Fig. 1
From: Aggregation/dispersion transitions of T4 phage triggered by environmental ion availability
Aggregation of bacteriophage T4 visualized by atomic force microscopy, AFM. a. AFM images of T4 bacteriophages on PEI (polyethylene imine) modified mica surface deposited as separate objects from 150 mM NaCl solutions. Scan area 10 × 10 μm. b. AFM images of T4 bacteriophages on PEI (polyethylene imine) modified mica surface deposited in clusters from low ionic strength solution (10 mM NaHCO3) after 100 min of incubation at room temperature. Scan area 1 × 1 μm