Fig. 2From: In vitro exposure of a 3D-tetraculture representative for the alveolar barrier at the air-liquid interface to silver particles and nanowiresSecondary electron images (a-c) and mass filtered secondary ion images (d-f) of Ag20, Ag200 and AgNWs (bar scale 1 μm) obtained on the Helium Ion Microscopy – Secondary Ion Mass Spectrometry (HIM-SIMS) instrument. Samples were deposited on a Silicon waferBack to article page