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. 2020 Oct 8;11(11):6211–6230. doi: 10.1364/BOE.410527

Fig. 5.

Fig. 5.

FESEM images of all nanoparticle formulations: magnetic nanoparticles with (A) reactive thiols, (B) folate, and (C) PSMA inhibitor functionalizations; S421 SERS nanoparticles with (D) reactive thiols, (E) folate, and (F) PSMA inhibitor functionalizations; S440 SERS nanoparticles with (G) reactive thiols, and (H) methoxy group capped functionalizations. Representative close-up images with sizing information of a reactive thiol functionalized (I) magnetic, (J) S421 SERS, and (K) S440 SERS nanoparticle.