Chemical Imaging of Atmospheric Particles
Abstract
Airborne particles are very dynamic and highly reactive components of the Earth’s atmosphere. Their high surface area and water content provide a unique reaction environment for multiphase chemistry that continually modifies particle composition and properties that consequently impact air quality as well as concentrations of gas-phase species. By absorbing and scattering solar and terrestrial radiation, particles directly influence the planet’s radiative balance. Their indirect effects include modifying the nucleation, lifetime, and physical properties of clouds. Due to the sensitivity of the atmospheric environment to all these variables, fundamental studies of chemical transformations of atmospheric particles, their sources, continuously evolving composition, and physical properties are of highest research priority. Accurate descriptions of particles and their effects in the atmosphere require comprehensive information not only on the particle-type populations and their size distributions and concentrations, but also on the diversity and the spatial heterogeneity of chemical components within individual particles. Developments and applications of modern chemical imaging approaches for off-line characterization of atmospheric particles have been at the forefront of modern experimental studies and have resulted in a transformative impact in atmospheric chemistry and physics. This Account presents a synopsis of recent advances in chemical imaging of atmospheric particles collected on substratesmore »
- Authors:
-
[1];
[2];
- Purdue Univ., West Lafayette, IN (United States)
- Sonoma Technology, Inc., Petaluma, CA (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Publication Date:
- Research Org.:
- Purdue Univ., West Lafayette, IN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- OSTI Identifier:
- 1912593
- Grant/Contract Number:
- SC0018948
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Accounts of Chemical Research
- Additional Journal Information:
- Journal Volume: 52; Journal Issue: 12; Journal ID: ISSN 0001-4842
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; atmospheric particles; chemical imaging; spectro-microscopy
Citation Formats
Laskin, Alexander, Moffet, Ryan C., and Gilles, Mary K. Chemical Imaging of Atmospheric Particles. United States: N. p., 2019.
Web. doi:10.1021/acs.accounts.9b00396.
Laskin, Alexander, Moffet, Ryan C., & Gilles, Mary K. Chemical Imaging of Atmospheric Particles. United States. https://doi.org/10.1021/acs.accounts.9b00396
Laskin, Alexander, Moffet, Ryan C., and Gilles, Mary K. Tue .
"Chemical Imaging of Atmospheric Particles". United States. https://doi.org/10.1021/acs.accounts.9b00396. https://www.osti.gov/servlets/purl/1912593.
@article{osti_1912593,
title = {Chemical Imaging of Atmospheric Particles},
author = {Laskin, Alexander and Moffet, Ryan C. and Gilles, Mary K.},
abstractNote = {Airborne particles are very dynamic and highly reactive components of the Earth’s atmosphere. Their high surface area and water content provide a unique reaction environment for multiphase chemistry that continually modifies particle composition and properties that consequently impact air quality as well as concentrations of gas-phase species. By absorbing and scattering solar and terrestrial radiation, particles directly influence the planet’s radiative balance. Their indirect effects include modifying the nucleation, lifetime, and physical properties of clouds. Due to the sensitivity of the atmospheric environment to all these variables, fundamental studies of chemical transformations of atmospheric particles, their sources, continuously evolving composition, and physical properties are of highest research priority. Accurate descriptions of particles and their effects in the atmosphere require comprehensive information not only on the particle-type populations and their size distributions and concentrations, but also on the diversity and the spatial heterogeneity of chemical components within individual particles. Developments and applications of modern chemical imaging approaches for off-line characterization of atmospheric particles have been at the forefront of modern experimental studies and have resulted in a transformative impact in atmospheric chemistry and physics. This Account presents a synopsis of recent advances in chemical imaging of atmospheric particles collected on substrates during field and laboratory experiments. The unique advantage of chemical imaging methods is that they simultaneously provide two analytical measurements: imaging of particles to assess variability in their individual sizes and morphology, as well as particle specific speciation of their composition and spatial heterogeneity of different chemical components within individual particles. We also highlight analytical chemistry approaches that enable chemical imaging of particles with different levels of elemental and molecular specificity, including applications of multimodal methodologies where the same or similar groups of particles are probed by two or more complementary techniques. These approaches provide unique experimental insights on the nature and sources of particles, understanding their physical properties, atmospheric reactivity, and transformations. Chemical imaging data provide unique experimental input for atmospheric models that simulate aging and changes in particle-type populations, internal composition, and their associated optical and cloud forming properties. Here, we highlight applications of chemical imaging in selected recent studies, discuss their existing limitations, and forecast future research directions for this area.},
doi = {10.1021/acs.accounts.9b00396},
journal = {Accounts of Chemical Research},
number = 12,
volume = 52,
place = {United States},
year = {Tue Nov 12 00:00:00 EST 2019},
month = {Tue Nov 12 00:00:00 EST 2019}
}
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