Journal
REVIEW OF SCIENTIFIC INSTRUMENTS
Volume 81, Issue 1, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3276714
Keywords
aerosols; particle size; photoelectron spectroscopy; surface chemistry; surface composition; X-ray photoelectron spectra; X-ray spectroscopy
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Funding
- Lawrence Berkeley National Laboratory
- U.S. Department of Energy [DE-AC0205CH11231]
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We discuss a new approach for the measurement of the surfaces of free aerosol particles with diameters from 50 to 1000 nm. Particles in this size range have significant influence on the heterogeneous chemistry in the atmosphere and affect human health. Interfacing an aerodynamic lens to an ambient pressure x-ray photoelectron spectrometer permits measurement of the surface chemical composition of unsupported aerosol particles in real time. We discuss the basic considerations for the design of such an instrument, its current limitations and potentials for improvement. Results from a proof-of-principle experiment on silicon oxide particles with average diameters of 270 nm are shown.
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