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. 2024 Nov 28;15:10326. doi: 10.1038/s41467-024-54506-5

Fig. 1. Comprehensive characterization of individual particles from microscopy and single particle mass spectrometry.

Fig. 1

a Representative 75° tilted SEM image of particles. Dark brown arrows indicate some solid-state strongly absorptive BrC (solid S-BrC) as examples. The bar chart shows the fraction of different types of particles based on manual SEM identification (solid S-BrC (spherical): ~93%, other organic aerosol (OA, dome-like or flat shapes): ~6%, black carbon (BC, fractal or compressed small monomer aggregates): <1%, and inorganics (crystal or irregular shapes): <1%). b CCSEM-EDX-derived chemically resolved size distribution of wildfire smoke aerosol. Size distribution indicates carbonaceous (CNO) particles dominate with a mode diameter of ~0.4 µm. The presence of potassium-containing carbonaceous (CNOK) particles is an indicator of wildfire. The size mode at 400 nm is due to the solid S-BrC aggregates. c The average mass spectrum of all particles sampled and characterized by miniSPLAT. The bar plot is the number fraction of 8 solid S-BrC classes based on the miniSPLAT mass spectra (see Section S1).