Fig. 2

Representative SEM images illustrating different intercellular (a–c) and cellular (d–f) ADs after deposition of differently sized particles for 1 h. a, d 100 nm particles with input particle concentration of 7 µg/mL, b, e 200 nm particles with input concentration of 50 µg/mL and c, f 500 nm particles with input particle concentration of 109 µg/mL. Due to their small size, 100 nm particles in d are marked in yellow for better visualization. a–c SE SEM images were taken with 5 keV electron energy. d–f BSE SEM images were taken with 5 keV electron energy and a deceleration voltage of 1.9 kV (a) and 4 kV (e, f). Small dark rectangles are electron beam induced perturbations from previous scans. Scale bar: 5 μm