Physical and Chemical Morphology of Passively Sampled Environmental Films

Jacob S Grant; Zihua Zhu; Christopher R Anderton; Scott K Shaw

doi:10.1021/acsearthspacechem.8b00158

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Physical and Chemical Morphology of Passively Sampled Environmental Films

Journal article

Peer reviewed

Physical and Chemical Morphology of Passively Sampled Environmental Films

Jacob S Grant, Zihua Zhu, Christopher R Anderton and Scott K Shaw

ACS earth and space chemistry, Vol.3(2), pp.305-313

02/21/2019

DOI: 10.1021/acsearthspacechem.8b00158

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Abstract

This work presents spatially resolved physical and chemical surface characterization of passively sampled environmental films developed in urban, suburban, and metropolitan locations. Environmental surface films are important mediators of atmospheric particulate matter (PM) and persistent organic pollutants (POPs) fate and transport. The films are developed via dry deposition onto silicon wafer substrates for time scales ranging from 1 to 52 weeks. Spatial and chemical morphologies of the films are analyzed by bright-field, scanning electron, and atomic force microscopies. Surface feature sizes span 6 orders of magnitude, from the millimeter to nanometer regimes, indicative of super- and sub-micrometer PM as well as conformal films of nanoscale PM and semivolatile molecules. Time-of-flight secondary ion mass spectrometry (ToF-SIMS) imaging data are analyzed to report the films’ chemical morphology and speciation which include a range of organic and inorganic species. Increases in surface coverages (ca. 5% for 1 week and ca. 98% for 52 weeks) reflect accumulation of mineral dust and biogenic organics, and the presence of biological species in the films. SIMS imaging reveals diverse and sometimes segregated chemical domains of organics, inorganics, and proteinaceous macromolecules.

Microscopy

Particulate Matter

SIMS

Environmental Surface

Thin Film

Imaging

Details

Title: Subtitle: Physical and Chemical Morphology of Passively Sampled Environmental Films
Creators: Jacob S Grant
Zihua Zhu
Christopher R Anderton
Scott K Shaw
Resource Type: Journal article
Publication Details: ACS earth and space chemistry, Vol.3(2), pp.305-313
DOI: 10.1021/acsearthspacechem.8b00158
ISSN: 2472-3452
eISSN: 2472-3452
Publisher: American Chemical Society
Grant note: DOI: 10.13039/100000183, name: Army Research Office, award: 71600-CH; DOI: 10.13039/100005187, name: U.S. Nuclear Regulatory Commission, award: NRC-HQ-84-14-G-0037; name: Center for Health Effects of Environmental Contamination
Language: English
Date published: 02/21/2019
Academic Unit: Chemistry
Record Identifier: 9983985818302771

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