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5 March 2021 Photothermal infrared imaging: identification and visualization of micro- and nanoplastics in environmental matrices
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Abstract
Infrared photothermal heterodyne imaging (IR-PHI) is an established all-optical, table-top approach for conducting super-resolution mid-infrared microscopy and spectroscopy on submicrometer-sized particles. The instrument’s capabilities are highlighted by its ability to operate in spectroscopically-crowded environments. This includes specimens obtained from environmental matrices where particulates with different morphologies, chemical compositions, and abundances exist. Here, proof-of-concept IR-PHI measurements have been conducted on anthropogenic micro- and nanoplastics (MNPs) derived from the breakdown of consumer products. In particular, IR-PHI is used to characterize MNPs extracted from steeped plastic teabags and floor dust from a household vacuum. IR-PHI results reveal the presence of complex MNP structures made of polyamide fibers and acrylonitrile butadiene styrene MNPs.
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© (2021) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ilia M. Pavlovetc, Kirill Kniazev, Junyeol Kim, Kyle Doudrick, and Masaru Kuno "Photothermal infrared imaging: identification and visualization of micro- and nanoplastics in environmental matrices", Proc. SPIE 11656, Advanced Chemical Microscopy for Life Science and Translational Medicine 2021, 1165618 (5 March 2021); https://doi.org/10.1117/12.2577003
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