Photoemission from Free Particles and Droplets

Intriguing properties of photoemission from free, unsupported particles and droplets were predicted nearly 50 years ago, though experiments were a technical challenge. The last few decades have seen a surge of research in the field, due to advances in aerosol technology (generation, characterization...

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Bibliographic Details
Published in:Annual review of physical chemistry 2020-04, Vol.71 (1), p.315-334
Main Authors: Ban, Loren, Yoder, Bruce L, Signorell, Ruth
Format: Article
Language:English
Subjects:
attosecond
condensed phase
Droplets
electron scattering
femtosecond
Imaging spectrometers
interface
Light sources
optical resonance
Photoelectric emission
photoelectron spectroscopy
Photoelectrons
Spectrometers
surface
Technology transfer
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Summary:Intriguing properties of photoemission from free, unsupported particles and droplets were predicted nearly 50 years ago, though experiments were a technical challenge. The last few decades have seen a surge of research in the field, due to advances in aerosol technology (generation, characterization, and transfer into vacuum), the development of photoelectron imaging spectrometers, and advances in vacuum ultraviolet and ultrafast light sources. Particles and droplets offer several advantages for photoemission studies. For example, photoemission spectra are dependent on the particle's size, shape, and composition, providing a wealth of information that allows for the retrieval of genuine electronic properties of condensed phase. In this review, with a focus on submicrometer-sized, dielectric particles and droplets, we explain the utility of photoemission from such systems, summarize several applications from the literature, and present some thoughts on future research directions.
ISSN:0066-426X
1545-1593
DOI:10.1146/annurev-physchem-071719-022655