For narrow escape barriers, the comparison with an electron scattering model reveals pronounced quantum effects in the form of above-barrier reflections at electron kinetic energies below about 1 eV. The observed susceptibility to the characteristics of the electron escape barrier might provide access to these properties for liquid interfaces, which are generally difficult to investigate.
- Received 23 August 2019
DOI:https://doi.org/10.1103/PhysRevLett.124.013402
© 2020 American Physical Society
Physics Subject Headings (PhySH)
Focus
Catching Electrons as They Escape a Liquid
Published 10 January 2020
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