Fig. 2

Characterization of the 60 nm tannic acid AuNPs. a Representative TEM image of the stock AuNPs verified spherical morphology and was used for analysis of primary NP size. b TEM imaging of the AuNPs was repeated after a 24 h incubation in AAF. c Spectral profile of the AuNPs following dispersion in water, media, and AAF demonstrate a fluid-specific disruption of the AuNPs plasmonic properties