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Volumn 301, Issue 5631, 2003, Pages 340-344

Reactions at interfaces as a source of sulfate formation in sea-salt particles

Author keywords

[No Author keywords available]

Indexed keywords

INTERFACES (MATERIALS); OXIDATION; PARTICLES (PARTICULATE MATTER); SODIUM CHLORIDE; SULFUR DIOXIDE; TROPOSPHERE;

EID: 0038638496     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.1085374     Document Type: Article
Times cited : (261)

References (49)
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    • 2 from air) is expected to be formed. In the case of the NaCl-reacted particles, drying was carried out without exposure to air so that carbonate/bicarbonate was excluded.
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    • note
    • The TOF-SIMS surface images show indistinct blurry particles Larger than expected from the SEM images instead of distinct square crystals because of the halo seen in Fig. 1B. In the static regime, TOF-SIMS is very surface-sensitive, and secondary ions are emitted only from the top 5 nm of the sample. The lack of chemical contrast between the halo and the particle indicates that the halo composition is comparable to that still on the surface of the particles.
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    • note
    • -1, about an order of magnitude smaller than the generation of OH- by the interface reaction. Hence, acidification of sea-salt particles over the remote ocean by nitric acid is unlikely to be important.
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    • H. Sievering et al., Nature 360, 571 (1992).
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    • Armstrong, J.T.1
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    • note
    • This research was performed in the Environmental Molecular Sciences Laboratory, a national scientific user facility sponsored by the Department of Energy's Office of Biological and Environmental Research and located at Pacific Northwest National Laboratory. The authors thank D. Dabdub, E. Knipping, C. W. Spicer, E. Saltzman, S. E. Schwartz, J. E. Penner, and B. M. Laskin for helpful discussions and L. A. Barrie and S. Gong for providing preprints. B.J.F.P. thanks NSF (grants 0079222 and 0209719) and the U.S. Department of Energy (grant FG03-98ER62578) for support during a sabbatical leave when this work was carried out.


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