Fig. 1

Particle Characteristics. Particles were imaged via TEM and further analyzed via DLS. Hydrodynamic diameters and polydispersity indices indicate a larger more homogeneous population among SAD SiNPs when compared to pristine 200 nm SiNPs. This distinct morphology is confirmed by TEM imaging, demonstrating perfectly spherical particles in pristine 200 nm SiNP populations rather than the more variable structure present in environmentally relevant SAD SiNPs