In Situ Quantitative Observation of Hygroscopic Growth of Single Nanoparticle Aerosol by Surface Plasmon Resonance Microscopy

Diagrammatic sketches of the in situ SPRM-ARI single nanoparticle moisture absorption system. Comparison of the predicted and measured hygroscopic growth factors of (a) NaCl, (b) NaNO3, (c) glucose, and (d) oxalic acid (OA) particles with a dry diameter of 90 nm. Hygroscopic growth and deliquescence of bicomponent nanoparticles (90 nm in size) with the NaCl-to-NaNO3 mass ratios of (a) 3:1, (b) 1:1, and (c) 1:3. Hygroscopic growth and deliquescence of NaCl + glucose bicomponent nanoparticles (90 nm in size) with the NaCl-to-glucose mass ratios of (a) 3:1, (b) 1:1, and (c) 1:3. Hygroscopic growth and deliquescence of NaCl + OA nanoparticles (90 nm in the size) with the NaCl-to-OA mass ratios of (a) 3:1, (b) 1:1, and (c) 1:3. Comparison of water contents in nanoparticles (90 nm in size)