Influence of collecting substrate on the Raman imaging of micron-sized particles

Falgayrac, Guillaume; Siepka, Damian; Stefaniak, E.; Penel, Guillaume; Sobanska, Sophie

doi:10.1016/j.aca.2018.02.015

Cited by 2 publications

(1 citation statement)

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“…Furthermore, Raman analysis is operated under atmospheric pressure and enables the use of atmospherically relevant concentrations for a long exposure time to examine atmospheric gas-particle interactions (Lee and Chan, 2007a). Micro-Raman systems can provide spatial information of chemical species at 2-D or even 3-D levels (Batonneau et al, 2006;Sobanska et al, 2006Sobanska et al, , 2014Sobanska et al, , 2015Tripathi et al, 2009;Scolaro et al, 2009;Offroy et al, 2015;Falgayrac et al, 2018;Ao et al, 2020). Recent advances in stimulated Raman scattering by micro-Raman spectroscopy further improve the spatial resolution from 1 µm to 350 nm and significantly shorten the scanning time from 2.5 h to 2 s (Ao et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Single-particle Raman spectroscopy for studying physical and chemical processes of atmospheric particles

et al. 2022

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Abstract. Atmospheric particles experience various physical and chemical processes and change their properties during their lifetime. Most studies on atmospheric particles, both in laboratory and field measurements, rely on analyzing an ensemble of particles. Because of different mixing states of individual particles, only average properties can be obtained from studies using ensembles of particles. To better understand the fate and environmental impacts of atmospheric particles, investigations on their properties and processes at a single-particle level are valuable. Among a wealth of analytic techniques, single-particle Raman spectroscopy provides an unambiguous characterization of individual particles under atmospheric pressure in a non-destructive and in situ manner. This paper comprehensively reviews the application of such a technique in the studies of atmospheric particles, including particle hygroscopicity, phase transition and separation, and solute–water interactions, particle pH, and multiphase reactions. Investigations on enhanced Raman spectroscopy and bioaerosols on a single-particle basis are also reviewed. For each application, we describe the principle and representative examples of studies. Finally, we present our views on future directions on both technique development and further applications of single-particle Raman spectroscopy in studying atmospheric particles.

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