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30 May 2022 Ambient observations of Raman spectra from aerosol particles from Maryland and New Mexico
David Doughty, Steven C. Hill
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Proceedings Volume PC12116, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XXIII; PC121160C (2022) https://doi.org/10.1117/12.2618940
Event: SPIE Defense + Commercial Sensing, 2022, Orlando, Florida, United States
Abstract
We measured Raman spectra (RS) of ambient aerosols semi-continuously, to determine the compositions of individual aerosol particles at 15-20 minute time-resolution. The automated aerosol-Raman spectrometer (ARS) we use is Battelle’s (Columbus, OH) REBS. Many RS exhibit a broad luminescence, which can vary from one replicate to another because of photobleaching, thermal changes in crystal structure, or other phenomena. Materials consistent with the measured RS include DG carbon, organic carbon, and minerals such as calcite and quartz. We illustrate differences in the compositions consistent with the RS observed at a semi-urban site in Maryland and a rural site in New Mexico.
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David Doughty and Steven C. Hill "Ambient observations of Raman spectra from aerosol particles from Maryland and New Mexico", Proc. SPIE PC12116, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XXIII, PC121160C (30 May 2022); https://doi.org/10.1117/12.2618940
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KEYWORDS
Atmospheric particles
Aerosols
Raman spectroscopy
Luminescence
Remote sensing
Carbon
Imaging spectroscopy
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