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Aerosol AgNPs concentration and morphology of aerosolized particles. Mass concentration comparison of exposure to citrate buffer, 20 or 110 nm AgNP (A) determined by gravimetric filter (gray bars) and XRF filter analysis (black bars). Transmission electron micrographs (TEM) of 20 (B) and 110 nm AgNP (C). Bar = 100 nm.
