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. Author manuscript; available in PMC: 2019 Feb 15.
Published in final edited form as: Adv Exp Med Biol. 2017;947:71–100. doi: 10.1007/978-3-319-47754-1_4

Fig. 4.4.

Fig. 4.4

illustrates precursor SiO2-MNPs prior to dose controlled inhalation into lungs. (a) Large agglomerates. (b) Precursor SiO2-MNPs with amorphous nanostructures and predominantly spherical shape. Some overlapping spheres are marked with circles