Fig. 5: Nanoparticle detection.
From: Holographic detection of nanoparticles using acoustically actuated nanolenses

Lens-free holographic detection of 200 nm polystyrene nanoparticles both a before and b after acoustic actuation. Scale bar for the lensfree image is 100 µm. The colored insets in (b) show the SEM images of the corresponding nanoparticles. The field-of-view for SEM images is 1 µm × 1 µm.