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Averaged organic volume fraction measured using AFM at ∼20% RH for individual core–shell SSA particles at four selected volume-equivalent diameter ranges of 0.04–0.18, 0.18–0.56, 0.56–1.00, and 1.00–1.80 μm at 10 m/s (green) and 19 m/s (purple) wind speed conditions. Color bars and error bars represent the average and one standard deviation, respectively.
