Journal article
Chemical Differences in Environmental Films Collected on Surfaces with Different Hydrophilicity
ACS earth and space chemistry, Vol.8(12), pp.2411-2419
12/19/2024
DOI: 10.1021/acsearthspacechem.4c00170
Appears in UI Libraries Support Open Access
Abstract
Environmental films form when airborne particles and molecular species adsorb on solid surfaces. Recent studies have characterized these films but overlook how collection methods and host-surface character (orientation, chemical functionality, or height) change the deposition process. In this work, environmental films are collected at a rural location on gold and silicon surfaces (water contact angles of ca. 57° and <1°, respectively) to determine how the different substrate changes the properties of the accumulated environmental film. Results show that gold surfaces have a homogeneous distribution of film mass across the surface, while silicon surfaces collect films with irregular patchy domains. The two surfaces also develop different surface coverages and particle number densities, and the particles’ packing arrangements are quantified by analyzing nearest-neighbor distances. Computer-controlled scanning electron microscopy with energy-dispersive X-ray spectroscopy suggests that, despite morphological differences, larger (>5 μm) particles have similar elemental compositions. Minor variations are observed at smaller particle sizes (∼5 μm), which include carbon-rich particles primarily attributed to pollen or biotic activity. Chemical analysis shows the presence of nitrate and sulfate, as well as heterogeneous cation pools on the surfaces.
Details
- Title: Subtitle
- Chemical Differences in Environmental Films Collected on Surfaces with Different Hydrophilicity
- Creators
- Jessica L. DeYoung - University of IowaUchechukwu Grace Akporere - University of IowaZezhen Cheng - Environmental Molecular Sciences LaboratorySwarup China - Environmental Molecular Sciences LaboratoryGregory W. Vandergrift - Environmental Molecular Sciences LaboratoryChristopher R. Anderton - Pacific Northwest National LaboratoryYadong Zhou - Environmental Molecular Sciences LaboratoryZihua Zhu - Environmental Molecular Sciences LaboratoryScott K. Shaw - University of Iowa
- Resource Type
- Journal article
- Publication Details
- ACS earth and space chemistry, Vol.8(12), pp.2411-2419
- Publisher
- American Chemical Society
- DOI
- 10.1021/acsearthspacechem.4c00170
- ISSN
- 2472-3452
- eISSN
- 2472-3452
- Grant note
- U.S. Department of Energy: 71600CH Department of Defense Army Research Office: 10.46936/staf.proj.2020.51590/60000218 Department of Energy Science Graduate Student Research fellowshipOffice of Biological and Environmental Research (BER), U.S. Department of Energy (DOE)Army Research Office or Department of Defense
Department of Defense Army Research Office (71600CH) and the Department of Energy Science Graduate Student Research fellowship. A portion of this work was performed on a project award (10.46936/staf.proj.2020.51590/60000218) at the EMSL, a national scientific user facility sponsored by the Office of Biological and Environmental Research (BER), U.S. Department of Energy (DOE). The EMSL is located at PNNL, a multidisciplinary national laboratory operated by Battelle for the U.S. DOE. Any errors and opinions are not those of the Army Research Office or Department of Defense and are attributable solely to the author(s). As always, the authors are thankful for the excellent support staff and shop facilities at the University of Iowa's Department of Chemistry within the College of Liberal Arts and Sciences.
- Language
- English
- Electronic publication date
- 11/14/2024
- Date published
- 12/19/2024
- Academic Unit
- Chemistry
- Record Identifier
- 9984749860202771
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