An overview of the optical characterization of free microparticles and their radiative properties

Potenza, Marco A.C.; Cremonesi, Llorenç

doi:10.1016/j.jqsrt.2023.108773

Journal of Quantitative Spectroscopy and Radiative Transfer

2023

DOI: 10.1016/j.jqsrt.2023.108773

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An overview of the optical characterization of free microparticles and their radiative properties

Marco A.C. Potenza,

Llorenç Cremonesi

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2024

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Cited by 3 publications

References 206 publications

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Evidence of Sub‐Micrometric Plastic Release When Heating Food Containers Based on Light Scattering Measurements

Pallavera,

Sanvito,

Cremonesi

et al. 2024

Part & Part Syst Charact

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A growing body of literature is raising concerns about the spread of nano‐ and microplastics and the hazards they pose to the environment and on human health. There is still a limited understanding of their sources and formation mechanisms, making their release and uptake difficult to track and quantify. Among the obstacles to the progress in this field there is the lack of reliable methods for quantitative studies, leading to a potential underestimation of the extent of their release and the related risks. In this paper, the application of an optical method for studying the release of sub‐micrometric plastics in water by polypropylene containers certified for alimentary use is described. The results show evidence of negligible release when the temperature of the water is kept below the manufacturer's specifications, whereas a rampant increase occurs beyond these conditions, irrespective of the thermal history of the sample. Particles with a diameter distribution that spans one order of magnitude are observed, ranging from ≈200 nm to 2 µm, and their refractive index and shape is characterized with light scattering measurements. This work focuses on particle release and does not assess toxicity or effects on living organisms.

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Evidence of Sub‐Micrometric Plastic Release When Heating Food Containers Based on Light Scattering Measurements

Pallavera,

Sanvito,

Cremonesi

et al. 2024

Part & Part Syst Charact

View full text Add to dashboard Cite

show abstract

A customizable digital holographic microscope

Ravasio,

Teruzzi,

Siano

et al. 2024

HardwareX

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Measuring the polarized complex forward-scattering amplitudes of single particles in unbounded fluid flow: CAS-v2 protocol

Moteki,

Adachi

2024

Opt. Express

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A detailed protocol for measuring the complex forward-scattering amplitude S(0°) of single particles, the Complex Amplitude Sensing version 1 (CAS-v1), has recently been developed and used for characterizing environmental particles. However, interpretations of the S(0°) data need a priori assumptions on the particle’s shape, and applications of the method have mostly been limited to the particles suspended in liquids. Here, we thoroughly upgrade the CAS technique to perform quality-controlled S(0°) measurements at two independent polarizations for particles suspended in gases and liquids. The polarization-resolved S(0°) sensing constrains the particle’s shape and improves the physical interpretability of data. An optical coherence backscattering detection technique enables non-invasive yet precise constraints of the particle’s location in the sensing region, realizing precise S(0°) measurements even for aerosol particles introduced via a gas jet without using a flow microchannel. The CAS-v2 protocol proposed here will be useful as a fast yet detailed particle measurement technique for laboratory and field studies.

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An overview of the optical characterization of free microparticles and their radiative properties

Cited by 3 publications

References 206 publications

Evidence of Sub‐Micrometric Plastic Release When Heating Food Containers Based on Light Scattering Measurements

Evidence of Sub‐Micrometric Plastic Release When Heating Food Containers Based on Light Scattering Measurements

A customizable digital holographic microscope

Measuring the polarized complex forward-scattering amplitudes of single particles in unbounded fluid flow: CAS-v2 protocol

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